Open source
Comet Opik
Trace, evaluate and test LLM-based applications.
What it is
Comet's open source tool for debugging chains and agents: it stores traces step by step, applies evaluation metrics such as hallucination or relevance, and plugs them into your test pipeline.
Best for
Debugging agents with many chained steps.
What the free plan includes
- One user on the free plan
- Monthly trace quota
- Self-hostable open source version
Free plans change often. Confirm the limits on the official page before deciding.
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