Parallel Web Systems Hits $2 Billion Valuation With $100M Series B, Just 5 Months After Series A

Parallel Web Systems, founded by former Twitter CEO Parag Agrawal, raised $100 million in Series B funding led by Sequoia Capital at a $2 billion valuation — nearly tripling from its $740 million Series A valuation in November 2025. The company, which provides web search and research APIs specifically for AI agents, has raised $230 million total and serves over 100,000 developers and enterprise customers including Clay, Harvey, Notion, and Opendoor. The valuation surge in under 5 months reflects the critical importance of web infrastructure for the growing AI agent ecosystem.