The speed test overview

Based on the speed test tests and additional research, for example with the Website Carbon Calculator and the Tingtun Checker, the following overview has been made per speed test.

  1. Astound
  2. Bandwidth Place
  3. Bredbandskollen
  4. Broadband Speed Checker
  5. Cloudflare
  6. CompareSpeedTest
  7. Comparitech
  8. DSLReports
  9. Fast
  10. Fireprobe
  11. Google Fiber
  12. Internet Speed at a Glance
  13. LibreSpeed
  14. Measurement Lab (M-Lab)
  15. Meter.net
  16. nPerf
  17. Ookla Speedtest
  18. OpenSpeedTest™
  19. SamKnows Speed Test
  20. Speedcheck™
  21. SpeedOf.me
  22. SpeedOf.me API Sample Page
  23. SpeedSmart
  24. Speedtest4.php
  25. Testmy.net
  26. Toast
  27. Which Broadband Checker
  28. Xfinity Speed Test

Note that some of the speed tests mentioned above, has the option to create a customized version or clone of the original. These speed tests might be mentioned in this list of speed tests.

 
Astound
  1. http://md.speedtest.astound.com/URL: http://md.speedtest.astound.com/ (previously: http://md.speedtest.rcn.net/)
  2. Recommended: No, the standard deviation is unintended large
  3. Download speed (50 Mbps): 48 ± 0.6 Mbps / 47.4..48.6 Mbps / 5 * 10^1 Mbps
  4. Download speed (75 Mbps): 77 ± 5 Mbps / 72..82 Mbps / 8 * 10^1 Mbps NANA
  5. Deviation from advertised download speed (75 Mbps): +5 Mbps
  6. Deviation from real download speed (84 Mbps): -4 Mbps
  7. Category: Miscellaneous
  8. Time to complete: 27 seconds standard deviation 0 seconds
  9. Ads: NoNA
  10. Cookies: Nonologin,nocookies
  11. Accesibility: Some issues, Tingtun score: 60.00 anydevice,easystart,choice,quickfeedback
  12. Other information: progresspertest,download,upload,ping
    1. Progress indicator
  13. Company or owner: Stonepeak Infrastructure Partners owns Astound Broadband which is an US cable operator group to which R C N Corp. belongs
  14. Business justification: Probably was this speed test a service for the customers of RCN
  15. Founded / first occurence: August 2008
  16. Technology: Unknown
  17. Carbon Calculator: 2.15 gram CO2 per homepage visit
  18. Wikipedia: Astound Broadband and RCN Corporation
  19. Tested in: 2021
  20. Particularities / In summary: The Astound speedtest is not recommended because the website is not mobile friendly. RCN seems to be a pretty good speed test, there's not much wrong with it. However, it seems that the speedtest is somewhat orphaned. It appears to be the only working page on the rcn.net domain. This speed test is now redirected to Astound Broadband
 
Bandwidth Place
  1. https://www.bandwidthplace.com/URL: https://www.bandwidthplace.com/
  2. Recommended: No, the median is below the expected correct value
  3. Download speed (50 Mbps): 48.0 ± 0.45Mbps / 47.55..48.45 Mbps / 48 * 10^0 Mbps
  4. Download speed (75 Mbps): 70.00 ± 0.07Mbps / 69.93..70.07 Mbps / 70 * 10^0 Mbps
  5. Download speed (100 Mbps): 95.87 ± 0.12Mbps / 95.75..95.99 Mbps / 96 * 10^0 Mbps
  6. Deviation from advertised download speed (75 Mbps): -5 Mbps
  7. Deviation from real download speed (84 Mbps): -14 Mbps
  8. Category: Conservative (on average 91% of the advertised speed)
  9. Time to complete: 15 seconds standard deviation 4 seconds
  10. Ads: Yesads
  11. Cookies: Yesnologin
  12. Accesibility: Some issues, Tingtun score: 99.56 anydevice,retest,quickfeedback
  13. Other information: progresspertest,download,upload,ping
    1. Progress indicator per test
    2. Upload speed
    3. Ping time
  14. Company or owner: Bandwidth Place LLC
  15. Business justification: Ability to get in touch with potential customers for a new internet subscription
  16. Founded / first occurence: 2002
  17. Technology: Unknown
  18. Carbon Calculator: 0.78 gram CO2 per homepage visit
  19. Wikipedia: No
  20. Tested in: 2021 and 2020 (details)
  21. Particularities / In summary: Bandwidth Place is a fast easy to use conservative speed test. It is a good alternative for Fast.
 
Bredbandskollen
  1. https://www.bredbandskollen.se/en/URL: https://www.bredbandskollen.se/en/
  2. Recommended: No, the median is somewhere between the advertised speed and the actual speed
  3. NANA Download speed (75 Mbps): 77.50 ± 0.20 Mbps / 77.30..77.70 Mbps / 77 * 10^0 Mbps NANA
  4. Deviation from advertised download speed (75 Mbps): +2 Mbps
  5. Deviation from real download speed (84 Mbps): -11 Mbps
  6. Category: Miscellaneous
  7. Time to complete: 22 seconds standard deviation 0.4 seconds
  8. Ads: Nodata
  9. Cookies: Yes
  10. Accesibility: WCAG 1.0 Level A, Tingtun score: 98.23 anydevice,wcag,retest,abort,install,quickfeedback
  11. Other information: totalprogress,download,upload,ping
    1. A progress indicator
    2. Upload speed
    3. Response time
  12. Company or owner: The Swedish Internet Foundation
  13. Business justification: Helping Swedes to become knowledgeable and aware internet users
  14. Founded / first occurence: September 2018
  15. Technology: Sending messages of meaningless data between the web browser and the measurement server via web sockets (protocol ws://)
  16. Carbon Calculator: 0.21 gram CO2 per homepage visit
  17. Wikipedia: No
  18. Tested in: 2022 (details)
  19. Particularities / In summary: Bredbandskollen is run by the The Swedish Internet Foundation. Bredbandskollen was the number 4 speed test in the speed test test of 2022 (although May 2022 the speed test seems to be broken).
 
Broadband Speed Checker
  1. https://www.broadbandspeedchecker.co.uk/URL: https://www.broadbandspeedchecker.co.uk/
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Download speed (50 Mbps): 50.4 ± 0.99 Mbps / 49.41..51.39 Mbps / 5 * 10^1 Mbps
  4. Download speed (75 Mbps): 76.05 ± 1.34 Mbps / 74.71..77.39 Mbps / 8 * 10^1 Mbps NANA
  5. Deviation from advertised download speed (75 Mbps): +5 Mbps
  6. Deviation from real download speed (84 Mbps): -4 Mbps
  7. Category: Miscellaneous
  8. Time to complete: 36 seconds standard deviation 0.5 seconds
  9. Ads: Yesads,data
  10. Cookies: Yesnologin
  11. Accesibility: Some issues, Tingtun score: 99.27 anydevice,retest,install,quickfeedback
  12. Other information: progresspertest,download,upload,ping
    1. Progress indicator per test
    2. Upload speed
    3. Ping time
  13. Company or owner: Speedchecker Ltd
  14. Business justification: Filling their Speed test datasets
  15. Founded / first occurence: September 2007
  16. Technology: HTML5
  17. Carbon Calculator: 0.82 gram CO2 per homepage visit
  18. Wikipedia: No
  19. Tested in: 2022 (details) and 2021
  20. Particularities / In summary: Speedchecker Ltd. offers you to include their speedtest at your website. This speed test is not recommended. The knockout criterion of 30 seconds has not been met.
 
Cloudflare
  1. https://speed.cloudflare.com/URL: https://speed.cloudflare.com/
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Download speed (50 Mbps): 47.2 ± 1.14 Mbps / 46.06..48.34 Mbps / 5 * 10^1 Mbps
  4. Download speed (75 Mbps): 75.2 ± 1.1 Mbps / 74.1..76.3 Mbps / 8 * 10^1 Mbps
  5. Download speed (100 Mbps): 101 ± 0.45 Mbps / 100.55..101.45 Mbps / 101 * 10^0 Mbps
  6. Deviation from advertised download speed (75 Mbps): +5 Mbps
  7. Deviation from real download speed (84 Mbps): -4 Mbps
  8. Category: Mainstream (on average 99% of the advertised speed)
  9. Time to complete: 56 seconds standard deviation 1 seconds
  10. Ads: Nodata
  11. Cookies: Yesnologin
  12. Accesibility: Some issues, Tingtun score: 75.43 anydevice,easystart,retest,abort,quickfeedback
  13. Other information: busy,download,maxdownload,downloadgraph,upload,maxupload,uploadgraph,ping,jitter
    1. A graph of the download speed
    2. Upload speed
    3. A graph of the upload speed
    4. Ping time
    5. Jitter time
    6. Detailed information per test
  14. Company or owner: Cloudflare, Inc.
  15. Business justification: Promote the power of Cloudflare Workers
  16. Founded / first occurence: May 2020
  17. Technology: Cloudflare Workers
  18. Carbon Calculator: 1.78 gram CO2 per homepage visit. Note the test starts immediately and automatically
  19. Wikipedia: Cloudflare
  20. Tested in: 2022 (details) and 2021
  21. Particularities / In summary: This speed test gives a lot of information and has a nice interface. Cloudflare is extremely transparent about the method by which the download speed is determined.
    They state for example that they take the 90th percentile speed as measured speed. That pretty much matches the earlier observation that the actual download speed is 12% faster than the advertised speed.
    In addition, there are clear graphs that indicate that the larger the download, the more accurate the measurement.
    The only drawback of this speed test is the time it takes to complete the test. This is well above the knockout criterion of 30 seconds. Based on that criterion Cloudflare's speed test is not recommended.
    However, Cloudflare deserves an honorable mention. It is not a test for regular use, but it does provide a lot of insight.
 
CompareSpeedTest
  1. NAURL: https://comparespeedtest.net/ (Gone, November 2022)
  2. Recommended: No, the standard deviation is unintended large
  3. NANA NANA NANA Download speed (75 Mbps): 80.64 ± 4.02 Mbps / 76.62..84.66 Mbps / 8 * 10^1 Mbps
  4. Deviation from advertised download speed (75 Mbps): +5 Mbps
  5. Deviation from real download speed (84 Mbps): -4 Mbps
  6. Category: Miscellaneous
  7. Time to complete: 25 seconds standard deviation 0 seconds
  8. Ads: Yesads,data
  9. Cookies: Yesnologin
  10. Accesibility: Some issues, Tingtun score: 87.42 anydevice,wcag,easystart,retest,choice,abort,quickfeedback
  11. Other information: totalprogress,download,upload,ping
    1. A progress indicator
    2. Upload speed
    3. Ping time
  12. Company or owner: Compare Broadband Limited
  13. Business justification: Selling their speed test plugin to hosts
  14. Founded / first occurence: January 2021
  15. Technology: HTML5
  16. Carbon Calculator: 3.56 gram CO2 per homepage visit
  17. Wikipedia: No
  18. Tested in: 2022 (details)
  19. Particularities / In summary: This speed test is not recommended. The deviation is to large to be useful. Besides that the user interface is not optimal. CompareSpeedTest is the only speed test where 2 clicks are required to restart the test.
 
Comparitech
  1. https://www.comparitech.com/internet-providers/speed-test/URL: https://www.comparitech.com/internet-providers/speed-test/
  2. Recommended: No, the median is somewhere between the advertised speed and the actual speed
  3. Download speed (50 Mbps): 54.1 ± 0.74 Mbps / 53.36..54.84 Mbps / 5 * 10^1 Mbps
  4. Download speed (75 Mbps): 81.09 ± 1.40 Mbps / 79.69..82.49 Mbps / 8 * 10^1 Mbps
  5. Download speed (100 Mbps): 110.05 ± 0.03 Mbps / 110.02..110.08 Mbps / 110 * 10^0 Mbps
  6. Deviation from advertised download speed (75 Mbps): +5 Mbps
  7. Deviation from real download speed (84 Mbps): -4 Mbps
  8. Category: Realistic (on average 109% of the advertised speed)
  9. Time to complete: 21 seconds standard deviation 0 seconds
  10. Ads: Nodata
  11. Cookies: Yesnologin
  12. Accesibility: Some issues, Tingtun score: 99.95 anydevice,easystart,retest,quickfeedback
  13. Other information: download,upload,ping
    1. Upload speed
    2. Ping time
  14. Company or owner: Comparitech Limited
  15. Business justification: Extra visitors and referral fees
  16. Founded / first occurence: 2015
  17. Technology: Unknown (Not Flash)
  18. Carbon Calculator: 0.22 gram CO2 per homepage visit
  19. Wikipedia: No
  20. Tested in: 2021 and 2020 (details), second test (details)
  21. Particularities / In summary: Comparitech is a speed test by a wide margin. When you use they donate 1 cent (max one per user) to to either the Electronic Frontier Foundation (EFF) or Computers 4 Africa. Nevertheless, Comparitech was the number 2 speed test in the updated speed test test of 2020.
 
DSLReports
  1. http://www.dslreports.com/speedtestURL: http://www.dslreports.com/speedtest
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Download speed (50 Mbps): 50.9 ± 0.78 Mbps / 50.12..51.68 Mbps / 5 * 10^1 Mbps
  4. Download speed (75 Mbps): 76.2 ± 0.7 Mbps / 75.5..76.9 Mbps / 8 * 10^1 Mbps NANA
  5. Deviation from advertised download speed (75 Mbps): +5 Mbps
  6. Deviation from real download speed (84 Mbps): -4 Mbps
  7. Category: Miscellaneous
  8. Time to complete: 64 seconds standard deviation 2 seconds
  9. Ads: Yesads
  10. Cookies: Yesnologin
  11. Accesibility: Some issues, Tingtun score: 88.27 anydevice,easystart,retest,abort,quickfeedback
  12. Other information: download,downloadgraph,upload,uploadgraph,errormessage
    1. A graph of the download speed
    2. Upload speed
    3. A graph of the upload speed
  13. Company or owner: DSLReports.com / SilverMatrix9 Corp
  14. Business justification: Attract visitors interested in a new ISP broadband contract, sell ads
  15. Founded / first occurence: 2000
  16. Technology: Multi-stream HTML5 speed test
  17. Carbon Calculator: 0.82 gram CO2 per homepage visit
  18. Wikipedia: DSLReports
  19. Tested in: 2022 (details), 2021 and 2020 (details)
  20. Particularities / In summary: DSLReports speed test is a relative critical speed test in the sense that the test is aborted relatively easily. When this speed test works, it works fine, however it takes a long time to complete the test. Hence this speed test is not recommended. The knockout criterion of 30 seconds has not been met.
 
Fast

The test results for Fast did vary that much in the speed test test of 2021 that I decided to do a quick test (2022). The results are:

  1. 65 Mbps (31 seconds)
  2. 78 Mbps (18 seconds)
  3. 69 Mbps (31 seconds)
  4. 71 Mbps (30 seconds)
  5. 67 Mbps (52 seconds)

Based on the measurements above the median is 69 Mbps and the standard deviation is 5.

Note that the standard deviation is larger than the significant number. Based on the standard deviaton the result should be presented as 7 * 10^1 Mbps.

  1. https://fast.com/URL: https://fast.com/
  2. Recommended: No, the median is below the expected correct value
  3. Download speed (50 Mbps): 40 ± 0.8 Mbps / 39.2..40.8 Mbps / 4 * 10^1 Mbps
  4. Download speed (75 Mbps): 69 ± 5 Mbps / 64..74 Mbps / 7 * 10^1 Mbps
  5. Download speed (100 Mbps): 87 ± 4.8 Mbps / 82.2..91.8 Mbps / 9 * 10^1 Mbps
  6. Deviation from advertised download speed (75 Mbps): -5 Mbps
  7. Deviation from real download speed (84 Mbps): -14 Mbps
  8. Category: Conservative (on average 84% of the advertised speed)
  9. Time to complete: 32 seconds standard deviation 12 seconds
  10. Ads: Nodata
  11. Cookies: Nonologin,nocookies
  12. Accesibility: Some issues, Tingtun score: 78.79 anydevice,easystart,retest,abort,quickfeedback
  13. Other information: busy,download
    1. Upload speed
    2. Latency uploaded
    3. Latency loaded
  14. Company or owner: Netflix, Inc.
  15. Business justification: Fast is a selfservice tool for Nexflix users to detect if they have internet problems
  16. Founded / first occurence: May 2016
  17. Technology: Described at Building fast.com
  18. Carbon Calculator: 0.04 gram CO2 per homepage visit
  19. Wikipedia: Netflix
  20. Tested in: In 2022 (see above), 2021 and 2020 (details)
  21. Particularities / In summary: Fast is a very simple tool that gives a quick indication of your download speed. However, Fast has two major drawbacks. First: Fast has a relative large standard deviation. Second: Fast is with the 32 seconds to complete a speed test not that fast. As a result, Fast is not recommended.
 
Fireprobe
  1. https://www.fireprobe.net/enURL: https://www.fireprobe.net/en
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Download speed (50 Mbps): 50.70 ± 1.22 Mbps / 49.88..51.92 Mbps / 5 * 10^1 Mbps
  4. Download speed (75 Mbps): 76.33 ± 0.12 Mbps / 76.21..76.45 Mbps / 76 * 10^0 Mbps
  5. Download speed (100 Mbps): 101.89 ± 0.31 Mbps / 101.58..102.20 Mbps / 102 * 10^0 Mbps
  6. Deviation from advertised download speed (75 Mbps): +1 Mbps
  7. Deviation from real download speed (84 Mbps): -8 Mbps
  8. Category: Mainstream (on average 102% of the advertised speed)
  9. Time to complete: 35 seconds standard deviation 0.4 second
  10. Ads: Nodata
  11. Cookies: Yesnologin
  12. Accesibility: Some issues, Tingtun score: 94.96 anydevice,easystart,retest,quickfeedback
  13. Other information: progresspertest,download,downloadgraph,upload,uploadgraph,ping,jitter
    1. A graph of the download speed
    2. Upload speed
    3. A graph of the upload speed
    4. Ping
    5. Jitter
    6. Quality score per online activity
  14. Company or owner: V-SPEED Sp. z o.o.
  15. Business justification: Selling speed tests to ISP's and ads
  16. Founded / first occurence: April 2020
  17. Technology: HTML5
  18. Carbon Calculator: 0.51 gram CO2 per homepage visit
  19. Wikipedia: No
  20. Tested in: 2022 (details), 2021 and 2020 (details)
  21. Particularities / In summary: Fireprobe is a decent speed test. When the test is complete you get a nice overview of the expected quality for several common internet services. With 35 seconds to complete, the knockout criterion of 30 seconds has not been met.
 
Google Fiber

The result page of Google Fiber's speed test

  1. http://speed.googlefiber.net/URL: http://speed.googlefiber.net/
  2. Recommended: Yes
  3. Download speed (50 Mbps): 50.8 ± 0.23 Mbps / 50.57..51.03 Mbps / 51 * 10^0 Mbps
  4. Download speed (75 Mbps): 76.3 ± 0.4 Mbps / 75.9..76.7 Mbps / 76 * 10^0 Mbps
  5. Download speed (100 Mbps): 102 ± 0 Mbps / 102..102 Mbps / 1020 * 10^-1 Mbps
  6. Deviation from advertised download speed (75 Mbps): +1 Mbps
  7. Deviation from real download speed (84 Mbps): -8 Mbps
  8. Category: Mainstream (on average 102% of the advertised speed)
  9. Time to complete: 16 seconds standard deviation 0.5 seconds
  10. Ads: Nodata
  11. Cookies: Nonologin,nocookies
  12. Accesibility: WCAG 1.0 Level A, Tingtun score: NA anydevice,wcag,retest,abort,quickfeedback
  13. Other information: download,upload,ping
    1. Upload speed
    2. Ping
  14. Company or owner: Google Fiber Inc.
  15. Business justification: Promoting Google Fiber. A high-speed broadband internet service that uses fiber optic cable to deliver fast internet
  16. Founded / first occurence: October 2015
  17. Technology: Unknown
  18. Carbon Calculator: 0.15 gram CO2 per homepage visit
  19. Wikipedia: Google Fiber
  20. Tested in: 2022 (details), 2021 and 2020 (details)
  21. Particularities / In summary: Google Fiber's speed test is designed for testing speeds in the 1 - 2 Gb range, however it works also fine when you have a lower download speed. With 16 seconds to complete, Google Fiber is one of the fastest speed tests there is. Google Fiber was the number 1 speed test in the 2020 and has the highest overall score in 2022. Hence Google Fiber is a highly recommended speed test.
 
Internet Speed at a Glance

The result page of the speed test 'Internet Speed at a Glance'

  1. https://speedtest.zomdir.com/URL: https://speedtest.zomdir.com/
  2. Recommended: Yes
  3. Download speed (50 Mbps): 50..100 Mbps NANA
  4. Download speed (75 Mbps): 50..100 Mbps NANA
  5. Download speed (100 Mbps): 50..200 Mbps NANA
  6. Deviation from advertised download speed (75 Mbps): 25..25 Mbps
  7. Deviation from real download speed (84 Mbps): -34..+16 Mbps
  8. Category: Realistic (and conservative)
  9. Time to complete: 1 seconds standard deviation 0 seconds
  10. Ads: NoNA
  11. Cookies: Nonologin,nocookies
  12. Accesibility: WCAG 2.0 (level A), Tingtun score: 100.00 anydevice,wcag,easystart,retest,colorscheme,install,quickfeedback
  13. Other information: download,latency,significantnumber
    1. Latency
  14. Company or owner: Hans van der Graaf
  15. Business justification: None, ZOMDir is a hobby project
  16. Founded / first occurence: September 2017
  17. Technology: Described at The power of Internet Speed at a Glance
  18. Carbon Calculator: 0.30 gram CO2 per homepage visit
  19. Wikipedia: No
  20. Tested in: 2021 and 2020 (details), second test (details)
  21. Particularities / In summary: Internet Speed at a Glance is by far the fastest speed test there is. This speed comes at the expense of the accuracy of the results. The Download speed is only indicated with a lower and upper limit. Internet Speed at a Glance is therefore extremely suitable for quickly finding out whether there are problems with your internet connection. When interpreting these speed test results, keep in mind that both "The ultimate speed test test" and "Internet Speed at a Glance" were created by Hans van der Graaf as part of the ZOMDir project.
 
LibreSpeed
  1. https://librespeed.org/URL: https://librespeed.org/
  2. Recommended: No, the median is somewhere between the advertised speed and the actual speed
  3. Download speed (50 Mbps): 54.3 ± 0.15 Mbps / 54.15..54.45 Mbps / 54 * 10^0 Mbps
  4. Download speed (75 Mbps): 80.8 ± 0.3 Mbps / 80.5..81.1 Mbps / 8 * 10^1 Mbps NANA
  5. Deviation from advertised download speed (75 Mbps): +5 Mbps
  6. Deviation from real download speed (84 Mbps): -4 Mbps
  7. Category: Ambiguous
  8. Time to complete: 23 seconds standard deviation 0 seconds
  9. Ads: Nodata
  10. Cookies: Nonologin,nocookies
  11. Accesibility: WCAG 1.0 Level A, Tingtun score: 100.00 anydevice,wcag,easystart,retest,abort,quickfeedback
  12. Other information: progresspertest,download,upload,ping,jitter
    1. Upload speed
    2. Ping
    3. Jitter
  13. Company or owner: Federico Dossena
  14. Business justification: LibreSpeed is part of Federico's portfolio
  15. Founded / first occurence: 2016
  16. Technology: Javascript, using XMLHttpRequest and Web Workers. LibreSpeed is available at Github
  17. Carbon Calculator: 0.03 gram CO2 per homepage visit
  18. Wikipedia: No
  19. Tested in: 2021 and 2020 (details)
  20. Particularities / In summary: LibreSpeed is a nice speed test. It is available at Github under the GNU Lesser General Public License v3.0. LibreSpeed was the number 3 speed test in the second ultimate speed test of 2020.
 
Measurement Lab (M-Lab)

The result page of the M-Lab speed test

  1. https://speed.measurementlab.net/URL: https://speed.measurementlab.net/
  2. Recommended: Yes
  3. Download speed (50 Mbps): 50.72 ± 0.96 Mbps / 49.76..51.68 Mbps / 5 * 10^1 Mbps
  4. Download speed (75 Mbps): 76.11 ± 0.04 Mbps / 76.07..76.15 Mbps / 761 * 10^-1 Mbps
  5. Download speed (100 Mbps): 101.55 ± 0.08 Mbps / 101.47..101.63 Mbps / 101 * 10^0 Mbps
  6. Deviation from advertised download speed (75 Mbps): +1.1 Mbps
  7. Deviation from real download speed (84 Mbps): -7.9 Mbps
  8. Category: Mainstream (on average 101% of the advertised speed)
  9. Time to complete: 21 seconds standard deviation 0 seconds
  10. Ads: Nodata
  11. Cookies: Nonologin,nocookies
  12. Accesibility: Some issues, Tingtun score: 80.00 anydevice,quickfeedback
  13. Other information: totalprogress,download,upload,latency,significantnumber
    1. Progress indicator
    2. Upload speed
    3. Latency
  14. Company or owner: Code for Science and Society although better said M-Lab is a fiscally sponsored open source project of Code for Science and Society
  15. Business justification: Code for Science and Society, Inc. is a registered US 501(c)(3) public charity that aims to increase global access to knowledge so that power shifts to communities
  16. Founded / first occurence: January 2009
  17. Technology: M-Lab’s NDT test tries to transfer as much data as it can in ten seconds (both up and down), using a single connection to an M-Lab server. Source code is avaiable at Github - mlab-speedtest and Github - NDTTestMethodology
  18. Carbon Calculator: 0.23 gram CO2 per homepage visit
  19. Wikipedia: No
  20. Tested in: 2022 (details), 2021 and 2020 (details)
  21. Particularities / In summary: M-Lab is a great speed test. It was number 2 in the ultimate speed test test of 2022 and number 5 in the first test of 2020. When you Google speedtest you get the suggestion to perform a M-Lab based speed test.
 
Meter.net
  1. https://www.meter.net/URL: https://www.meter.net/
  2. Recommended: No, the median is below the expected correct value
  3. NANA Download speed (75 Mbps): 73.79 ± 1.50 Mbps / 72.29..75.29 Mbps / 7 * 10^1 Mbps
  4. Download speed (100 Mbps): 100.8 ± 1.6 Mbps / 99.2..102.4 Mbps / 10 * 10^1 Mbps
  5. Deviation from advertised download speed (75 Mbps): -5 Mbps
  6. Deviation from real download speed (84 Mbps): -14 Mbps
  7. Category: Mainstream (on average 100% of the advertised speed)
  8. Time to complete: 24 seconds standard deviation 1 second
  9. Ads: Yesads
  10. Cookies: Yesnologin
  11. Accesibility: Some issues, Tingtun score: 99.80 anydevice,retest,colorscheme,quickfeedback
  12. Other information: totalprogress,download,downloadgraph,upload,uploadgraph,ping
    1. Progress indicator
    2. A graph of the download speed
    3. Upload speed
    4. A graph of the upload speed
    5. Ping
    6. Jitter
  13. Company or owner: Adam Haken European VAT number: CZ8106023189 (A check with VIES is possible)
  14. Business justification: Probably ads
  15. Founded / first occurence: 2001
  16. Technology: Unknown
  17. Carbon Calculator: 0.27 gram CO2 per homepage visit
  18. Wikipedia: No
  19. Tested in: 2022 (details) and 2021
  20. Particularities / In summary: Meter.net has a long history. It's a 'sympathetic' speed test. You might change the website theme from light to dark. Meter.net has 13 localized versions and has a website plug-in service. Meter.net reached number 5 in the ultimate speed test test of 2022.
 
nPerf
  1. https://www.nperf.com/en/URL: https://www.nperf.com/en/
  2. Recommended: No, the median is somewhere between the advertised speed and the actual speed
  3. Download speed (50 Mbps): 51.49 ± 0.07 Mbps / 51.42..51.56 Mbps / 51 * 10^0 Mbps
  4. Download speed (75 Mbps): 77.37 ± 0.21 Mbps / 77.16..77.58 Mbps / 8 * 10^1 Mbps NANA
  5. Deviation from advertised download speed (75 Mbps): +5 Mbps
  6. Deviation from real download speed (84 Mbps): -4 Mbps
  7. Category: Miscellaneous
  8. Time to complete: 70 seconds standard deviation 1 seconds
  9. Ads: Nodata
  10. Cookies: Yesnologin
  11. Accesibility: Some issues, Tingtun score: 83.63 easystart,retest,quickfeedback
  12. Other information: progresspertest,download,downloadgraph,upload,uploadgraph,ping
    1. Progress indicator per test
    2. A graph of the download speed
    3. Upload speed
    4. A graph of the upload speed
    5. Ping
  13. Company or owner: nPerf SAS company is a simplified joint-stock company with a share capital of €65,250, registered with the RCS (Commercial Registry) of Lyon under number B 450 208 244)
  14. Business justification: Selling nPerf raw data and nominating ISPś worldwide as independent tester
  15. Founded / first occurence: December 2014
  16. Technology: HTML5 and JavaScript
  17. Carbon Calculator: 0.44 gram CO2 per homepage visit
  18. Wikipedia: No
  19. Tested in: 2021
  20. Particularities / In summary: This speed test is not recommended. With 70 seconds, the knockout criterion of 30 seconds has not been met. Besides that nPerf doesn't work with Safari on iOS, hence it did not met the related knockout criterion. It is possible to take a free license on nPerf's Web Plugin.
 
Ookla Speedtest
  1. https://www.speedtest.net/URL: https://www.speedtest.net/
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Download speed (50 Mbps): 49.69 ± 0.43 Mbps / 49.26..50.12 Mbps / 5 * 10^1 Mbps
  4. Download speed (75 Mbps): 76.17 ± 0.12 Mbps / 76.05..76.29 Mbps / 76 * 10^0 Mbps
  5. Download speed (100 Mbps): 101.78 ± 0.19 Mbps / 101.59..101.97 Mbps / 101 * 10^0 Mbps
  6. Deviation from advertised download speed (75 Mbps): +1 Mbps
  7. Deviation from real download speed (84 Mbps): -8 Mbps
  8. Category: Mainstream (on average 100% of the advertised speed)
  9. Time to complete: 39 seconds standard deviation 1 seconds
  10. Ads: Yesads,data
  11. Cookies: Yesnologin
  12. Accesibility: Some issues, Tingtun score: 100.00 anydevice,retest,install,quickfeedback
  13. Other information: progresspertest,download,upload,ping,latency
    1. Progress indicator per test
    2. A graph of the download speed
    3. Upload speed
    4. A graph of the upload speed
    5. Ping
  14. Company or owner: Ookla, LLC is an independently operating subsidiary of Ziff Davis
  15. Business justification: Selling speed tests to ISP's
  16. Founded / first occurence: May 2000, under the name Ookla since April 2006
  17. Technology: HTML5
  18. Carbon Calculator: 1.86 gram CO2 per homepage visit
  19. Wikipedia: Speedtest.net
  20. Tested in: 2022 (details), 2021 and 2020 (details)
  21. Particularities / In summary: Although the Ookla Speedtest is the best known speed test out there, this speed test is not recommended. At 39 seconds, the knockout criterion of 30 seconds is not met. Only if you complain about your internet speed with your ISP is it recommended to use the Ookla Speedtest. The Ookla Speedtest was number 4 in the first ultimate speed test test of 2020.
 
OpenSpeedTest™
  1. https://openspeedtest.com/URL: https://openspeedtest.com/
  2. Recommended: No, the median is somewhere between the advertised speed and the actual speed
  3. Download speed (50 Mbps): 52.21 ± 0.09 Mbps / 52.12..52.30 Mbps / 52 * 10^0 Mbps
  4. Download speed (75 Mbps): 79.26 ± 0.55 Mbps / 78.71..79.81 Mbps / 8 * 10^1 Mbps
  5. Download speed (100 Mbps): 105.39 ± 0.27 Mbps / 105.12..105.66 Mbps 11 * 10^1 Mbps
  6. Deviation from advertised download speed (75 Mbps): +5 Mbps
  7. Deviation from real download speed (84 Mbps): -4 Mbps
  8. Category: Ambiguous (on average 106% of the advertised speed)
  9. Time to complete: 35 seconds standard deviation 0 seconds
  10. Ads: Yesads
  11. Cookies: Yesnologin
  12. Accesibility: Some issues, Tingtun score: 98.81 anydevice,install,colorscheme,quickfeedback
  13. Other information: progresspertest,download,upload,ping,jitter
    1. Progress indicator per test
    2. A graph of the download speed
    3. Upload speed
    4. A graph of the upload speed
    5. Ping
    6. Jitter
  14. Company or owner: Unknown
  15. Business justification: Selling ads
  16. Founded / first occurence: September 2013
  17. Technology: JavaScript and HTML5
  18. Carbon Calculator: 0.50 gram CO2 per homepage visit
  19. Wikipedia: No
  20. Tested in: 2021
  21. Particularities / In summary: OpenSpeedTest™ is not recommended. The knockout criterion of 30 seconds is not met. OpenSpeedTest™ offers you to use the fullversion application for free at your own website but gives you also a Docker option and the source code at Github
 
SamKnows Speed Test
  1. http://www.broadbandperformance.co.uk/URL: http://www.broadbandperformance.co.uk/
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Download speed (50 Mbps): 51.4 ± 0.6 Mbps / 50.8..52.0 Mbps / 5 * 10^1 Mbps
  4. Download speed (75 Mbps): 76.4 ± 0.0 Mbps / 76.4 Mbps / 764 * 10^-1 Mbps NANA
  5. Deviation from advertised download speed (75 Mbps): +1.4 Mbps
  6. Deviation from real download speed (84 Mbps): -7.6 Mbps
  7. Category: Miscellaneous
  8. Time to complete: 42 seconds standard deviation 2 seconds
  9. Ads: NoNA
  10. Cookies: Nonologin,nocookies
  11. Accesibility: Some issues, Tingtun score: 82.62 anydevice,easystart,retest,quickfeedback
  12. Other information: download,upload,latency,significantnumber
    1. Upload speed
    2. Latency
  13. Company or owner: SamKnows Limited
  14. Business justification: It is probably an example of the tools created by SamKnows
  15. Founded / first occurence: May 2016
  16. Technology: Unknown
  17. Carbon Calculator: 0.66 gram CO2 per homepage visit
  18. Wikipedia: No
  19. Tested in: 2022 (details), 2021 and 2020 (details)
  20. Particularities / In summary: The name of this speed test is a little confusing. The title of the webpage is: SamKnows Speed Test, the URL is www .broadbandperformance .co .uk and the first thing you see above the test is Watchdog. This speed test comes across as orphaned, probably because it is cloned at speedtest.samknows.com. This speed test is not recommended because the knockout criterion of 30 seconds is not met. The same applies to speedtest.samknows.com
 
Speedcheck™

Speedcheck™ is a speed test which I ignored in the past because I thought it was a clone of Ookla's speedtest.net. It seems that I was wrong, so I tested Speedcheck™ after the ultimate speedtest of 2022. The results are:

  1. 74.03 Mbps (32 seconds)
  2. 72.73 Mbps (32 seconds)
  3. 73.27 Mbps (31 seconds)
  4. 73.53 Mbps (31 seconds)
  5. 72.31 Mbps (31 seconds)

Based on the measurements above the median is 73.27 Mbps and the standard deviation is 0.7.

Note that the standard deviation is larger than the significant number. Based on the standard deviaton the result should be presented as 7 * 10^1 Mbps.

  1. https://www.speedcheck.org/URL: https://www.speedcheck.org/
  2. Recommended: No, the median is below the expected correct value
  3. Download speed (75 Mbps): 73 ± 0.7 Mbps / 72..74 Mbps / 7 * 10^1 Mbps NANA NANA
  4. Deviation from advertised download speed (75 Mbps): -5 Mbps
  5. Deviation from real download speed (84 Mbps): -14 Mbps
  6. Category: Conservative
  7. Time to complete: 31 seconds standard deviation 1 second
  8. Ads: Yesads,data
  9. Cookies: Yesnologin
  10. Accesibility: Some issues, Tingtun score: 99.01 anydevice,retest,quickfeedback
  11. Other information: progresspertest,download,upload,latency
    1. A graph of the download speed
    2. The stability of the download speed
    3. Upload speed
    4. A graph of the upload speed
    5. The stability of the upload speed
    6. Latency
  12. Company or owner: Speedcheck™ is a trademark of Etrality GmbH
  13. Business justification: Collecting data for the WiFi Finder app and selling ads
  14. Founded / first occurence: June 2018
  15. Technology: Unknown
  16. Carbon Calculator: 0.47 gram CO2 per homepage visit
  17. Wikipedia: No
  18. Tested in: In 2022 (see above)
  19. Particularities / In summary: At the bottom of the homepage there is the paragraph "What is the best internet speed test?". Speedcheck™ claimed that they has tested and reviewed all available speed tests in the market. However only 10 speed tests are tested and some of these speed tests are Ookla clones.
    Speedcheck™ is a conservative speed test. The median is below the expected correct value. Besides that Speedcheck™ does not met the knockout criterion of 30 seconds to complete. Hence this speed test is not recommended.
 
SpeedOf.me
  1. https://speedof.me/URL: https://speedof.me/
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Download speed (50 Mbps): 56.18 ± 0.28 Mbps / 55.90..56.46 Mbps / 56 * 10^0 Mbps
  4. Download speed (75 Mbps): 83.50 ± 0.05 Mbps / 83.45..83.55 Mbps / 84 * 10^0 Mbps
  5. Download speed (100 Mbps): 111.52 ± 0.04 Mbps / 111.48..111.56 Mbps 11 * 10^1 Mbps
  6. Deviation from advertised download speed (75 Mbps): +9 Mbps
  7. Deviation from real download speed (84 Mbps): 0 Mbps
  8. Category: Realistic (on average 112% of the advertised speed)
  9. Time to complete: 51 seconds standard deviation 1 second
  10. Ads: Yesads,data
  11. Cookies: Yesnologin
  12. Accesibility: Some issues, Tingtun score: 99.23 anydevice,retest,install,quickfeedback
  13. Other information: download,maxdownload,downloadgraph,upload,maxupload,uploadgraph,latency
    1. A graph of the download speed
    2. The max download speed
    3. Upload speed
    4. A graph of the upload speed
    5. The max upload speed
    6. Latency
  14. Company or owner: Speed Of Me, LLC
  15. Business justification: Ads and promoting and selling the SpeedOf.Me API
  16. Founded / first occurence: December 2011
  17. Technology: JavaScript and HTML5
  18. Carbon Calculator: 1.01 gram CO2 per homepage visit
  19. Wikipedia: Speedof.me
  20. Tested in: 2021 and 2020 (details), second test (details)
  21. Particularities / In summary: SpeedOf.me is an excellent speed test that clearly shows how the measured speed is achieved. In 2020, I learned that SpeedOf.me's maximum download speed is the actual download speed. SpeedOf.me was therefore the number 1 speed test in the updated speed test of 2020. In 2021 it was again determined that SpeedOf.me is the most accurate realistic speed test available. SpeedOf.me would therefore certainly have to earn a place in the top 5 speed test, were it not for the fact that the knockout criterion of 30 seconds was not met with 51 seconds. However, if you want to learn more about speed tests, SpeedOf.me is recommended.
 
SpeedOf.me API Sample Page
  1. https://speedof.me/api/doc/sample1.htmlURL: https://speedof.me/api/doc/sample1.html
  2. Recommended: Yes
  3. Download speed (100 Mbps standard): 111.41 ± 0.07 Mbps / 111.34..111.48 Mbps / 111 * 10^0 Mbps
  4. Download speed (100 Mbps faster): 110.48 ± 0.07 Mbps / 110.41..110.55 Mbps / 110 * 10^0 Mbps NANA NANA
  5. Deviation from advertised download speed (100 Mbps): +11 Mbps (standard), +10 Mbps (faster)
  6. Deviation from real download speed (112 Mbps): -1 Mbps (standard), -2 Mbps (faster)
  7. Category: Realistic (111% of the advertised speed)
  8. Time to complete: 24 seconds standard deviation 0 second (standard), 4 seconds standard deviation 0 second (faster)
  9. Ads: Nodata
  10. Cookies: Yesnologin
  11. Accesibility: Some issues, Tingtun score: 79.23 anydevice,easystart,retest,choice,quickfeedback
  12. Other information (standard): download,upload,latency,jitter
    1. Upload speed
    2. Latency
    3. Jitter
  13. Company or owner: Speed Of Me, LLC
  14. Business justification: Promoting and selling the SpeedOf.Me API
  15. Founded / first occurence: December 2011
  16. Technology: JavaScript and HTML5
  17. Carbon Calculator: 0.09 gram CO2 per homepage visit
  18. Wikipedia: Speedof.me
  19. Tested in: 2022 (details)
  20. Particularities / In summary: The SpeedOf.me API Sample Page is a very basic demo page of the SpeedOf.me API. The results are excellent, when you disable other tests. In 4 seconds you have measured your actual download speed measured accurately! It will be a pleasure to test speed test based on this API. If you don't mind a simple interface, this is a great speed test.
 
SpeedSmart

The result page of the SpeedSmart speed test

  1. https://speedsmart.net/URL: https://speedsmart.net/
  2. Recommended: Yes
  3. Download speed (50 Mbps): 54.48 ± 0.11 Mbps / 54.37..54.59 Mbps / 5 * 10^1 Mbps
  4. Download speed (75 Mbps): 75.37 ± 0.20 Mbps / 75.17.. 75.57 Mbps / 75 * 10^0 Mbps
  5. Download speed (100 Mbps): 103.1 ± 1.2 Mbps / 101.9..104.3 Mbps 10 * 10^1 Mbps
  6. Deviation from advertised download speed (75 Mbps): 0 Mbps
  7. Deviation from real download speed (84 Mbps): -9 Mbps
  8. Category: Ambiguous (on average 106% of the advertised speed)
  9. Time to complete: 27 seconds standard deviation 0 seconds
  10. Ads: NoNA
  11. Cookies: Yesnologin
  12. Accesibility: Some issues, Tingtun score: 86.03 anydevice,easystart,retest,colorscheme,quickfeedback
  13. Other information: -download,upload,ping,jitter
    1. Progress indicator per test
    2. Upload speed
    3. Ping
  14. Company or owner: VeeApps
  15. Business justification: Ads in Apps (the website promotes the apps)
  16. Founded / first occurence: March 2015
  17. Technology: HTML5
  18. Carbon Calculator: 0.44 gram CO2 per homepage visit
  19. Wikipedia: No
  20. Tested in: 2022 (details), 2021 and 2020 (details), second test (details)
  21. Particularities / In summary: SpeedSmart is a decent speed test. It was number 4 in 2020 (updated) and number 3 in 2022.
 
Speedtest4.php
  1. https://isp.haydont.net/speedtest4.phpURL: https://isp.haydont.net/speedtest4.php
  2. Recommended: No, no meaningfull results
  3. Download speed (50 Mbps): 243 ± 28 Mbps / 215..271 Mbps / 2 * 10^2 Mbps NANA NANA
  4. Download speed (75 Mbps): Very inaccurate
  5. Category: Miscellaneous
  6. Time to complete: NA
  7. Ads: Yesads,data
  8. Cookies: Nonologin,nocookies
  9. Accessibility: Tingtun score: 83.37 easystart,retest,quickfeedback
  10. Other information: NA download
  11. Company or owner: Emmanuel Haydont
  12. Business justification: Unknown
  13. Founded / first occurence: November 2004
  14. Technology: PHP
  15. Carbon Calculator: 1.71 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: NA, in 2020 and 2021 it was concluded that there are no meaningful results.
  18. Particularities / In summary: This speed test is not recommended. This speed test is outdated and very inaccurate
 
Testmy.net
  1. https://testmy.net/URL: https://testmy.net/
  2. Recommended: No, the median is below the expected correct value
  3. Download speed (50 Mbps): 50.8 ± 0.25 Mbps / 50.55..51.05 Mbps / 51 * 10^0 Mbps
  4. Download speed (75 Mbps): 36.3 ± 0.9 Mbps / 35.4..37.2 Mbps / 4 * 10^1 Mbps
  5. Download speed (100 Mbps): 101.5 ± 1.4 Mbps / 100.1..102.9 Mbps 10 * 10^1 Mbps
  6. Deviation from advertised download speed (75 Mbps): -35 Mbps
  7. Deviation from real download speed (84 Mbps): -44 Mbps
  8. Category: Mainstream (on average 102% of the advertised speed)
  9. Time to complete: 25 seconds standard deviation 4 seconds
  10. Ads: Yesads
  11. Cookies: Yesnologin
  12. Accesibility: Some issues, Tingtun score: 99.25 anydevice,retest,choice,abort,install,colorscheme,quickfeedback
  13. Other information: estbytes,download,maxdownload,upload,maxupload,latency
    1. A graph of the download speed
    2. Upload speed
    3. Latency
  14. Company or owner: TestMy Net LLC
  15. Business justification: Ads
  16. Founded / first occurence: 1996 (tab information)
  17. Technology: Unknown
  18. Carbon Calculator: 0.71 gram CO2 per homepage visit
  19. Wikipedia: No
  20. Tested in: 2022 (details) and 2021
  21. Particularities / In summary: Testmy.net is not recommended. The deviation from the expected results is too great. The usability knockout criterion probably applies. In 2020 it seems that 3 clicks to start the test where necessary. During the 2022 test, 2 clicks seem sufficient. However, a double check for this overview requires 3 clicks.
 
Toast
  1. https://performance.toast.net/URL: https://performance.toast.net/
  2. Recommended: No, the standard deviation is unintended large
  3. Download speed (50 Mbps): 45.9 ± 5.5 Mbps / 40.4..51.4 Mbps / 5 * 10^1 Mbps
  4. Download speed (75 Mbps): 71.2 ± 8.1 Mbps / 63.1..79.3 Mbps / 60..80 Mbps NANA
  5. Deviation from advertised download speed (75 Mbps): -15..+5 Mbps
  6. Deviation from real download speed (84 Mbps): -24..-4 Mbps
  7. Category: Miscellaneous
  8. Time to complete: 10 seconds standard deviation 2 seconds
  9. Ads: Yesads
  10. Cookies: Yesnologin
  11. Accesibility: Some issues, Tingtun score: 88.88 anydevice,easystart,quickfeedback
  12. Other information: download
    1. None
  13. Company or owner: TOAST.NET LEASING, LLC.
  14. Business justification: Ads
  15. Founded / first occurence: January 1999
  16. Technology: Measure the time to download a large image
  17. Carbon Calculator: 1.23 gram CO2 per homepage visit
  18. Wikipedia: No
  19. Tested in: 2021, 2020 and second test
  20. Particularities / In summary: Toast is not recommended. In 2020 it was concluded that there are no meaningful results. In 2021 it was concluded that there might be meaningful results, however when this speed test was double checked for this overview the results vary that much that this speed test could not be recommended.
 
Which Broadband Checker
  1. https://broadbandtest.which.co.uk/URL: https://broadbandtest.which.co.uk/
  2. Recommended: No, the median is below the expected correct value
  3. Download speed (75 Mbps): 72.1 ± 1.0 Mbps / 71.1..73.1 Mbps / 7 * 10^1 Mbps NANA NANA
  4. Deviation from advertised download speed (75 Mbps): -5 Mbps
  5. Deviation from real download speed (84 Mbps): -14 Mbps
  6. Category: Miscellaneous
  7. Time to complete: 36 seconds standard deviation 0 seconds
  8. Ads: NoNA
  9. Cookies: Yesnologin
  10. Accesibility: Probably some issues, Tingtun score: 90.09 anydevice,quickfeedback
  11. Other information: totalprogress,progresspertest,download,upload,latency
    1. Progress indicator
    2. Progress indicator per test
    3. Upload speed
    4. Latency
  12. Company or owner: Which Limited
  13. Business justification: Which? helps consumers with choosing a broadband provider
  14. Founded / first occurence: June 2017
  15. Technology: Unknown
  16. Carbon Calculator: 0.70 gram CO2 per homepage visit
  17. Wikipedia: Which?
  18. Tested in: 2022 (details)
  19. Particularities / In summary: This speed test has a nice combination of the overall progress indicator and the progress indicators per test. It is hard to start a retest. Besides that the knockout criterion of 30 seconds was not met with 36 seconds, hence this speed test is not recommended.
 
Xfinity Speed Test
  1. https://speedtest.xfinity.com/URL: https://speedtest.xfinity.com/
  2. Recommended: No, the standard deviation is unintended large
  3. Download speed (50 Mbps): 50.9 ± 0.08 Mbps / 50.82..50.98 Mbps / 50 * 10^0 Mbps
  4. Download speed (75 Mbps): 79.2 ± 2.1 Mbps / 77.1..81.3 Mbps / 8 * 10^1 Mbps
  5. Download speed (100 Mbps): 103.4 ± 0.7 Mbps / 102.7..104.1 Mbps 10 * 10^1 Mbps
  6. Deviation from advertised download speed (75 Mbps): +5 Mbps
  7. Deviation from real download speed (84 Mbps): -4 Mbps
  8. Category: Ambiguous (on average 104% of the advertised speed)
  9. Time to complete: 20 seconds standard deviation 0 seconds
  10. Ads: NoNA
  11. Cookies: Yesnologin
  12. Accesibility: Some issues, Tingtun score: 99.29 anydevice,easystart,retest,install,quickfeedback
  13. Other information (at request): busy,download
    1. Upload speed
    2. Latency
  14. Company or owner: Comcast Corporation
  15. Business justification: By offering a realistic test Xfinity doesn have to deliver to much download speed
  16. Founded / first occurence: February 2016
  17. Technology: Unknown
  18. Carbon Calculator: 0.31 gram CO2 per homepage visit
  19. Wikipedia: Xfinity
  20. Tested in: 2021 and 2020 (details)
  21. Particularities / In summary: Xfinity was the number 2 speed test in the first speed test test of 2020.