# JMeter vs k6

> Apache JMeter is a Java GUI and plugin ecosystem for multi-protocol load tests. Grafana k6 is a code-first JavaScript tool with strong developer workflows and cloud options. Choose JMeter for broad protocols and recorder/GUI teams; choose k6 for CI-native JS scripts and modern observability.

- Canonical: https://perf.jmeter.ai/vs/apache-jmeter-vs-grafana-k6/
- Compared: [Apache JMeter](https://perf.jmeter.ai/tools/apache-jmeter/) · [Grafana k6](https://perf.jmeter.ai/tools/grafana-k6/)

## Verdict
JMeter remains the default when you need protocol breadth, GUI authoring, or a large plugin market. k6 wins when teams want version-controlled JS/TS scenarios, clean thresholds, and a straight path into Grafana Cloud. Many organizations run both: JMeter for legacy and enterprise protocols, k6 for API and platform services.

## Specs
| Field | JMeter | k6 |
| --- | --- | --- |
| Vendor | Apache Software Foundation | Grafana Labs |
| Category | Load Testing | Load Testing |
| License | Open Source | Open Source |
| Deployment | Self-hosted | Self-hosted |
| Status | Active | Active |
| First released | 1998 | 2017 |
| Pricing | Free; Apache License 2.0. | Free; AGPL-3.0 license. |
| Scripting | Java, Groovy | JavaScript, TypeScript |
| Protocols | HTTP, HTTPS, JDBC, JMS, FTP, TCP | HTTP, HTTPS, WebSocket, gRPC |
| OS support | Windows, macOS, Linux | Windows, macOS, Linux |

## How to choose
- Pick JMeter if non-developers must record and edit plans in a GUI.
- Pick k6 if your team already lives in JavaScript/TypeScript and Git.
- Prefer JMeter when you need JDBC, JMS, FTP, or heavy plugin coverage.
- Prefer k6 for API-first services with clear SLOs and CI gates.
- Consider cloud: BlazeMeter/OctoPerf/Azure for JMeter; Grafana Cloud k6 for k6.
- Use the Test Rig to compare license, deployment, and protocol rows side by side.

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Curated by NaveenKumar Namachivayam (QAInsights) · methodology: https://perf.jmeter.ai/about/#methodology · corrections: https://github.com/QAInsights/Performance-Testing-Tools/issues/new?title=Tool%20submission%3A%20&body=Tool%20name%3A%20%0AOfficial%20URL%3A%20%0AWhat%20should%20be%20added%20or%20corrected%3F%20%0A