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nPerf vs Breitbandmessung: catalog facts
nPerf	Breitbandmessung
Free The web speed test is free to run.	Free Free public service of the Bundesnetzagentur.
Windows, macOS, Android, iOS, Web	macOS, Android, Web
Measures download, upload and latency Apps for mobile and desktop as well as the web	Official measurement that can document underperforming contracts Compares measured speed against the contracted rate
Not open source Tests against nPerf's own servers only	German-language and aimed at connections in Germany Contract compliance evidence relevant only to German providers
Downloadable app, Web application	Downloadable app, Web application
Closed source	Closed source
License not stated	License not stated
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 1, 2026

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