GitHub Codespaces gives everyone on your team their own cloud dev environment. Coshell gives your team one shared environment with a coding agent everyone prompts together.
GitHub Codespaces is a solid cloud dev environment. It boots fast, runs your repo, and gives each developer a clean machine.It just gives each of them a separate one.
Codespaces solves where your code runs. Coshell solves how your team and the agent work in it, at the same time.
Codespaces and Coshell are not the same category. One is where your code runs. The other is how your team works with the agent inside it. Many teams run Coshell on top of cloud infra exactly like Codespaces.
Codespaces gives each person a clean box. Coshell adds the layer between the people: one shared session, one shared agent. Every line below is running in production today.
Everyone in the drive prompts the same agent in the same live session, watching the same work land on the same running environment.
When two agents reach for the same lines of the same file, the overlap layer catches it and steers the second one before it clobbers the first, instead of the last write silently winning.
The codebase is read once and cached for the whole team, instead of every person's own agent reloading it in its own box.
Keep a session private to you, share it with named teammates, or open it to the whole drive. Your call, per session.
Bring your own keys for any of the 70+ supported models, scoped per drive, or use free models through your own infrastructure on enterprise.
Join the same session from any browser, your phone, or the CLI. The same drives, the same login, everywhere.
| GitHub Codespacesa box per developer | Coshellone shared live session | |
|---|---|---|
| What it is | A cloud dev environment, one container per developer | A shared cloud dev environment with a coding agent everyone prompts |
| Persistent cloud workspace | Yes, per-user containers | Yes, a persistent drive your whole team shares |
| Same live agent session | Each person runs their own agent, if any | One agent session, prompted by everyone in the drive |
| Real-time multiplayer | Each developer works in their own box | Shared filesystem, terminal, and running app, live |
| Overlap detection | Resolved later, by you, in git | Overlapping edits caught and steered, with a record |
| Shared agent context | Each agent reloads the codebase | Loaded once, cached for the whole team |
| Per-session privacy | Repo and branch permissions | Private, named, or open to the drive, per session |
| Models | Bring your own, Copilot or your own tools | 70+ models on your own keys, scoped per drive |
| Access from phone or CLI | Browser and VS Code or CLI, per user | Join the same session from a browser, phone, or terminal |
| Pushes to real git | Yes | Yes |
| Free tier | Monthly free hours, then per-user billing | Free to self-host, up to 5 teammates; Teams beyond |
| Best for | Giving each engineer a clean, isolated machine | Teams who want to work with one AI agent in one live session |
Codespaces is a trademark of GitHub. Comparison reflects shipped capabilities. Coshell is built on OpenCode.
Coshell does not replace where your code runs. You can launch a drive in seconds and keep your existing repositories, branches, review, and CI exactly as they are. What is new is the layer on top: one live session your whole team and the agent share at once.
Coshell is built on OpenCode and compatible through v1.17.10, and adds the shared session your whole team works in together.
Codespaces gives each developer their own cloud container to work in alone. Coshell gives your whole team one shared environment with a coding agent that everyone prompts in the same live session. With Codespaces you collaborate by pushing branches and merging. With Coshell you are in the same session at once, watching the agent work on the same files and terminal, live.
It depends on what you need. If you only want a clean isolated machine per engineer, Codespaces does that well. If you want your team to work with one AI agent together in real time, that is what Coshell adds, and it is not something a box-per-person model does. Some teams use both, and read why multiplayer matters.
Yes. Everyone works in one shared environment, so unlike a box-per-developer setup there is no separate copy drifting away to merge back, and the worst collisions never form. When two agents reach for the same lines of the same file, the overlap layer catches it and steers the second one before it overwrites the first. See how multiplayer works.
Coshell works with 70+ models on your own keys, scoped per drive. Admins choose the allowed set and a fallback. You can also use free models through OpenCode's gateway. Usage on your own keys is billed by your provider, not by us.
Your code lives in your own git. A drive commits and pushes to the repositories you already use, so your branching, review, and CI are untouched. Self-host it on your own machine and your code never leaves it, free; the Enterprise tier adds org-wide on-prem and SSO.
Codespaces bills per user, by compute hour. Coshell is free to self-host: run a drive on your own machine with up to five teammates in your org, unmetered. More than five teammates, and we set your team up. See the full pricing.
Start a free drive in the browser, or attach from the CLI. Your whole team works with one agent, in one live session, on the same codebase.