# Braintrust

> Braintrust is the end-to-end developer platform for shipping AI products. It connects evaluations, observability, prompt iteration, and an agentic optimizer (Loop) into one workflow so engineering teams can measure, debug, and improve LLM applications in production. Teams at Notion, Stripe, Vercel, Airtable, Instacart, Zapier, Ramp, Dropbox, Cloudflare and BILL use it to ship AI that doesn't silently regress.

- **Founded:** 2023
- **Headquarters:** San Francisco, United States
- **Founders:** Ankur Goyal (Founder & CEO)
- **Team size:** ~160
- **Products:** Evals, Observability, Loop, Brainstore, Playground & Prompt Management
- **Notable:** Raised $121M total across Seed, Series A and Series B in roughly three years., Adopted by AI teams at Notion, Stripe, Vercel, Ramp, Dropbox and Cloudflare., Shipped Brainstore, a purpose-built log store for AI traces at enterprise scale.

## Products & services

- **Evals** — Run experiments against real datasets, compare prompts and models side by side, and score with LLMs, code, or humans.
- **Observability** — Trace, log, and inspect production LLM and agent traffic in real time, then turn traces into evals.
- **Loop** — An agentic optimizer that proposes prompt and scorer improvements based on your data.
- **Brainstore** — A purpose-built database for AI logs and traces, designed to keep search fast at enterprise volume.
- **Playground & Prompt Management** — Versioned prompts, side-by-side comparisons, and a shared workbench for product and engineering teams.

## Achievements

- Raised $121M total across Seed, Series A and Series B in roughly three years.
- Adopted by AI teams at Notion, Stripe, Vercel, Ramp, Dropbox and Cloudflare.
- Shipped Brainstore, a purpose-built log store for AI traces at enterprise scale.
- Shipped Loop, an agentic optimizer that proposes prompt and scorer improvements automatically.
- SOC 2 certified with hybrid and self-hosted deployment options.

## Latest updates

- **2026-02** — Announced $80M Series B led by ICONIQ, with a16z, Greylock and Elad Gil participating.
- **2025** — Launched Loop, the agentic optimizer, and Brainstore, a database tuned for AI logs.
- **2024** — Closed $36M Series A led by Martin Casado at a16z.

## Links

- Website: https://www.braintrust.dev
- LinkedIn: https://www.linkedin.com/company/braintrust-data
- Twitter/X: https://x.com/braintrustdata
- GitHub: https://github.com/braintrustdata
- YouTube: https://www.youtube.com/@BraintrustData

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Profile page: https://yespress.io/braintrust
Published by YesPress — https://yespress.io
Last updated: 2026-05-29