FusionReactor vs Parca
FusionReactor
fusion-reactor.com
Parca
parca.devSide by side
| Figure | FusionReactor | Parca |
|---|---|---|
| Price from | $22/mo | Free |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 6 | 1 |
| Spec score · Continuous Profiling Tools | 8.2 (#10) | 8.1 (#12) |
| Deployment | The FusionReactor agent is available on-premise or can be added to Cloud, and the maker says data can stay local. | The project documents installation using binaries, containers, Kubernetes, and Snaps. |
| Security | The security page states Intergral Information Systems GmbH is SOC 2 Type 2 compliant and that personal data processing is GDPR compliant. | The project says the Agent source is open source, it is written in Go, and its binaries and container images are fully reproducible; the Agent needs privileged access to load eBPF programs. |
| Support | The site provides a Contact Support page for requesting assistance. | Polar Signals offers paid support for users of Parca’s open-source project. |
Plans
FusionReactor
- Developer License$22 a month
- Starter Cloud$49 a month
- FusionReactor APM$79 a month
- Pro AI Cloud$249 a month
- Advanced AI Cloud$899 a month
- CustomPriced on request
In their own words
FusionReactor
FusionReactor has no write-up on Specifiction yet; its figures are above.
Parca
Parca is a self-hosted profiling system that collects and stores CPU, memory, I/O, and other profiles for queries over time. Its eBPF-based Parca Agent captures user-space and kernel-space stack traces, while the system also accepts valid pprof-formatted profiles pushed through gRPC or pulled from targets over HTTP. Users can query by labels, compare dimensions such as processes or code versions, and view profiles in the web interface with Icicle Graphs. A Grafana plugin can display profiles stored in Parca. The agent supports automatic profiling for languages including C, C++, Go, Rust, .NET, Deno, Erlang, Java, Julia, Node.js, Wasmtime, PHP, Ruby, and Python. Installation options include binaries, containers, Kubernetes, and Snaps. Parca is open source under the Apache 2 License and is free. The agent requires Linux kernel 4.18 or newer and privileged access to load eBPF programs. Parca says it receives profiling statistics and function-name metadata, not binaries or source code.