Best alternatives to Murmell in 2026

If you've ever tried running more than one AI coding assistant on the same project at the same time, you already know the problem: they trip over each other, overwrite each other's changes, and you end up more confused than when you started. Murmell fixes that by giving every AI agent its own window on one shared, always-on cloud machine — like a shared whiteboard where each agent claims the files it's working on, so nothing gets clobbered, and you (and your teammates) can watch it all happen live in the browser. Under the hood, Murmell spins up a cloud sandbox with a private GitHub repo, then lets you launch multiple agent windows — each running a real terminal with your agent of choice (Claude Code, Codex, Kimi, OpenCode) — inside one shared canvas. A file-reservation system prevents two agents from writing the same file simultaneously, sessions can be shared via a link so teammates see the same canvas in real time, and machines sleep when idle so you're not paying for runtime you don't use.