Braintrust
Braintrust builds an evaluation and monitoring platform for companies shipping AI features. It provides tools for testing, benchmarking, and improving LLM behavior in production. “Teams at Notion, Stripe, Zapier, Vercel, and Ramp use Braintrust to compare models, test prompts, and catch regressions — turning production data into better AI with every release.”
Browserbase
Browserbase powers web browsing capabilities for AI agents and applications. With their headless browser infrastructure, developers can build features that interact with websites, fill out forms, and replicate user actions. They reached $1M+ ARR in less than 10 months last year, raised $67.5m from top venture capital firms, and are continuing to grow quickly.