STATIC COMPARISON / TIER B
Grafana k6 vs LoadRunner Professional
Answer Grafana k6 is an open source, self-hosted load testing tool from Grafana Labs, scripted in JavaScript, TypeScript. LoadRunner Professional is a commercial, self-hosted enterprise performance suite from OpenText, scripted in C, JavaScript, C#. The practical split is the cost model: Grafana k6 is open source, LoadRunner Professional is commercial.
Curator verdict
Both cover HTTP, HTTPS, WebSocket. On recorded coverage LoadRunner Professional is the wider of the two (6 protocols against 4), which matters only if your workload actually uses the extra ones. Budget and procurement usually settle Grafana k6 against LoadRunner Professional before any benchmark does. Run the same scenario on both before you standardize; the rows below only tell you what is true on paper.
Spec matrix
| Field | Grafana k6 | LoadRunner Professional |
|---|---|---|
| Vendor | Grafana Labs | OpenText |
| Category | Load Testing | Enterprise Suite |
| License | Open Source | Commercial |
| Deployment | Self-hosted | Self-hosted |
| Status | Active | Active |
| First released | 2017 | 1993 |
| Pricing | Free; AGPL-3.0 license. | Commercial license; request a quote. |
| Scripting | JavaScript, TypeScript | C, JavaScript, C# |
| Protocols | HTTP, HTTPS, WebSocket, gRPC | HTTP, HTTPS, WebSocket, SAP, Citrix, Oracle |
| OS support | Windows, macOS, Linux | Windows, Linux |
How to choose
- Choose Grafana k6 if you need a free, self-supported stack (Free; AGPL-3.0 license).
- Choose LoadRunner Professional if you can fund a commercial license for vendor support (Commercial license; request a quote).
- Only Grafana k6 records support for gRPC — one hard requirement there decides the pair on its own.
- Only LoadRunner Professional records support for SAP, Citrix, Oracle — one hard requirement there decides the pair on its own.
- Match the authoring language to the team: Grafana k6 means JavaScript, TypeScript, LoadRunner Professional means C, JavaScript, C#.
- Open the Test Rig to compare license, deployment, protocol and OS rows side by side.
Need more than two tools or a shareable matrix? Use the live Test Rig from the directory compare tray.
Browse directory