AI observability startup hits $800M valuation in 18 months.

Braintrust raised $80M Series B led by Iconiq. They monitor AI model quality and catch hallucinations for production systems.

• $80M at $800M valuation
• Customers: Notion, Replit, Cloudflare, Dropbox
• Built custom database 80% faster at AI traces

How it happened:
• Ankur Goyal hit eval pain at Figma AI team
• Surveyed 50 AI companies - all said "evals are main problem"
• Built ugly prototype in 5 days → Zapier used immediately
• Customers begged to pay before pricing existed

Takeaway: When customers beg to pay for your ugly prototype, you've found something real.

https://siliconangle.com/2026/02/17/braintrust-lands-80m-series-b-funding-round-become-observability-layer-ai/

#startups #funding