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Flent vs Waveform Bufferbloat Test: catalog facts
Flent	Waveform Bufferbloat Test
Free Free to download and use, with the source published on GitHub.	Free The test runs in the browser at no cost.
Linux, Command line	Web
Repeatable aggregate tests built on netperf and iperf Interactive GUI and extensive plotting	Measures latency under load, not only raw speed Runs in the browser with nothing to install
Needs netperf or iperf and a test server on the other end Aimed at technical users rather than a quick speed check	Hosted on a retailer's site Tests only the connection from the device running it
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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