Braintrust
An AI-infrastructure company providing evaluation and observability tools for production AI.
The Company
Braintrust helps teams evaluate, test and observe AI applications in production. Its product is aimed at the reliability layer of enterprise AI, where teams need to measure model behaviour, diagnose failures and improve systems over time.
In February 2026, Braintrust announced an $80 million Series B led by ICONIQ. Axios Pro reported that the round valued the company at $800 million post-money, while the company described the financing as support for becoming an observability layer for production AI.
Why It Matters
Production AI requires testing and measurement infrastructure that traditional software-monitoring tools were not built to provide. Braintrust is a direct bet on that emerging software layer, where enterprise standardisation could create durable platforms.
Valuation History
- $800M→Feb 2026$80M Series BSource ↗
What Changed
Announced $80M Series B led by ICONIQ to expand production-AI evaluation and observability.
THE NEXT COMPANY. A CLEARER PICTURE.
Get the next breakdown.
Independent company research and perspectives on private markets, delivered through The Private Ledger on Substack.