# Braintrust

> Platform for tracing agents in production, running evals and turning real traffic into regression tests

Source: https://dontaskagain.com/braintrust
Website: https://www.braintrust.dev/?utm_source=dontaskagain
Pricing: Freemium
Categories: [Evals](https://dontaskagain.com/categories/evals.md), [Observability](https://dontaskagain.com/categories/observability.md)
Listed: 2026-10-18
Updated: 2026-10-18

Braintrust is an observability and evaluation platform for AI agents. It captures agent traces in real time, including prompts, responses and tool calls, finds recurring patterns in production and turns them into evals, so teams can raise quality with each release and catch regressions.

**Key features:**

- Inspect logs and individual traces in real time.
- Score outputs with LLM judges, autoevals, custom code or human review.
- Turn production traces into datasets for regression tests.
- Iterate on prompts in playgrounds and run experiments.
- Run evaluations and generate test cases with Loop, a built-in AI agent.
- Track latency, cost and quality on Brainstore, a database built for AI traces.

Braintrust has native SDKs for Python, TypeScript, Go and other languages, with on-prem or hosted deployment on Enterprise. The free Starter plan includes $10 of model credits, 1 GB of processed data and 10k scores a month with unlimited users; Pro is $249/month.

## More evals

- [LangSmith](https://dontaskagain.com/langsmith.md): LangChain's platform for tracing, monitoring, evaluating and debugging LLM apps and agents in production
- [Langfuse](https://dontaskagain.com/langfuse.md): Open-source platform for tracing, evaluating and improving LLM apps and agents, with prompt management
- [Arize](https://dontaskagain.com/arize.md): Observability and evaluation platform that traces agents, runs evals at scale and helps debug and fix them
- [Galileo](https://dontaskagain.com/galileo.md): Evaluation and observability platform that turns tuned evals into low-cost runtime guardrails for agents
- [Confident AI](https://dontaskagain.com/confident-ai.md): Evaluation and observability workspace that monitors agent traces and turns failures into regression tests