Post by Braintrust

We’re thrilled to announce that we've raised a $36M Series A led by Martin Casado at Andreessen Horowitz to advance the future of AI software engineering, bringing our total funding to $45 million. Through our work with top AI engineering and product teams from Notion, Stripe, Vercel, Airtable, Instacart, Zapier, Coda, The Browser Company, and many others, we’ve had a front-row seat to what it takes to build world-class AI products. Along the way, we’ve learned a few key lessons: - Crafting effective prompts requires active iteration. - Evaluations are crucial for systematically improving quality over time. - Production logs provide a vital feedback loop, generating new data points that drive better evaluations. Evals are just the first step to building AI apps. That’s why we’re also excited to introduce functions, the flexible primitive for creating prompts, tools, and scorers that sync between your codebase and the Braintrust UI.

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