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 A
2024-10 $36MSeries B
$80M- ICONIQ (lead)
- Greylock (participant)
- Andreessen Horowitz (participant)
Investors 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
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.
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