browser-ide
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MarsCode Put the Workshop in Your Browser - Then Became Trae
MarsCode tried to make the blank laptop feel less blank: open a browser, import a repo, ask questions, run code. The name has moved on to Trae, but the original product still explains where ByteDance's coding ambitions began.
Sol Browser
Sol Browser is a San Francisco startup (Y Combinator Fall 2025) building a browser designed to work as a developer's IDE. It lets engineers run multiple AI coding agents - Claude Code, Codex, Cursor - in parallel from browser tabs, alongside terminals, diff viewers, running apps, docs and pull requests. The company began as Inspector, an AI IDE that connected the browser to the codebase so agents could see the same visuals, elements and logs a developer sees, then expanded that idea into a full browser workspace. Founded by Quentin Romero Lauro and Michael Klikushin, it operates as Sandbox Technologies, Inc.
Replit
Replit is a browser-based software creation platform that has evolved from a collaborative cloud IDE into one of the leading agentic AI coding companies. Its Replit Agent lets anyone - engineer or not - go from a natural language prompt to a deployed, production-ready application. Headquartered in Foster City, California, the company now serves more than 40 million users and reached a $9B valuation in 2026.