k6 vs Playwright(2026)
k6 is better for teams that need developer-friendly (js scripts). Playwright is the stronger choice if auto-waiting (no flaky tests). k6 is open-source (from $49/month (Grafana Cloud)) and Playwright is free.
Full feature breakdown, pricing details, and pros & cons below.
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k6
k6 is a modern load testing tool using JavaScript/TypeScript scripts to simulate thousands of virtual users hitting your APIs.
Starting at $49/month (Grafana Cloud)
Visit k6Playwright
Playwright enables reliable end-to-end testing for modern web apps across Chromium, Firefox, and WebKit.
Visit PlaywrightHow Do k6 and Playwright Compare on Features?
| Feature | k6 | Playwright |
|---|---|---|
| Pricing model | open-source | free |
| Starting price | $49/month (Grafana Cloud) | Free |
| Load & performance testing | ✓ | — |
| JavaScript scripting | ✓ | — |
| Thresholds & SLOs | ✓ | — |
| Browser testing | ✓ | — |
| Extensions | ✓ | — |
| Grafana integration | ✓ | — |
| Cross-browser testing | — | ✓ |
| Auto-wait | — | ✓ |
| Network interception | — | ✓ |
| Trace viewer | — | ✓ |
| Component testing | — | ✓ |
| API testing | — | ✓ |
k6 Pros and Cons vs Playwright
k
k6
+Developer-friendly (JS scripts)
+Low resource usage
+Excellent metrics output
+Built-in Grafana integration
−Not for UI testing
−Limited to load/perf scenarios
−Extensions can be complex
P
Playwright
+Auto-waiting (no flaky tests)
+Multi-browser support
+Trace viewer debugging
+Fast parallel execution
−Heavier than Cypress for simple tests
−Learning curve
−Slower test authoring
Should You Use k6 or Playwright?
Choose k6 if…
- •Developer-friendly (JS scripts)
- •Low resource usage
- •Excellent metrics output
Choose Playwright if…
- •Auto-waiting (no flaky tests)
- •Multi-browser support
- •Trace viewer debugging