Braintrust

source

closed

license

Apache-2.0(OSI, client SDKs only

self-host

enterprise-only(hybrid)

platform

proprietary(Brainstore custom DB, evals/tracing/automation all SaaS)

Braintrust's client SDKs for logging, tracing and evaluations are open source under Apache-2.0. The Brainstore backend, dashboards and automation are proprietary, and the only self-hosting route is an Enterprise-plan hybrid deployment where Braintrust runs the UI and authentication, so the platform itself is closed.

• https://github.com/braintrustdata/braintrust-sdk recorded 2026-08-13

  Repository README - "This repository contains Braintrust's JavaScript/TypeScript SDKs and integrations", with the core SDK described as being "for logging, tracing, evals, and CLI". Its License section reads Apache-2.0. Nothing in the repository is the platform itself.

• https://raw.githubusercontent.com/braintrustdata/braintrust-sdk-python/main/py/pyproject.toml recorded 2026-09-29

  The Python SDK package metadata describes the package as "SDK for integrating Braintrust" and declares its license as "license = " MIT.

• https://raw.githubusercontent.com/braintrustdata/braintrust-sdk/main/LICENSE recorded 2026-09-29

  The SDK repository license file is the Apache License text, with "Licensed under the Apache License, Version 2.0" and "Copyright 2023 Braintrust Data LLC".

• https://raw.githubusercontent.com/braintrustdata/braintrust-sdk/main/README.md recorded 2026-09-29

  The SDK repository README says "This repository contains Braintrust's JavaScript/TypeScript SDKs and integrations" and lists the core package as "Core JavaScript/TypeScript SDK for logging, tracing, evals, and CLI." with a license section of "Apache-2.0".

• https://www.braintrust.dev/ recorded 2026-09-29

  The homepage describes the proprietary backend, "Brainstore, the database built for AI data at scale", and offers only "Deploy Brainstore data plane on your own infrastructure" for self-hosting, next to "SOC 2 Type II certified".

• https://www.braintrust.dev/docs/admin/self-hosting recorded 2026-09-29

  The self-hosting docs say "Braintrust offers a self-hosted deployment option that separates data storage from platform management" and that "Braintrust provides the managed UI, authentication, and platform updates", with the option limited to the "Enterprise plan".

Braintrust is a hosted platform, and the braintrust package on PyPI is its client, installed by every application that sends it logs or evaluations, so its downloads count client installs rather than use of the platform. The vendor publishes no user or account figure; its homepage features customer stories from Notion and Graphite and links to Coursera.

• https://www.braintrust.dev/ recorded 2026-09-29

  Homepage customer stories: "How Notion evaluates AI at scale across 70 engineers" and "How Graphite builds reliable AI code review at scale", with a Coursera story link. No user or account count appears.

Braintrust combines real-time tracing across millions of logs, LLM, code and human-scored evaluations against versioned datasets, prompt management with a playground, and automation that discovers patterns and gates releases on quality. That automation and quality-gate depth puts it a step above Langfuse, at the frontier of evaluation-first observability.

• https://www.braintrust.dev/ recorded 2026-09-29

  Homepage: "Inspect every agent trace and tool call, search across millions of logs, and track latency, cost, and quality in real time." and "Block bad releases before they hit production".

• https://www.braintrust.dev/docs/llms.txt recorded 2026-09-29

  Docs index: "Connect Claude Code, Cowork, Cursor, Codex, and other MCP clients to Braintrust." with pages on Topics, scorers and playgrounds.