Amjad Masad: Replit Agent 4 + $400M Series D at $9B — 'Cockpit of Your Business,' 10x Build Speed via Parallel Agents

Inc.·high signal

Replit closed a $400M Series D led by Georgian (March 11), tripling its valuation from $3B to $9B in under six months and minting Masad a billionaire. Agent 4 runs multiple parallel sub-agents simultaneously, builds 10x faster than predecessors, and ships full company infrastructure — pitch decks, Stripe integrations, animated logos — not just code. Masad's reframe: Replit is now 'the cockpit or launch control of your business,' shifting the product identity from IDE to autonomous business-creation platform.