The speed test overview

Based on the following speed test tests of 2022, 2021, 2020 updated and 2020 and additional research, for example with the Website Carbon Calculator, the following overview has been made per speed test.

  1. Bandwidth Place
  2. Bredbandskollen
  3. Broadband Internet Speed test
  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. Open Speed Test
  19. RCN
  20. SamKnows Speed Test
  21. SpeedOf.me
  22. SpeedSmart
  23. Speedtest4.php
  24. Testmy.net
  25. Toast
  26. Which Broadband Checker
  27. Xfinity Speed Test
 
Bandwidth Place
  1. URL: https://www.bandwidthplace.com/
  2. Recommended: No, the median is below the expected correct value
  3. Measured download speed: 70.00 ± 0.07 Mbps / 69.93..70.07 Mbps / 70 * 10^0 Mbps
  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: 15 seconds standard deviation 4 seconds
  8. Ads: Yes
  9. Cookies: Yes
  10. Accesibility: WCAG 2.0 (level A)
  11. Other information:
    1. Progress indicator per test
    2. Upload speed
    3. Ping time
  12. Company or owner: Bandwidth Place LLC
  13. Business justification: Ability to get in touch with potential customers for a new internet subscription
  14. Technology: Unknown
  15. Carbon Calculator: 0.78 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2021 and 2020 (details)
  18. Particularities / In summary: Bandwidth Place is a fast easy to use conservative speed test. It is a good alternative for Fast.
 
Bredbandskollen
  1. URL: https://www.bredbandskollen.se/en/
  2. Recommended: No, the median is somewhere between the advertised speed and the actual speed
  3. Measured download speed: 77.50 ± 0.20 Mbps / 77.30..77.70 Mbps / 77 * 10^0 Mbps
  4. Deviation from advertised download speed (75 Mbps): +2 Mbps
  5. Deviation from real download speed (84 Mbps): -11 Mbps
  6. Category: Mainstream
  7. Time to complete: 22 seconds standard deviation 0.4 seconds
  8. Ads: No
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    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. Technology: Sending messages of meaningless data between the web browser and the measurement server via web sockets (protocol ws://)
  15. Carbon Calculator: 0.21 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2022 (details)
  18. 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.
 
Broadband Internet Speed test
  1. URL: http://speedtest.raketforskning.com/internet-speed-test.html
  2. Recommended: No, no results
  3. Measured download speed: Unable to produce a report. No data for download speed available.
  4. Deviation from advertised download speed (75 Mbps): NA
  5. Deviation from real download speed (84 Mbps): NA
  6. Category: NA
  7. Time to complete: NA
  8. Ads: Yes
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information: NA
  12. Company or owner: Voidsoft AB
  13. Business justification: Unknown
  14. Technology: Unknown
  15. Carbon Calculator: 0.24 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2022
  18. Particularities / In summary: This speedtest seems to have an unique approach, however it isn't working at all.
 
Broadband Speed Checker
  1. URL: https://www.broadbandspeedchecker.co.uk/
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Measured download speed: 76.05 ± 1.34 Mbps / 74.71..77.39 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: Mainstream
  7. Time to complete: 36 seconds standard deviation 0.5 seconds
  8. Ads: Yes
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    1. Progress indicator per test
    2. Upload speed
    3. Ping time
  12. Company or owner: Speedchecker Ltd
  13. Business justification: Filling their Speed test datasets
  14. Technology: HTML5
  15. Carbon Calculator: 0.82 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2022 (details) and 2021
  18. 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. URL: https://speed.cloudflare.com/
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Measured download speed: 75.2 ± 1.1 Mbps / 74.1..76.3 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: Mainstream
  7. Time to complete: 56 seconds standard deviation 1 seconds
  8. Ads: No
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    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
  12. Company or owner: Cloudflare, Inc.
  13. Business justification: Promote the power of Cloudflare Workers
  14. Technology: Cloudflare Workers
  15. Carbon Calculator: 1.78 gram CO2 per homepage visit. Note the test starts immediately and automatically
  16. Wikipedia: Cloudflare
  17. Tested in: 2022 (details) and 2021
  18. 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. URL: https://comparespeedtest.net/
  2. Recommended: No, the standard deviation is unintended large
  3. Measured download speed: 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: Realistic
  7. Time to complete: 25 seconds standard deviation 0 seconds
  8. Ads: Yes
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    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. Technology: HTML5
  15. Carbon Calculator: 3.56 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2022 (details)
  18. 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. 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. Measured download speed: 81.09 ± 1.40 Mbps / 79.69..82.49 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: Realistic
  7. Time to complete: 21 seconds standard deviation 0 seconds
  8. Ads: No
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    1. Upload speed
    2. Ping time
  12. Company or owner: Comparitech Limited
  13. Business justification: Extra visitors and referral fees
  14. Technology: Unknown (Not Flash)
  15. Carbon Calculator: 0.22 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2021 and 2020 (details), second test (details)
  18. 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. URL: http://www.dslreports.com/speedtest
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Measured download speed: 76.2 ± 0.7 Mbps / 75.5..76.9 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: Mainstream
  7. Time to complete: 64 seconds standard deviation 2 seconds
  8. Ads: Yes
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    1. A graph of the download speed
    2. Upload speed
    3. A graph of the upload speed
  12. Company or owner: DSLReports.com / SilverMatrix9 Corp
  13. Business justification: Attract visitors interested in a new ISP broadband contract, sell ads
  14. Technology: Multi-stream HTML5 speed test
  15. Carbon Calculator: 0.82 gram CO2 per homepage visit
  16. Wikipedia: DSLReports
  17. Tested in: 2022 (details), 2021 and 2020 (details)
  18. 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. URL: https://fast.com/
  2. Recommended: No, the median is below the expected correct value
  3. Measured download speed: 69 ± 5 Mbps / 64..74 Mbps / 7 * 10^1 Mbps
  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: 32 seconds standard deviation 12 seconds
  8. Ads: No
  9. Cookies: No
  10. Accesibility: Some issues
  11. Other information:
    1. Upload speed
    2. Latency uploaded
    3. Latency loaded
  12. Company or owner: Netflix, Inc.
  13. Business justification: Fast is a selfservice tool for Nexflix users to detect if they have internet problems
  14. Technology: Described at Building fast.com
  15. Carbon Calculator: 0.04 gram CO2 per homepage visit
  16. Wikipedia: Netflix
  17. Tested in: In 2022 (see above), 2021 and 2020 (details)
  18. 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. URL: https://www.fireprobe.net/en
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Measured download speed: 76.33 ± 0.12 Mbps / 76.21..76.45 Mbps / 76 * 10^0 Mbps
  4. Deviation from advertised download speed (75 Mbps): +1 Mbps
  5. Deviation from real download speed (84 Mbps): -8 Mbps
  6. Category: Mainstream
  7. Time to complete: 35 seconds standard deviation 0.4 second
  8. Ads: No
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    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
  12. Company or owner: V-SPEED Sp. z o.o.
  13. Business justification: Selling speed tests to ISP's and ads
  14. Technology: HTML5
  15. Carbon Calculator: 0.51 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2022 (details), 2021 and 2020 (details)
  18. 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. URL: http://speedtest.googlefiber.net/
  2. Recommended: Yes
  3. Measured download speed: 76.3 ± 0.4 Mbps / 75.9..76.7 Mbps / 76 * 10^0 Mbps
  4. Deviation from advertised download speed (75 Mbps): +1 Mbps
  5. Deviation from real download speed (84 Mbps): -8 Mbps
  6. Category: Mainstream
  7. Time to complete: 16 seconds standard deviation 0.5 seconds
  8. Ads: No
  9. Cookies: No
  10. Accesibility: Some issues
  11. Other information:
    1. Upload speed
    2. Ping
  12. Company or owner: Google Fiber Inc.
  13. Business justification: Promoting Google Fiber. A high-speed broadband internet service that uses fiber optic cable to deliver fast internet
  14. Technology: Unknown
  15. Carbon Calculator: 0.15 gram CO2 per homepage visit
  16. Wikipedia: Google Fiber
  17. Tested in: 2022 (details), 2021 and 2020 (details)
  18. 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. URL: https://speedtest.zomdir.com/
  2. Recommended: Yes
  3. Measured download speed: 50..100 Mbps
  4. Deviation from advertised download speed (75 Mbps): 25..25 Mbps
  5. Deviation from real download speed (84 Mbps): -34..+16 Mbps
  6. Category: Realistic and Conservative
  7. Time to complete: 1 seconds standard deviation 0 seconds
  8. Ads: No
  9. Cookies: No
  10. Accesibility: WCAG 2.0 (level A)
  11. Other information:
    1. Latency
  12. Company or owner: Hans van der Graaf
  13. Business justification: None, ZOMDir is a hobby project
  14. Technology: Described at The power of Internet Speed at a Glance
  15. Carbon Calculator: 0.30 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2021 and 2020 (details), second test (details)
  18. 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 measured 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. URL: https://librespeed.org/
  2. Recommended: No, the median is somewhere between the advertised speed and the actual speed
  3. Measured download speed: 80.8 ± 0.3 Mbps / 80.5..81.1 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: Realistic
  7. Time to complete: 23 seconds standard deviation 0 seconds
  8. Ads: No
  9. Cookies: No
  10. Accesibility: Some issues
  11. Other information:
    1. Upload speed
    2. Ping
    3. Jitter
  12. Company or owner: Federico Dossena
  13. Business justification: LibreSpeed is part of Federico's portfolio
  14. Technology: Javascript, using XMLHttpRequest and Web Workers. LibreSpeed is available at Github
  15. Carbon Calculator: 0.03 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2021 and 2020 (details)
  18. 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. URL: https://speed.measurementlab.net/
  2. Recommended: Yes
  3. Measured download speed: 76.11 ± 0.04 Mbps / 76.07..76.15 Mbps / 761 * 10^-1 Mbps
  4. Deviation from advertised download speed (75 Mbps): +1.1 Mbps
  5. Deviation from real download speed (84 Mbps): -7.9 Mbps
  6. Category: Mainstream
  7. Time to complete: 21 seconds standard deviation 0 seconds
  8. Ads: No
  9. Cookies: No
  10. Accesibility: Some issues
  11. Other information:
    1. Progress indicator
    2. Upload speed
    3. Latency
  12. 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
  13. 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
  14. 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
  15. Carbon Calculator: 0.23 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2022 (details), 2021 and 2020 (details)
  18. 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. URL: https://www.meter.net/
  2. Recommended: No, the median is below the expected correct value
  3. Measured download speed: 73.79 ± 1.50 Mbps / 72.29..75.29 Mbps / 7 * 10^1 Mbps
  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: 24 seconds standard deviation 1 second
  8. Ads: Yes
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    1. Progress indicator
    2. A graph of the download speed
    3. Upload speed
    4. A graph of the upload speed
    5. Ping
    6. Jitter
  12. Company or owner: Adam Haken European VAT number: CZ8106023189 (A check with VIES is possible)
  13. Business justification: Probably ads
  14. Technology: Unknown
  15. Carbon Calculator: 0.27 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2022 (details) and 2021
  18. Particularities / In summary: Meter.net has a long history. It is a 'sympatic' speedtest. 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. URL: https://www.nperf.com/en/
  2. Recommended: No, the median is somewhere between the advertised speed and the actual speed
  3. Measured download speed: 77.37 ± 0.21 Mbps / 77.16..77.58 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: Realistic
  7. Time to complete: 70 seconds standard deviation 1 seconds
  8. Ads: No
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    1. Progress indicator per test
    2. A graph of the download speed
    3. Upload speed
    4. A graph of the upload speed
    5. Latency
    6. Jitter
  12. 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)
  13. Business justification: Selling nPerf raw data and nominating ISPś worldwide as independent tester
  14. Technology: HTML5 and JavaScript
  15. Carbon Calculator: 0.44 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2021
  18. 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. URL: https://www.speedtest.net/
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Measured download speed: 76.17 ± 0.12 Mbps / 76.05..76.29 Mbps / 76 * 10^0 Mbps
  4. Deviation from advertised download speed (75 Mbps): +1 Mbps
  5. Deviation from real download speed (84 Mbps): -8 Mbps
  6. Category: Mainstream
  7. Time to complete: 39 seconds standard deviation 1 seconds
  8. Ads: Yes
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    1. Progress indicator per test
    2. A graph of the download speed
    3. Upload speed
    4. A graph of the upload speed
    5. Ping
  12. Company or owner: Ookla, LLC is an independently operating subsidiary of Ziff Davis
  13. Business justification: Selling speed tests to ISP's
  14. Technology: HTML5
  15. Carbon Calculator: 1.86 gram CO2 per homepage visit
  16. Wikipedia: Speedtest.net
  17. Tested in: 2022 (details), 2021 and 2020 (details)
  18. 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.
 
Open Speed Test
  1. URL: http://openspeedtest.com/
  2. Recommended: No, the median is somewhere between the advertised speed and the actual speed
  3. Measured download speed: 79.26 ± 0.55 Mbps / 78.71..79.81 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: Realistic
  7. Time to complete: 35 seconds standard deviation 0 seconds
  8. Ads: Yes
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    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
  12. Company or owner: Unknown
  13. Business justification: Selling ads
  14. Technology: JavaScript and HTML5
  15. Carbon Calculator: 0.50 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2021
  18. Particularities / In summary: Open Speed Test is not recommended. The website is not mobile friendly and the knockout criterion of 30 seconds is not met. Open Speed Test 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
 
RCN
  1. URL: http://md.speedtest.rcn.net/
  2. Recommended: No, the standard deviation is unintended large
  3. Measured download speed: 77 ± 5 Mbps / 72..82 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: Realistic
  7. Time to complete: 27 seconds standard deviation 0 seconds
  8. Ads: No
  9. Cookies: No
  10. Accesibility: Some issues
  11. Other information:
    1. Progress indicator
  12. Company or owner: Stonepeak Infrastructure Partners owns Astound Broadband which is an US cable operator group to which R C N Corp. belongs
  13. Business justification: Probably was this speed test a service for the customers of RCN
  14. Technology: Unknown
  15. Carbon Calculator: 2.15 gram CO2 per homepage visit
  16. Wikipedia: Astound Broadband and RCN Corporation
  17. Tested in: 2021
  18. Particularities / In summary: The RCN 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 cloned as Astound Broadband
 
SamKnows Speed Test
  1. URL: http://www.broadbandperformance.co.uk/
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Measured download speed: 76.4 ± 0.0 Mbps / 76.4 Mbps / 764 * 10^-1 Mbps
  4. Deviation from advertised download speed (75 Mbps): +1.4 Mbps
  5. Deviation from real download speed (84 Mbps): -7.6 Mbps
  6. Category: Mainstream
  7. Time to complete: 42 seconds standard deviation 2 seconds
  8. Ads: No
  9. Cookies: No
  10. Accesibility: Some issues
  11. Other information:
    1. Upload speed
    2. Latency
  12. Company or owner: SamKnows Limited
  13. Business justification: It is probably an example of the tools created by SamKnows
  14. Technology: Unknown
  15. Carbon Calculator: 0.66 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2022 (details), 2021 and 2020 (details)
  18. 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
 
SpeedOf.me
  1. URL: https://speedof.me/
  2. Recommended: No, the test takes to long (> 30 seconds) to complete
  3. Measured download speed: 83.50 ± 0.05 Mbps / 83.45..83.55 Mbps / 84 * 10^0 Mbps
  4. Deviation from advertised download speed (75 Mbps): +9 Mbps
  5. Deviation from real download speed (84 Mbps): 0 Mbps
  6. Category: Realistic
  7. Time to complete: 51 seconds standard deviation 1 second
  8. Ads: Yes
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    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
  12. Company or owner: Speed Of Me, LLC
  13. Business justification: Ads and promoting and selling the SpeedOf.Me API
  14. Technology: JavaScript and HTML5
  15. Carbon Calculator: 1.01 gram CO2 per homepage visit
  16. Wikipedia: Speedof.me
  17. Tested in: 2021 and 2020 (details), second test (details)
  18. 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.
 
SpeedSmart

The result page of the SpeedSmart speed test

  1. URL: https://speedsmart.net/
  2. Recommended: Yes
  3. Measured download speed: 75.37 ± 0.20 Mbps / 75.17.. 75.57 Mbps / 75 * 10^0 Mbps
  4. Deviation from advertised download speed (75 Mbps): 0 Mbps
  5. Deviation from real download speed (84 Mbps): -9 Mbps
  6. Category: Mainstream
  7. Time to complete: 27 seconds standard deviation 0 seconds
  8. Ads: No
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    1. Progress indicator per test
    2. Upload speed
    3. Ping
  12. Company or owner: VeeApps
  13. Business justification: Ads in Apps (the website promotes the apps)
  14. Technology: HTML5
  15. Carbon Calculator: 0.44 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2022 (details), 2021 and 2020 (details), second test (details)
  18. Particularities / In summary: SpeedSmart is a decent speed test. It was number 4 in 2020 (updated) and number 3 in 2022.
 
Speedtest4.php
  1. URL: https://isp.haydont.net/speedtest4.php
  2. Recommended: No, no meaningfull results
  3. Measured download speed: Very inaccurate
  4. Company or owner: Emmanuel Haydont
  5. Business justification: Unknown
  6. Technology: PHP
  7. Carbon Calculator: 1.71 gram CO2 per homepage visit
  8. Wikipedia: No
  9. Tested in: NA, in 2020 and 2021 it was concluded that there are no meaningful results.
  10. Particularities / In summary: This speed test is not recommended. This speed test is outdated and very inaccurate
 
Testmy.net
  1. URL: https://testmy.net/
  2. Recommended: No, the median is below the expected correct value
  3. Measured download speed: 36.3 ± 0.9 Mbps / 35.4..37.2 Mbps / 4 * 10^1 Mbps
  4. Deviation from advertised download speed (75 Mbps): -35 Mbps
  5. Deviation from real download speed (84 Mbps): -44 Mbps
  6. Category: Conservative
  7. Time to complete: 25 seconds standard deviation 4 seconds
  8. Ads: Yes
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    1. A graph of the download speed
    2. Upload speed
  12. Company or owner: TestMy Net LLC
  13. Business justification: Ads
  14. Technology: Unknown
  15. Carbon Calculator: 0.71 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2022 (details) and 2021
  18. 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. URL: https://performance.toast.net/
  2. Recommended: No, the standard deviation is unintended large
  3. Measured download speed: 71.2 ± 8.1 Mbps / 63.1..79.3 Mbps / 60..80 Mbps
  4. Deviation from advertised download speed (75 Mbps): -15..+5 Mbps
  5. Deviation from real download speed (84 Mbps): -24..-4 Mbps
  6. Category: Conservative
  7. Time to complete: 10 seconds standard deviation 2 seconds
  8. Ads: Yes
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    1. None
  12. Company or owner: TOAST.NET LEASING, LLC.
  13. Business justification: Ads
  14. Technology: Measure the time to download a large image
  15. Carbon Calculator: 1.23 gram CO2 per homepage visit
  16. Wikipedia: No
  17. Tested in: 2021, 2020 and second test
  18. 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. URL: https://broadbandtest.which.co.uk/
  2. Recommended: No, the median is below the expected correct value
  3. Measured download speed: 72.1 ± 1.0 Mbps / 71.1..73.1 Mbps / 7 * 10^1 Mbps
  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: 36 seconds standard deviation 0 seconds
  8. Ads: No
  9. Cookies: Yes
  10. Accesibility: Probably some issues
  11. Other information:
    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. Technology: Unknown
  15. Carbon Calculator: 0.70 gram CO2 per homepage visit
  16. Wikipedia: Which?
  17. Tested in: 2022 (details)
  18. 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. URL: https://speedtest.xfinity.com/
  2. Recommended: No, the standard deviation is unintended large
  3. Measured download speed: 79.2 ± 2.1 Mbps / 77.1..81.3 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: Realistic
  7. Time to complete: 20 seconds standard deviation 0 seconds
  8. Ads: No
  9. Cookies: Yes
  10. Accesibility: Some issues
  11. Other information:
    1. Upload speed
    2. Latency
  12. Company or owner: Comcast Corporation
  13. Business justification: By offering a realistic test Xfinity doesn have to deliver to much download speed
  14. Technology: Unknown
  15. Carbon Calculator: 0.31 gram CO2 per homepage visit
  16. Wikipedia: Xfinity
  17. Tested in: 2021 and 2020 (details)
  18. Particularities / In summary: Xfinity was the number 2 speed test in the first speed test test of 2020.