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Head-to-head · Performance Testing Software

Grafana k6 vs Speedscale

  • 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
Speedscale #15 in Performance Testing Software 7.9/10 Free plan Free plan✓ 4 of 5 features Visit Speedscale

Grafana k6 leads on 1 check, Speedscale on 0, and 5 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 7.9 out of 10; our editors rank them #1 and #15.

Grafana k6 offers browser-based testing; Speedscale doesn't.

Grafana k6 is the better fit for open-source teams building scripted test suites. Speedscale is the better fit for teams replaying production traffic safely.

  • Grafana k6 fits best

    Open-source teams building scripted test suites

  • Speedscale fits best

    Teams replaying production traffic safely

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Grafana k6 9.3/10 Visit ↗ Speedscale 7.9/10 Visit ↗
At a glance
Editor score 9.3 7.9
Ranking #1 in Performance Testing Software #15 in Performance Testing Software
Best for Open-source teams building scripted test suites Teams replaying production traffic safely
Pricing model Free plan + paid Free plan + paid
Starting price $19/mo —
Free plan ✓ ✓
Free trial 14 days —
Deployment Cloud, Self-hosted Cloud, Self-hosted, Desktop
Platforms Web, Windows, macOS, Linux Web, Windows, macOS
Support Email, Community, Docs Email, Community, Docs
Integrations 6 integrations 15 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Grafana k6 5/5 · Speedscale 4/5
Load testing ✓ ✓
Stress testing ✓ ✓
Browser-based testing ✓ (best) —
Distributed load ✓ ✓
API testing ✓ ✓
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
  • Captures and replays production traffic against code or services under test
  • Supports stress, spike, peak, soak, and ramp-up workload patterns
  • Integrates with major CI/CD, Kubernetes, observability, and container tools
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
  • Advanced replay and team dashboards start on the Pro plan
  • Paid plans use usage-based billing by monthly data ingestion
  • SSO, enterprise controls, and BYOC are reserved for Enterprise
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 →

Speedscale captures application traffic and replays it against code changes or services under test. It is designed for teams that need production-informed API, regression, and load testing across local development environments, Kubernetes…

Read the review →
  1. Grafana k6Performance Testing Software 9.3Free plan · 14-day trial
  2. SpeedscalePerformance Testing Software 7.9Free 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

  • Speedscale — where it wins

    • Captures and replays production traffic against code or services under test
    • Supports stress, spike, peak, soak, and ramp-up workload patterns
    • Integrates with major CI/CD, Kubernetes, observability, and container tools

    Where it doesn't

    • Advanced replay and team dashboards start on the Pro plan
    • Paid plans use usage-based billing by monthly data ingestion
    • SSO, enterprise controls, and BYOC are reserved for Enterprise
  • 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 →
  • Speedscale7.9/10 · Free plan

    A production-traffic replay tool with local mocking, distributed workloads, and CI/CD integrations.

    Visit SpeedscaleFull 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