What Braintrust does
Braintrust (Braintrust Data, Inc.) is an AI observability and evaluation platform for teams building LLM-enabled applications and AI agents. The company’s core idea is that agent/LLM behavior is non-deterministic and changes over time, so teams need an end-to-end workflow that (1) captures real production behavior (traces, prompts/responses, and tool calls), (2) defines what “good” means via evaluations (including versioned datasets and scoring), and (3) turns production signals into continuous improvements and release gates. Braintrust positions its system as “active observability” for agents and emphasizes capabilities designed for long-running, multi-step traces rather than only single-shot prompt/response testing.
In product terms, Braintrust is presented as a platform with three main pillars—Observe, Evaluate, and Discover—plus supporting developer workflows and data infrastructure. “Observe” focuses on ingesting and inspecting agent traces and instrumenting applications so teams can see what actually happened in production. “Evaluate” centers on running experiments and scoring outputs using LLMs, code, or humans, alongside versioned datasets and comparisons across prompts/models. “Discover” focuses on turning production patterns into evals/automation (including continuous online scoring and quality gates) so teams can block regressions before they ship. Additional platform components highlighted by Braintrust include Loop (to generate prompts/scorers/datasets), Topics (automated pattern discovery), an MCP server for connecting coding agents/IDE workflows, and Brainstore, a database designed for querying large, nested agent traces.
Business model: Braintrust sells an enterprise developer platform (with plans referenced publicly in its content and program pages, and with security/compliance and deployment options described as selling points). It serves cross-functional engineering and product teams who need measurable reliability for LLM features and agents in production. Examples of customers and partner ecosystems referenced by Braintrust include teams like Notion, Stripe, Cloudflare, Zapier, Airtable, and others (cited on its website and in funding/feature posts).