This is an overview of accurate speed tests. That is, the speed tests are displayed on the descending accuracy score as determined by the standardized speed test. The accuracy score is listed in brackets after the speed test.
Note that which speed test is most accurate depends on the speed test you measure. For this list we tested with an advertised speed of 100 Mbps.
- M-Lab (100) Mainstream Tip
- Ookla Speedtest (100) Mainstream Pop
- RealSpeed (100) Mainstream Tip
- Think Broadband (the standalone version) (100) Mainstream
- Fireprobe (98) Mainstream
- Google Fiber (97) Mainstream Tip
- Meter.net (97) Mainstream
- Samknows (original) (97) Mainstream
- Xfinity Speed Test (97) Mainstream
- Cloudflare (96) Pop
- TestMy.net (96) Tip
- Astound (94) Mainstream
- SpeedSmart (94) Mainstream
- nPerf (92) Mainstream
- Bredbandskollen (91)
- Comcast Business Internet Speed Test (88)
- Broadband Speed Checker (86)
- HighSpeedInternet (86) M-Lab
- SpeedOf.me (83) Realistic Pop
- SpeedOf.me API sample page (81) Realistic Tip
- DSLReports (81) Mainstream
- U Switch (77)
- Speedcheck™ (75)
- IPv4 - HTML5 Speedtest (52)
- OpenSpeedTest™ (38)
- Bandwidth Place (20)
- Comparitech (20)
- Fast (20) Pop
- Internet Speed at a Glance (20) Tip
- IPv4 / IPv6 - HTML5 Speedtest (20)
- IPv6 - HTML5 Speedtest (20)
- IPv6 Test (20)
- LibreSpeed (20)
- Speedtest4.php (20)
- Toast (20)
- Verizon (20)
- Which Broadband Checker (20)