k6

Modern load testing tool for developers

⭐ 4.6/5 (2500 reviews)

About k6

k6 by Grafana Labs is a developer-centric load testing tool using JavaScript scripts. Test APIs, microservices, and websites at scale.

Key Features

  • JavaScript scripts
  • CLI-first
  • Thresholds
  • Grafana integration
  • Browser testing
  • Cloud execution

✅ Pros

  • Developer-friendly
  • Great scripting
  • Grafana integration
  • Open source

❌ Cons

  • JavaScript only
  • Limited protocol support
  • Cloud costs for scale
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