Compare software

Flent vs iPerf 2: catalog facts
Flent	iPerf 2
Free Free to download and use, with the source published on GitHub.	Free Free to download from SourceForge.
Linux, Command line	Android, Command line
Repeatable aggregate tests built on netperf and iperf Interactive GUI and extensive plotting	Measures latency, jitter and responsiveness as well as throughput Multicast, bidirectional and full-duplex testing
Needs netperf or iperf and a test server on the other end Aimed at technical users rather than a quick speed check	Command-line only on desktop Not wire-compatible with iperf3, which can cause confusion
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
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.