When should you choose Braintrust?

Documented coverage is broader and dataset management is the discipline you are missing. Human evaluation loops matter because automated scoring alone has not been enough. Self serve pricing means your team starts without procurement.

When should you choose Opik?

Open source and free self hosting is a requirement, not a preference. An agent optimizer that acts on evaluation results closes the loop. Guardrails alongside evaluation consolidates two concerns into one tool.

Agentic Index

Braintrust vs Opik (2026)

Both make evaluation the centre of the workflow rather than an afterthought, at 8 and 7 of 14.

Braintrust is evaluation and observability with self serve pricing, MCP support, human evaluation loops and dataset management, free starter then 249 dollars monthly for Pro. Opik from Comet is open source and free to self host, with tracing, LLM as a judge metrics, guardrails and an agent optimizer, plus a free cloud tier. Braintrust's human evaluation loops and dataset management are the more mature product; Opik's agent optimizer and open source licence are the reason teams pick it anyway.

Choose Braintrust if

Documented coverage is broader and dataset management is the discipline you are missing.
Human evaluation loops matter because automated scoring alone has not been enough.
Self serve pricing means your team starts without procurement.

Choose Opik if

Open source and free self hosting is a requirement, not a preference.
An agent optimizer that acts on evaluation results closes the loop.
Guardrails alongside evaluation consolidates two concerns into one tool.

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Braintrust vs Opik (2026)

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