Braintrust announced an US$80 million Series B aimed at infrastructure for evaluating and improving production AI applications, the company said on 17 February 2026.
AI evaluation vendors are raising capital as teams move agents from demos into monitored production. Buyers still need proof that eval suites catch regressions on their own prompts and tools.
Braintrust sells evaluation and observability for LLM and agent applications. The Series B post ties the raise to demand for production AI quality loops.
ML platform owners should demand eval coverage on their critical user journeys — before treating any Series B headline as a completed AI quality programme.