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FairSpeed vs Breitbandmessung: catalog facts
FairSpeed	Breitbandmessung
Free Free and open source under the AGPL-3.0 licence.	Free Free public service of the Bundesnetzagentur.
Android	macOS, Android, Web
Measures latency, download and upload Uses independently-run test servers	Official measurement that can document underperforming contracts Compares measured speed against the contracted rate
New project with a small user base Android only	German-language and aimed at connections in Germany Contract compliance evidence relevant only to German providers
Downloadable app	Downloadable app, Web application
Open source	Closed source
License: AGPL-3.0-or-later	License not stated
Not stated if an account is 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 1, 2026

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