I'm a senior editor at Forbes covering venture capital and startups, especially in cloud and AI, out of New York. I edit the Midas List and Under 30 for VC, and created the Midas List Europe and Cloud 100 lists. I've written more than a dozen cover stories on business leaders including Marc Benioff, Patrick Collison and Melanie Perkins.
Braintrust CEO Ankur Goyal says his team can make it easier for"anyone" to build software that makes use of AI. Ankur Goyal built infrastructure for AI products twice before at Impira and Figma. Now, his AI evaluations startup Braintrust is valued at about $150 million following a $36 million Series A round led by a16z.
Goyal’s startup, Braintrust, caters to that challenge. Its software evaluates and monitors how an AI product is performing, then helps pinpoint the problem when something breaks. Bake in Braintrust for just a few weeks, and companies typically see their AI products’ self-reported accuracy – how it scores on a test such as for factual accuracy – soar from below 40% to north of 80%, Goyal claimed.
Braintrust works by providing a software development kit, or SDK, for a business to operate within its own IT infrastructure. At first, AI early adopters like Notion and Zapier layered its evaluations on top of what they’d already built to better gauge performance. It could show them how tweaks, like using more customized prompts or switching from OpenAI’s GPT-4 to Anthropic’s Claude, helped or hurt accuracy.
Goyal only lasted eight months at Figma. While on a long walk with one of the backers of his previous company, Elad Gil, he realized that the jury-rigged solutions he’d built internally addressed a more universal and growing problem. After speaking with 25 potential customers, Goyal decided to launch Braintrust in August 2023.
Notion, the productivity software maker last valued at $10 billion, also fancied itself an aggressive early adopter of LLMs. But as developers shared individual failed prompts and errors with each other manually via files, “it felt like we were in the dark ages,” said cofounder Simon Last. One of Braintrust’s heaviest users, Notion is now pushing the startup to be able to process more and more of its product interactions, he added.
Braintrust AI AI Evaluations AI Evals Notion A16z Braintrust Raises AI Infrastructure LLM Ops
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