STATIC COMPARISON / TIER A
k6 vs Gatling
Answer k6 and Gatling are both code-first load tools. k6 centers on JavaScript with Grafana ecosystem hooks; Gatling centers on a high-performance engine with scenario DSLs and enterprise options. Pick k6 for JS teams and Grafana; Gatling for JVM-oriented performance groups seeking engine efficiency.
Curator verdict
This is often a language and ecosystem choice more than a capability cliff. k6 integrates naturally with modern frontend/backend JS shops and Grafana Cloud. Gatling remains popular in enterprises that standardize on JVM performance engineering and Gatling Enterprise packaging.
Spec matrix
| Field | Grafana k6 | Gatling |
|---|---|---|
| Vendor | Grafana Labs | Gatling Corp. |
| Category | Load Testing | Load Testing |
| License | Open Source | Open Source |
| Deployment | Self-hosted | Self-hosted |
| Status | Active | Active |
| First released | 2017 | 2012 |
| Pricing | Free; AGPL-3.0 license. | Free open-source core; commercial platform available. |
| Scripting | JavaScript, TypeScript | Java, Scala, Kotlin |
| Protocols | HTTP, HTTPS, WebSocket, gRPC | HTTP, HTTPS, WebSocket, SSE, JMS |
| OS support | Windows, macOS, Linux | Windows, macOS, Linux |
How to choose
- Prefer k6 if JavaScript/TypeScript is the team default.
- Prefer Gatling if you already invest in JVM performance tooling.
- Compare cloud paths: Grafana Cloud k6 vs Gatling Enterprise.
- Check protocol needs; both are strong on HTTP-family workloads.
- Run a two-week POC on the same API with thresholds both sides can enforce.
Need more than two tools or a shareable matrix? Use the live Test Rig from the directory compare tray.
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