Braintrust
Braintrust positions itself as the active observability platform for agents, combining trace observability, evals, discovery, and deployment support for production AI systems. It claims to help teams ship quality agents at scale and emphasizes monitoring, evaluation, and regression prevention.
Braintrust was introduced in a company blog post as an enterprise-grade stack for rapidly building and shipping AI products without guesswork. The post describes the company’s initial product focus on evaluations, datasets, and a collaborative playground for AI development.
It's time to build reliable AI - Blog - Braintrust VerifiedBraintrust announced a $5.1 million seed round led by Greylock partner Saam Motamedi, bringing total capital raised to $8.3 million. The company said the financing would help accelerate its AI infrastructure product.
Braintrust's seed round: $5m to build infrastructure for AI products - Blog - Braintrust VerifiedBraintrust announced a $36 million Series A, bringing total funding to $45 million. The round was led by Andreessen Horowitz with participation from existing investors and several strategic angels.
Announcing our $36M Series A - Blog - Braintrust Verified$80M Series B announced Feb 2026 led by ICONIQ.
VerifiedBraintrust announced an $80 million Series B led by ICONIQ, with participation from Andreessen Horowitz, Greylock, Elad Gil, Basecase Capital, and others. The company said the capital would support engineering and go-to-market expansion plus new products.
Braintrust's series B: building the infrastructure for production AI - Blog - Braintrust Verified