compare
iperf vs LibreSpeed
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | iperf | LibreSpeed |
|---|---|---|
| Language | C | JavaScript |
| Licence | Other | LGPL-3.0 |
| Stars | 8.8k | 15k |
| Latest | 3.22 | v6.3.0 |
| Last push | 2026-10-09 | 2026-09-27 |
| Release cadence | about 129 days between releases | about 26 days between releases |
| Active contributors | 6 commit authors on the default branch in the last 90 days | 7 commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Speedtest by Ookla. Alternatives to Speedtest by Ookla →
PartialiperfThroughput tests between two hosts you control; no public server network.
PartialLibreSpeedMeasures download, upload, ping and jitter to a server you host, not to a global network of test servers.
iperf
unsigned The latest release, 3.22, carries no signature GitHub could verify.
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LibreSpeed
unsigned The latest release, v6.3.0, carries no signature GitHub could verify.
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