Open-source LLM observability, tracing and evals.
Evals & observabilityopen-source
H
Helicone
Helicone: Open-source LLM observability and gateway. It ranks #3 in Best agent tracing & evals.
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Updated Oct 14, 2026
Score breakdown
| Criterion | Score |
|---|---|
| Output quality for the task | Not yet benchmarked |
| Cost at hobby scale | Not yet benchmarked |
| Lock-in / export | Not yet benchmarked |
| Integrations | Not yet benchmarked |
| Momentum | Not yet benchmarked |
Scores are published only after testing. How we rank.
Pricing
Pricing model: open-source. See vendor pricing page; StackRank does not list prices until verified.
Pros and cons
Pros
- Open-source code
- Self-hostable
- Has an API
Cons
None verified yet.
Pros and cons are drawn only from verified facts on this page.
Key facts
| Category | Evals & observability |
|---|---|
| Integrations | API |
| Self-hostable | Yes |
| Repository | Helicone/helicone |
| Last verified | Oct 14, 2026 |
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