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Braintrust is an end-to-end evaluation and observability platform for AI/LLM applications, giving developers tools for evals, tracing, prompt iteration, datasets, and online monitoring of agents in production.
Braintrust is an end-to-end evaluation and observability platform for AI/LLM applications, giving developers tools for evals, tracing, prompt iteration, datasets, and online monitoring of agents in production.
Braintrust was founded in 2023 by Ankur Goyal, who previously founded the document AI company Impira (acquired by Figma) and led the AI team at Figma. Frustrated by the lack of rigorous tooling for shipping reliable LLM products, he started Braintrust to make evals a first-class part of the AI development workflow.
In February 2026, Braintrust raised an $80M Series B led by ICONIQ to become the observability layer for AI applications; existing investors a16z, Greylock and Elad Gil participated.
Founder Ankur Goyal joined First Round's podcast to discuss Braintrust's path to product-market fit selling evals to AI teams.
Andreessen Horowitz published a thesis post explaining its investment in Braintrust as the eval and observability layer for AI applications.
Braintrust announced a $36M Series A led by Martin Casado at Andreessen Horowitz, with participation from Greylock, Elad Gil, Basecase, Datadog, Databricks Ventures and operators including Greg Brockman and Arthur Mensch.
Ankur Goyal joined Latent Space to discuss why evals are the foundation of production AI engineering and how Braintrust supports the full eval workflow.
VentureBeat profiles Braintrust's evaluation platform, which lets enterprise teams run reproducible evals on LLM outputs to ship reliable AI features faster.
Braintrust announced a $5.1M seed round in December 2023 led by Saam Motamedi at Greylock, to build evaluation infrastructure for AI products.
$121M raised total