Braintrust

About Braintrust

Financials

Dated, source-cited figures. Estimates are marked.

Products by Braintrust

All products by Braintrust reviewed by our AI panel of experts.

BraintrustAI Analytics

AI evaluation and observability platform for LLM applications

From $249/mo8.0/10

How Our Review Panel Scores Braintrust

Six independent reviewer personalities assessed Braintrust's product on their own terms. They landed within 0.9 points of each other, an unusually strong consensus.

Averaged across 1 reviewed product in our catalog. Scores are out of 10.

Competitive Landscape

Who Braintrust competes with, and how they differ.

LangSmith8.1/10

LangSmith is tightly bundled with the LangChain/LangGraph framework, giving it default distribution among LangChain's large developer base, while Braintrust is framework-agnostic and positions itself as the eval layer for any LLM stack.

2 products reviewed on TopReviewed

Arize Phoenix8.1/10

Arize built its platform first for traditional ML monitoring (drift, data quality) before extending Phoenix into LLM tracing and evals, giving it deeper ML-ops roots than Braintrust's eval-first, AI-native design.

1 product reviewed on TopReviewed

Langfuse8.0/10

Langfuse is open-source and self-hostable, appealing to cost-conscious and data-sovereignty-sensitive teams, whereas Braintrust is closed-source and hosted, built around its proprietary Brainstore database for trace querying.

1 product reviewed on TopReviewed

Weights & Biases8.0/10

W&B built its business on ML experiment tracking and extended into LLM evaluation via Weave, so it competes for teams already standardized on W&B for model training, while Braintrust was purpose-built for LLM/agent evals from day one.

1 product reviewed on TopReviewed

Helicone7.9/10

Helicone is a lightweight, proxy-based LLM logging and cost-monitoring tool with a simpler setup, competing on ease of integration rather than Braintrust's deeper eval and experimentation tooling.

1 product reviewed on TopReviewed

Galileo AI7.7/10

Galileo focuses on enterprise-grade GenAI evaluation and guardrails with compliance-oriented features, competing for larger regulated buyers, where Braintrust competes more on developer experience and speed of iteration.

1 product reviewed on TopReviewed

Company Timeline

Key milestones in Braintrust's history, with sources.

1. Feb 17, 2026Funding

   Series B — $80M led by ICONIQ Capital

   Braintrust raised an $80M Series B led by ICONIQ Capital, with participation from Andreessen Horowitz, Greylock, Elad Gil, and Basecase Capital; ICONIQ GP Matt Jacobsen joined the board.

   braintrust.dev
2. Oct 8, 2024Funding

   Series A — $36M led by Andreessen Horowitz

   Braintrust raised a $36M Series A led by Martin Casado at Andreessen Horowitz, with new investors Datadog and Databricks Ventures, bringing total funding to $45M.

   braintrust.dev
3. Dec 13, 2023Funding

   Seed round — $5.1M led by Greylock Partners

   Braintrust raised a $5.1M seed round led by Saam Motamedi at Greylock Partners, backed by angels including Greg Brockman and Guillermo Rauch, bringing total capital raised to $8.3M.

   braintrust.dev
4. 2023Founded

   Founded by Ankur Goyal

   Ankur Goyal founded Braintrust after previously founding Impira (acquired by Figma) and leading Figma's ML platform team; the eval/observability product launched in August 2023 with early customers including Airtable, Zapier, and Coda.

   venturebeat.com