Gatling vs Vegeta

From €89 per month (indicative, Enterprise Cloud entry)

Free and open source

Open source is free; Enterprise adds distributed injectors and reporting, billed by virtual-user-hours.

Free and open source. You pay in engineering time and CI minutes.

Gatling open source is complete for single-machine load generation.

Everything, self-hosted

Widely used

Gatling Corp · since 2012

Established

OSS community · since 2013

• Very high throughput per load generator thanks to the async architecture.
• Code-first scenarios that review, diff and refactor properly.
• The default HTML report is genuinely good enough to hand to a stakeholder.

• Constant-rate model avoids the coordinated-omission problem that distorts VU-based tools.
• Single static binary, trivial to run anywhere.
• Composable output for scripting and pipelines.

• Historically Scala-first; the Java and JavaScript DSLs are newer and less documented.
• Fewer protocols than JMeter.
• Distributed load without the enterprise product means building your own orchestration.

• No scenarios or session state — one target list, one rate.
• No GUI or built-in reporting beyond plots.
• Go library usage required for anything sophisticated.

JVM teams wanting code-first performance tests with excellent reporting.

Backend engineers who want rigorous constant-rate measurements of an endpoint.