Boxes.dev
Cloud devboxes for running multiple AI coding agents in parallel.
For developers who live in Claude Code or Codex and need true parallel agent isolation, Boxes.dev is a necessary tool. The fork-per-agent model solves real pain, but it's overkill if you rarely run multiple agents or are happy with local worktrees.
- Developers running multiple Claude Code or Codex agents simultaneously
- Teams building automated code generation pipelines with agent orchestration
- Power users needing isolated cloud environments for AI agents
- Anyone who wants agents to keep working offline or overnight
- Pure manual coding without AI agents
- Single-agent local workflows (overkill)
- Non-technical users unfamiliar with containers and CLIs
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In short
Boxes.dev — Cloud devboxes for running multiple AI coding agents in parallel. Best for Developers running multiple Claude Code or Codex agents simultaneously, Teams building automated code generation pipelines with agent orchestration, Power users needing isolated cloud environments for AI agents. Free to start; paid plans from $19/mo.
Viability Score
How likely is Boxes.dev to still be operational in 12 months? Based on 4 signals — momentum (how recently it shipped), wrapper dependency, revenue model, and web presence.
Last calculated: July 2026
How we score →Key Features
- Cloud Linux VMs per agent (forks)
- Isolated filesystem, services, ports, DB per fork
- Automatic local dev environment migration to cloud
- Parallel agent execution without resource conflicts
- Agents keep working when laptop is closed
- Desktop app (macOS), mobile app (iOS/Android), CLI
- Web-based terminal and inline code review
- Fork snapshot and restore
- Localhost port forwarding follows selected fork
- Scheduled and webhook-triggered agent runs
- Slack and Linear integrations
- Persistent thread list with live status
- Bring your own Codex or Claude Code subscription
- Any editor support (VS Code, JetBrains, Vim)
- SSO, RBAC, audit logs (Teams)
About Boxes.dev
Boxes.dev is a cloud-based development environment purpose-built for developers running AI coding agents like Claude Code and Codex. It replaces localhost dependencies by giving each agent its own forked Linux VM with a complete filesystem, services, ports, and database state. This means you can spin up multiple parallel agents without resource conflicts, close your laptop while they work overnight, and manage everything from desktop, mobile, or CLI. The platform targets individual developers and teams who rely heavily on AI-assisted coding and need scalable isolation. Key features include automatic migration of your local dev environment to the cloud, "forking" a primary devbox to create fully isolated cloud computers per agent, and persistent threads that let you review diffs, open terminals, and commit from anywhere. For teams, Boxes.dev offers SSO, RBAC, audit logs, spend controls, and dedicated resource pools — all while using your existing Codex or Claude Code subscription or API (no tokens sold). While tools like Cursor or Conductor offer partial cloud or parallel capabilities, Boxes.dev is unique in giving every agent a full cloud computer with its own services, databases, and ports. It also keeps agents running when your laptop is closed, supports any editor (VS Code, JetBrains, Vim), and can be integrated with Slack or Linear for scheduled or webhook-triggered workflows.
Behind the Verdict
If your workflow involves launching three, five, or a dozen Claude Code or Codex sessions at once — each doing real work on the same codebase — Boxes.dev makes that sane. The core insight is that git worktrees share a machine; forks give each agent a separate cloud VM with services, databases, and ports. That matters when agents mess with dependencies or schemas. We'd reach for this when we need a crew of agents to simultaneously refactor, add features, and fix bugs without stepping on each other. Where it bites: it's not for the casual AI dabbler. You need a Codex or Claude Code subscription already; the $19 Starter plan gives 40 box-hours (enough for light use), but heavy parallel work hits Pro at $99/mo. The free trial is generous — 10 hours — so you can test the fork workflow before committing. Compared to alternatives: Cursor's cloud agents keep working when you close your laptop but they're not isolated machines; Conductor is early access and less mature. Boxes.dev's mobile and desktop apps are a real differentiator for monitoring agents on the go. In practice, the automatic environment migration worked well in our tests, but you should audit the setup plan before approving it. If you're a solo dev running one agent at a time, skip it — a local setup with tmux is free.
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Use Cases
- Run multiple code generation agents in parallel to speed up prototyping
- Isolate each AI agent to prevent file conflicts during automated debugging
- Test agent-based code review systems in a reproducible environment
- Deploy ephemeral environments for each pull request agent analysis
- Scale agent-based refactoring across large codebases with snapshot rollback
Limitations
- No free tier; only paid plans starting at $20/month.
- Limited storage on lower tiers (10 GB for Starter).
- Concurrent box limits may restrict very large agent fleets.
- API is only available on Pro and above.
12-month cost
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