Grafana k6 vs BlazeMeter

From $19 per month (Grafana Cloud Pro platform fee; k6 usage is billed on top)

From $149 per month (indicative entry plan)

Self-hosted is free and unlimited. On Grafana Cloud the free tier includes 500 virtual-user-hours a month, then k6 bills from $0.150 per virtual-user-hour on top of the $19 Pro platform fee — the VU-hours, not the platform fee, are where budgets go.

Priced by concurrent virtual users. Large enterprise tests are a substantial annual commitment.

The k6 CLI is fully open source with no virtual-user limits when self-run.

Free tier with a small virtual-user cap and limited test duration.

Category standard

Grafana Labs · since 2016

Widely used

Broadcom · since 2011

• Excellent resource efficiency — thousands of virtual users from one modest machine.
• Thresholds make performance a build gate rather than a report nobody reads.
• Native Grafana and Prometheus integration ties load results to server-side metrics.

• Runs your existing open-source scripts unchanged — no migration cost.
• Global load generation from many regions without owning infrastructure.
• Reporting and trend analysis suited to handing results to management.

• The JavaScript runtime is not Node — no npm modules unless bundled, which surprises people.
• Browser-level load testing exists but is much heavier and less mature than protocol-level testing.
• Distributed execution requires either the cloud product or your own orchestration.

• Expensive relative to running the same open-source scripts on your own machines.
• Virtual-user pricing makes frequent large tests costly.
• Adds a vendor to a workflow that can function entirely on open source.

Engineering teams that want performance regression tests running in CI.

Enterprises with existing JMeter estates that need scale and reporting without building it.