k6
AGPL-3.0 scriptable load testing (JS) from Grafana
Observability / Load Testing · AGPL-3.0 · 32k
Reviewed 2026-09-13 · last push 2026-10-19 · repo checked 2026-10-19
What's Good
AGPL-3.0. grafana/k6. Go engine, JavaScript/TypeScript test scripts, checks/thresholds, CLI + CI. Docs at k6.io / grafana.com/docs/k6. Unmodified internal CLI/CI use is the free path — you run the binary on your machines.
The Catch
AGPL-3.0 network/copyleft — modifications you serve or distribute can trigger source obligations; do not treat k6 as MIT. Grafana Cloud k6 is a separate paid hosted product (execution, analysis, collaboration). Vs oha (MIT TUI hammer): k6 is the *scripted/scenario* suite, not a live ratatui chart. Point it at staging you own.
Verdict
AGPL-3.0 scriptable load. Free unmodified CLI/CI; Cloud k6 is the paid seat.
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