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Breitbandmessung vs M-Lab Speed Test: catalog facts
Breitbandmessung	M-Lab Speed Test
Free Free public service of the Bundesnetzagentur.	Free Free to use in the browser.
macOS, Android, Web	Web
Official measurement that can document underperforming contracts Compares measured speed against the contracted rate	Reports retransmission as well as speed and latency Openly licensed measurement tools
German-language and aimed at connections in Germany Contract compliance evidence relevant only to German providers	Your IP address is retained and published with the results Fewer extras than commercial speed tests
Downloadable app, Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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