Startup profile · funding coverage
Braintrust funding, valuation and investors
AI evaluation, observability, and prompt tooling for production LLM products.
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Funding, valuation & investors
Answer-first snapshotLatest funding
Series A
$36M · October 2024
Latest known valuation
Not publicly disclosed
Total disclosed equity funding
$116M
Excludes debt, grants, acquisitions, secondaries, and IPO proceeds.
Current status
private
series b · San Francisco, California
Investors in latest funding
Lead: Andreessen Horowitz
Overview
Braintrust provides an AI evaluation and observability platform — helping product teams test prompts, score model outputs, and monitor LLM applications in production.
Why Braintrust is interesting
Used by Stripe, Notion, and Vercel for eval loops — a16z-led A with Greylock participation as evals become table stakes for shipping AI.
Product & use cases
LLM eval infrastructure — datasets, automated scoring, prompt versioning, and production observability for AI product teams.
- Automated eval scoring before LLM feature releases
- Prompt regression testing in CI/CD pipelines
- Production monitoring of model output quality
Key facts
- Series A (Oct 2024): $36M led by a16z for AI evals and LLM devtools (Braintrust blog)
- Series B: $80M with Greylock re-upping alongside a16z (company blog)
- Co-investors not in VCT directory: ICONIQ (Series B lead), Databricks Ventures, Datadog
- Source: https://www.braintrust.dev/blog/announcing-series-a
Funding history (newest first)
Series B
$80MInvestors in our directory
Funds linked from Braintrust's profile — open a fund page for stage focus and related deal articles.
Competitive landscape
Edge: Used by Stripe, Notion, and Vercel for eval loops — a16z-led A with Greylock participation as evals become table stakes for shipping AI.
Eval tooling is table stakes for production AI. Braintrust wins on developer UX and references (Stripe, Notion, Vercel).
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Weights & Biases direct
ML experiment tracking expanding into LLM evals.
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LangSmith direct
LangChain's LLM observability platform.
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Humanloop direct
Prompt management and eval tooling.
Notable stories
- Reference customers include Stripe, Notion, and Vercel.
- ICONIQ led Series B; Databricks Ventures and Datadog among strategics.
Industries
Market / IPO context
Editorial / static context — not a live quote.
Related funding articles
Venture Capital Tracker pieces that cover Braintrust's financing or category context.
FAQs about Braintrust
Practical answers founders, operators, and investors typically search for.
Last updated:
Editorial note: AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.