Replicas
Spawn Claude Code and Codex agents in isolated cloud VMs
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Replicas runs Claude Code, Codex, and other coding agents inside isolated cloud VMs with full development environments ready to go. A task is handed off from Slack, Linear, or GitHub, and a pull request comes back ready to review.
Each agent gets its own sandbox: dependencies install, the database spins up, and the codebase runs locally inside the VM. Users bring their own API keys or subscriptions and pay only for the compute time used during active runs.
Backed by Y Combinator, it is aimed at engineers who want background agents working on real tasks without losing isolation or context, on infrastructure that is neutral about which agent runs.
AI-assisted draft, human-reviewed before publishing — see how we choose & review tools.
Why we picked it
Replicas earns its spot for the hand-off-to-PR loop specifically — a task assigned from Slack or Linear coming back as a ready-to-review pull request, with the database and dependencies already running inside the VM, is worth naming as the part that actually closes the loop.
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