Replit Raises $400M at $9B Valuation; CEO Masad Claims Agent 4 Can 'Build Entire Companies'

StartupHub.ai·medium signal

Replit closed a $400M Series D led by Georgian at a $9B valuation, making founder Amjad Masad a billionaire worth an estimated $2B. The company simultaneously launched Agent 4, which Masad claims is capable of not just building applications but creating and maintaining entire companies. With 150K+ paying customers and a target of $1B annual revenue by end of 2026, Replit is betting that vibe coding evolves from prototyping tool to full business infrastructure.