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Head-to-head · Performance Testing Software

Grafana k6 vs Xceptance LoadTest

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Grafana k6 #1 in Performance Testing Software 9.3/10 Free plan · 14-day trial Free planFree trial✓ 5 of 5 features Visit Grafana k6
Xceptance LoadTest #20 in Performance Testing Software 7.4/10 Free plan Free plan✓ 4 of 5 features Visit Xceptance

Grafana k6 leads on 0 checks, Xceptance LoadTest on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreGrafana k6 · 9.3/10
  • Free planboth
  • Free trialonly Grafana k6
  • Most featuresGrafana k6 · 5 of 5

Grafana k6 scores higher on our rubric for performance testing software: 9.3 against 7.4 out of 10; our editors rank them #1 and #20.

Grafana k6 is the better fit for open-source teams building scripted test suites. Xceptance LoadTest is the better fit for java teams wanting open-source browser testing.

  • Grafana k6 fits best

    Open-source teams building scripted test suites

  • Xceptance LoadTest fits best

    Java teams wanting open-source browser testing

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Side by side

Feature Grafana k6 9.3/10 Visit ↗ Xceptance LoadTest 7.4/10 Visit ↗
At a glance
Editor score 9.3 7.4
Ranking #1 in Performance Testing Software #20 in Performance Testing Software
Best for Open-source teams building scripted test suites Java teams wanting open-source browser testing
Pricing model Free plan + paid Free
Starting price $19/mo Free plan
Free plan ✓ ✓
Free trial 14 days —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web, Windows, macOS, Linux Windows, macOS, Linux
Support Email, Community, Docs Email, Docs
Integrations 6 integrations 6 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Grafana k6 5/5 · Xceptance LoadTest 4/5
Load testing ✓ ✓
Stress testing ✓ ✓
Browser-based testing ✓ ✓
Distributed load ✓ ✓
API testing ✓ (best) Not checked yet
Specs
Deployment model Hybrid Hybrid
Max virtual users Not checked yet Not checked yet
Our review
Pros
  • JavaScript and TypeScript authoring with local execution
  • HTTP, API, browser, distributed, and Kubernetes testing
  • Integrations with Prometheus, Datadog, Grafana Cloud, and others
  • Supports real-browser tests with WebDriver, Chrome, and Firefox
  • Runs distributed load generation across machines and cloud environments
  • Combines reports, diagnostics, monitoring, and Jenkins integration
Cons
  • Cloud Enterprise requires a minimum $25,000 annual commitment
  • Browser testing relies on Chromium automation
  • Cloud Pro includes 500 virtual user hours per month
  • Test scripting is centered on Java and JUnit
  • Requires a supported JDK across supported deployment environments
  • No paid tiers are available for teams seeking packaged plans
Our verdict

Grafana k6 is an open-source load and performance testing tool for developers, SREs, and QA teams. Tests are scripted in JavaScript or TypeScript and can run locally, across distributed machines, on Kubernetes, or through Grafana Cloud k6.…

Read the review →

Xceptance LoadTest (XLT) is an open-source load and performance testing tool for software development teams, with a particular fit for Java-based engineering groups. Tests can be written in Java and JUnit, then run locally, across…

Read the review →
  1. Grafana k6Performance Testing Software 9.3Free plan · 14-day trial
  2. Xceptance LoadTestPerformance Testing Software 7.4Free plan

Strengths and trade-offs

  • Grafana k6 — where it wins

    • JavaScript and TypeScript authoring with local execution
    • HTTP, API, browser, distributed, and Kubernetes testing
    • Integrations with Prometheus, Datadog, Grafana Cloud, and others

    Where it doesn't

    • Cloud Enterprise requires a minimum $25,000 annual commitment
    • Browser testing relies on Chromium automation
    • Cloud Pro includes 500 virtual user hours per month

  • Xceptance LoadTest — where it wins

    • Supports real-browser tests with WebDriver, Chrome, and Firefox
    • Runs distributed load generation across machines and cloud environments
    • Combines reports, diagnostics, monitoring, and Jenkins integration

    Where it doesn't

    • Test scripting is centered on Java and JUnit
    • Requires a supported JDK across supported deployment environments
    • No paid tiers are available for teams seeking packaged plans
  • Grafana k69.3/10 · Free plan · 14-day trial

    A scriptable performance testing tool with local, distributed, browser, and hosted execution.

    Visit Grafana k6Full verdict →
  • Xceptance LoadTest7.4/10 · Free plan

    A Java-focused open-source suite for browser, API, distributed, and CI performance testing.

    Visit XceptanceFull verdict →

More comparisons

All performance testing software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update