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M-Lab Speed Test vs FairSpeed: catalog facts
M-Lab Speed Test	FairSpeed
Free Free to use in the browser.	Free Free and open source under the AGPL-3.0 licence.
Web	Android
Reports retransmission as well as speed and latency Openly licensed measurement tools	Measures latency, download and upload Uses independently-run test servers
Your IP address is retained and published with the results Fewer extras than commercial speed tests	New project with a small user base Android only
Web application	Downloadable app
Closed source	Open source
License not stated	License: AGPL-3.0-or-later
No account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.