# Braintrust

> Observability and evals platform for AI agents: trace production calls from OpenAI, Anthropic, Gemini, the Vercel AI SDK, LangChain and more, run experiments scored by LLM judges, Autoevals or your own code, review in playgrounds and human annotation queues, and let the built-in Loop agent generate test cases and build evals. MCP server and a bt CLI. Free Starter plan with unlimited users; Pro $249 a month.

- Official site: https://www.braintrust.dev
- Category: [Analytics & Monitoring](https://digidle.com/category/analytics/)
- Tags: llm-observability, evals, agents
- Pricing: not verified by Digidle; see the official site.
- Listing page: https://digidle.com/tools/braintrust/
- Alternatives page: https://digidle.com/alternatives/braintrust/

## In collections

- [AI Agent Infrastructure](https://digidle.com/collections/ai-agent-infrastructure/)

## Best-of lists

- [LLM observability and eval tools](https://digidle.com/best/llm-observability-evals/)

## Other Analytics & Monitoring tools

- [PostHog](https://digidle.com/tools/posthog.md): Open-source product analytics suite with session replay, feature flags and experiments.
- [Sentry](https://digidle.com/tools/sentry.md): Application monitoring for error tracking, tracing and performance.
- [Plausible](https://digidle.com/tools/plausible.md): Lightweight, privacy-friendly, open-source web analytics.
- [Kerno](https://digidle.com/tools/kerno.md): AI runtime QA for backends: tests user flows against your real stack from inside MCP-capable coding agents.
- [Tiden](https://digidle.com/tools/tiden.md): Intent verification for coding agents: keeps versioned specs beside your code and checks agent changes against what you asked for.
- [Navige](https://digidle.com/tools/navige.md): Sits between AI agents and the models they pay for to cut spend via caching, smart routing, context trimming and loop guards.
- [Parseable](https://digidle.com/tools/parseable.md): Open-core (AGPL-3.0) observability platform written in Rust: logs, metrics and traces in one binary on S3-compatible object storage, with SQL and PromQL, OpenTelemetry-native ingest, self-hosted or as Parseable Cloud.
- [Pug](https://digidle.com/tools/pug.md): Open-source (AGPL-3.0) product analytics with unified user profiles: autocapture, trends, funnels, retention and user flows; self-host it or start free on EU-hosted, cookieless Pug Cloud.

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Source: Digidle Tools (https://digidle.com/), a curated directory of developer and vibe-coding tools. Full index: https://digidle.com/llms.txt