Replit
Agent: build and ship software from a prompt, in the browser.
Replit Agent turned the long-standing browser IDE into one of the first mass-market 'describe it and it gets built' agent products, with cloud workspaces and databases attached.
Related startups
Cognition
Devin, the AI software engineer, and the Windsurf IDE.
Cognition builds Devin, an autonomous AI software engineer that plans and executes engineering tasks end-to-end, and acquired the Windsurf agentic IDE in 2025. One of the defining startups of the coding-agent wave.
Cursor (Anysphere)
The AI-native code editor where agent mode lives.
Cursor rebuilt the IDE around models: tab completion, in-editor chat and agent mode that plans multi-file edits and runs commands. Its rise set the pace for the entire coding-agent market.
Factory
Droids: AI workers for software teams.
Factory's 'droids' take engineering tickets from issue to pull request, with sandboxed environments and enterprise controls — agents as members of the dev workflow.