Compare VegaLoad
Most teams already know k6, JMeter, Locust or Gatling. This section shows how VegaLoad is different. It also says where another tool is the better choice.
We try to be fair. If a tool does something better, we say so.
The short version
| If you need... | Look at |
|---|---|
| One binary that tests HTTP, gRPC, databases, queues, FTP and SFTP, with an agent that can run it safely | VegaLoad |
| Browser tests, a large extension ecosystem, or Grafana Cloud | k6 |
| A GUI to build test plans, a recorder, and many years of plugins | JMeter |
| Tests in plain Python and a live web UI | Locust |
| A typed SDK in Java, Kotlin, Scala or JavaScript, and a vendor-run platform for large distributed load | Gatling |
| One HTTP endpoint at a steady rate, from one command | vegeta, oha and similar |
Coming from another tool? Read Moving to VegaLoad.
What is not a difference
These are true of VegaLoad. They are also true of other tools, so we do not count them as reasons to switch.
- A single binary. k6 is one binary too.
- A self-contained HTML report. k6, Locust, JMeter and Gatling can all produce one.
- Pass or fail limits. k6 has thresholds. Gatling has assertions. Locust can set its exit code from a short snippet.
- Tests as code. All of these tools can keep tests in your repository.
- AI agent support. k6 has an official MCP server in preview. Gatling has one for Gatling Enterprise. Community servers exist for JMeter and Locust. See each page.
What is different
- Many protocols in one binary. VegaLoad has 14 built in: HTTP/1.1, HTTP/2, gRPC, WebSocket, MQTT, Kafka, PostgreSQL, MySQL, Redis, RabbitMQ, FTP, SFTP, TCP and UDP.
- A first run with no script.
vegaload run -target ... -protocol ...is one command. The other tools start from a script, a test plan, or a simulation file. - A local agent loop with a guard. The MCP server is in the same binary. Your agent can only test hosts you approve, and every run is written to an audit log on your machine.
- A path to Harness. When you need distributed load, shared history and chaos probes, Harness Resilience Testing is the next step. The bridge is planned. It is not released yet.
How we check these pages
- Every fact comes from the tool's own documentation or repository. The page lists its sources.
- Each page shows the date we checked and the version we read.
- We ran the example test on VegaLoad, k6 and Locust. We did not run JMeter or Gatling, and those pages say so.
- We do not publish speed comparisons. A fair benchmark is a project of its own.
Tools change. If you see something out of date or wrong, please open an issue and we will fix it.