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Opik (Comet)
Open-source LLM evaluation and tracing platform from Comet, combining trace logging, eval metrics and CI-friendly test suites.
| Category | Observability & Tracing |
| OpenTelemetry-native | No (proprietary SDK/format) |
| Open source | Yes |
| Self-hostable | Yes |
| Pricing model | freemium |
| Pricing notes | Apache-2.0 self-host free; Comet cloud free tier + paid plans |
| Framework integrations | openai-sdk, langchain, llamaindex, litellm, dspy, haystack |
| Funding / ownership | Backed by Comet ML ($50M Series B, 2021) |
| GitHub stars | 19,594 |
| Maintenance | active (commit 2026-06-12) |
| License (GitHub) | Apache-2.0 |
| Open issues | 108 |
| Maturity signal | 100/100 (Mature) — computed from public GitHub signals, see methodology |
Pricing/feature source: https://www.comet.com/site/pricing/
Maturity signal is computed from public GitHub data only. How it is calculated.
Frequently asked questions
Is Opik (Comet) open source?
Yes. Licensed under Apache-2.0.
Can I self-host Opik (Comet)?
Yes — Opik (Comet) can run in your own infrastructure.
Is Opik (Comet) OpenTelemetry-native?
No — Opik (Comet) relies on a proprietary SDK/format rather than native OpenTelemetry.
How much does Opik (Comet) cost?
Freemium. Apache-2.0 self-host free; Comet cloud free tier + paid plans