Braintrust Raises $80 Million Series B to Build Observability Layer…

Team S · 2026-02-18T13:17:25.000Z

Braintrust, the U.S.-based AI-native observability and evaluation platform designed to monitor and optimise production AI models, has announced an $80 million Series B funding round aimed at scaling its infrastructure and expanding its engineering and go-to-market operations. The raise positions Braintrust as a critical piece of the AI stack providing specialised tools to monitor AI models for accuracy, regression, hallucinations, and performance drift as deployed systems become more complex and integral to enterprise workflows. The Series B round was led by ICONIQ, with participation from prominent backers including Andreessen Horowitz, Greylock, basecase capital, and Elad Gil all returning investors who continue to back Braintrust’s mission of building observability that’s purpose-built for AI. The new capital aims to help the company accelerate development of its monitoring platform, enhance tooling for tracking AI reasoning processes, and support growth into new regions as AI production workloads increase. Braintrust’s platform provides exhaustive tracing, automated model evaluation, and tools that help engineering teams understand and debug AI behaviour functions that general-purpose observability systems struggle to deliver. The company’s focus on AI-specific evaluation workflows has led to adoption by teams needing deeper insights into model reliability and product quality as generative AI and agentic systems scale. Braintrust is headquartered in San Francisco, United States, where it continues to innovate at the intersection of AI infrastructure, reliability engineering, and observability for next-generation AI systems.

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Braintrust Raises $80 Million Series B to Build Observability Layer… | Newnex