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Plow vs Siege: catalog facts
Plow	Siege
Free Free and open source under the Apache 2.0 licence.	Free Free and open source.
Windows, Command line	macOS, Linux, Command line
Real-time metrics in both terminal and browser Uses fasthttp for high request rates	Tests many URLs at once from a list Configurable number of simulated users
Tests HTTP endpoints only Should only be pointed at servers you are allowed to load test	Command line only, with no graphical reports Scripting options are simpler than in newer load testers
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-3.0
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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