The open-source workhorse: every protocol, a GUI, and twenty-five years of plugins.
JMeter is a Java load-testing application with a desktop GUI for building test plans and a CLI for execution. Its distinguishing feature is protocol breadth — HTTP, JDBC, JMS, LDAP, SMTP, FTP, TCP and more — plus a large plugin ecosystem. It is free, ubiquitous in enterprise QA, and the tool most performance testers learned first.
Best for
Free and open source
Open sourceFree tier: Everything, self-hosted
What drives the bill: Free. Costs are load-generator infrastructure and, commonly, a cloud execution service such as BlazeMeter.
Check current pricing on Apache Software Foundation’s siteFigures are indicative and were last reviewed August 2026. Vendors change pricing often; confirm before you commit.
No reviews of Apache JMeter yet. If you have used it in anger, yours would be the first.
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