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OONI Probe vs FairSpeed: catalog facts
OONI Probe	FairSpeed
Free Free and open source.	Free Free and open source under the AGPL-3.0 licence.
Windows, macOS, Android, iOS	Android
Tests blocking of websites and messaging apps Includes network speed and performance tests	Measures latency, download and upload Uses independently-run test servers
Running censorship tests can carry risk in some countries Measurements are published openly	New project with a small user base Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	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 October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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