Sieve
Developer Tool • March 8, 2026
A virtual browser for AI agents. No rendering, no Chromium — parses HTML, builds accessibility trees, handles clicks, forms, and cookies.
TypeScript
Bun
AI Agents
Web Scraping
Accessibility
Open Source
Key Features
- •Sub-millisecond startup vs 500ms for headless Chrome
- •13KB memory per page vs 50-200MB for real browsers
- •500K+ concurrent pages on 8GB RAM
- •Full accessibility tree generation for agent reasoning
- •Puppeteer-like API for clicks, form fills, and navigation
- •Serializable page state with instant snapshot and restore