Grafana k6 vs OpenText LoadRunner

From $19 per month (indicative, Grafana Cloud k6 entry)

Quote on request

Self-hosted is free and unlimited. Cloud plans are billed by virtual-user-hours, which is where budgets go.

Licensed by peak virtual users with protocol bundles priced separately. Historically among the most expensive tools in testing.

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

Community edition with a 50-virtual-user limit.

Category standard

Grafana Labs · since 2016

Established

OpenText · since 1993

• 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.

• The broadest protocol coverage available anywhere.
• Extremely mature analysis and correlation tooling.
• Accepted by enterprise architecture and audit functions without argument.

• 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.

• Very expensive, and the protocol-bundle licensing model is hard to predict.
• Dated tooling and a steep learning curve; specialists are a distinct job role.
• Poor fit for continuous, developer-run performance testing.

Engineering teams that want performance regression tests running in CI.

Large enterprises with legacy protocol requirements and an existing performance-engineering team.