Replit

What Replit is

Replit is a browser-based AI development and deployment platform centered on Replit Agent, a conversational agent that scaffolds, runs, tests, and ships full-stack applications from plain-language prompts. It bundles authentication, Postgres database, hosting, and observability into a single product, and is used by over 40 million people and 85% of the Fortune 500.

Key features

• Replit Agent 4 autonomously writes, tests, and ships production-ready code from natural language prompts
• Replit Chat and Plan mode for conversational brainstorming and step-by-step project scoping
• Replit Design with an infinite Canvas surface — pan-and-zoom frames for mockups, web and mobile apps, slides and vector art, with a Build toggle that turns a design frame into a running app (Core or Pro)
• Intelligent Model Routing selects best-fit model per task for cost and quality
• Built-in full-stack infrastructure: Authentication, PostgreSQL Database, Hosting, and Monitoring
• Self-testing checkpoints and database rollback up to 28 days for safe iteration
• Multi-artifact projects that share a single backend across web, mobile, slides, and designs

Where it lives

Sources & media

• Replit snags $9B valuation 6 months after hitting $3B · TechCrunch
• Replit hits $3B valuation on $150M annualized revenue · TechCrunch
• Replit pricing and plans · Replit Docs (official)
• Replit Agent overview · Replit Docs (official)
• Replit Design — Canvas · Replit Docs (official)
• Replit — official company page · Replit (official)
• Replit — Wikipedia · Wikipedia
• Introducing Replit Agent 4