Braintrust vs Windsurf
Side-by-side comparison of AI visibility scores, market position, and capabilities
AI observability and eval platform for production AI. $800M valuation after $80M Series B (Feb 2026). Clients: Notion, Cloudflare, Ramp. Founded 2023, SF. Private.
About
Braintrust is an AI observability and evaluation platform founded in 2023 by Ankur Goyal in San Francisco. The platform enables engineering teams to build, test, monitor, and improve AI products by providing tools for prompt engineering, dataset versioning, automated scoring, trace inspection, and quality measurement. Goyal previously founded Impira (acquired by Figma) and led Figma's AI team.
Codeium's agentic IDE; 2nd most-discussed AI coding tool after Cursor. $1.25B valuation; Cascade agentic framework enables autonomous multi-file editing. Positioned as cost-competitive alternative to Cursor with comparable capabilities.
About
Windsurf is an AI-native code editor developed by Codeium, designed to bring agentic AI directly into the software development workflow. Launched in late 2024, Windsurf introduced the 'Cascade' agentic framework — enabling the AI to autonomously read, write, and execute code across multiple files simultaneously, rather than merely suggesting single-line completions. The product became the second-most-discussed AI coding tool after Cursor, recognized for its aggressive pricing and deep IDE integration.
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