Replicas
Run Claude Code and Codex in the cloud
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Garry Tan

Replicas - Run Claude Code and Codex in the cloud

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Y Combinator
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Run background coding agents from anywhere. Spawn Claude Code or Codex in a VM with code and tooling ready to go. Hand off tasks from Slack, Linear, or GitHub Replicas runs Claude Code, Codex, or any coding agent in the cloud. Agents run in isolated VMs with real dev environments, and you can bring your own subscriptions and API keys. Trigger tasks from Slack, Linear, or GitHub and come back to a PR ready to review.

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Connor Loi
Maker
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Hey Product Hunt! 👋 I'm Connor, CEO of Replicas, here with my co-founder Saai. We're super excited to finally share Replicas with this community. Why we built this Like many of you, we think the future of software engineering is delegating to fleets of cloud agents. Engineers are already using their preferred harnesses: Claude Code, Codex, Opencode, Pi, and others everyday. But back then, no one had made a good way to use them on cloud. Every existing solution either locks you into one specific harness, or forces you to run agents locally on your machine. That means your agent stops the moment you close your laptop. And if you want multiple agents running at once, you're left wrangling git worktrees, hoping your computer doesn't crash, and buying a clamp to keep your computer open. What Replicas does Replicas runs your agents in isolated cloud VMs. Each one gets its own full dev environment, installs your dependencies, spins up your database, and runs your actual codebase locally inside the sandbox. It works with Claude Code, Codex, OpenCode, and more. You bring your own API keys or subscriptions, so you only pay for the infrastructure. Trigger it from wherever you already live: mention @replicas in a GitHub PR, ping it in Slack, assign a Linear issue, or hit the API. You come back to a PR ready to review. What we've seen We dogfood this hard: 95% of our own lifetime PRs were shipped with Replicas, and we haven't opened a single one without it in the last 3 months. Our customers average 30% of PRs through it too; teams like Mintlify, Knowunity, and Composio. The use cases have gone way beyond what we initially imagined: personalized code review, automated code quality checks in CI, security reviews and pentests, auto-triaging issues, and teams running around-the-clock on-call support engineers. This is just the beginning of what's possible when you can run agents in parallel, in the background, around the clock. We'd love to hear how you're thinking about AI agents in your stack! Drop a comment or just come say hi, we're here all day. 🙏
Tobias Herber

Looks awesome. Congrats on the launch 🎉

Connor Loi
Maker

@tobihrbr Thanks Tobias!

Ivan Zvonar

Congratulations on the launch!

We use replicas in our day-to-day work to develop multiple features in parallel. It also enables us to do multiplayer, where the product and engineering teams hand off the session back and forth as the development progresses.

We absolutely love the fact that it doesn't lock us into a bad in-house harness, since they just allow us to use the ones from big AI labs. This is a huge benefit, because it means the features that the labs come up with are available right away — we don't have to wait months for the in-house harness to catch up. Another super nice thing is that we're able to preview the work live directly in Replicas via remote desktop or use SSH.

Cloud agents are the next big thing in the AI coding world, and Replicas is the best one out there right now. Excited to see where it ends up!

Connor Loi
Maker

@nevecex Thanks Ivan, its been amazing building Replicas for the team!

Erik Dahl

Oh, so excited to see you guys launching!

I’ve been using replicas for all my PR reviews. They have a great set of automations and my agent auto resolves.

Not to meant really frictionless integrations with Linear and Slack. I do most a lot of coding tasks from Slack now.

Zach Waterfield

We’ve been using it and loving it! We kick off the cloud agents via Linear and Slack and it’s been seamless. The warming is key, we can run the app to test and full integration tests before it commits.

Connor Loi
Maker

@zlwaterfield Thanks Zach!

Matthew Eggertson

Been using Replicas for months and love it. This has let me kick off multiple changes and bug fixes in parallel without worrying about managing or coordinating test environments.

Hammad Shami

Been using this CONSTANTLY since it dropped. Mintlify gets a huge amount of shipped volume w/ Replicas.

Thanks Connor and Saai <3

Connor Loi
Maker

@h2shami Couldn't do it without you <3

Ada Johnsen

The cloud VM approach makes sense especially when multiple agents need to run in the background without depending on someone's laptop. How does Replicas handle conflicts when two agents are working on related parts of the same codebase?

Connor Loi
Maker

@ada_johnsen Hey Ada! Totally agree. The first take here is that AI agents have made dealing with merge conflicts a much easier game. Replicas actually has a built in feedback loop, where it automatically reacts to CI failures, code reviews, and in this case merge conflicts. This means that two different agents will resolve automatically with zero human friction.

Additionally, complete isolation means these agents can test changes end-to-end without conflicts, until they're ready to merge.

Alina Tyslenok

The idea of agents continuing to work after I close my laptop is surprisingly compelling. Feels like a natural next step beyond local AI coding tools. Congrats on the launch!

Connor Loi
Maker

@alina_tyslenok_ Thanks Alina! It's definitely the future :p

Anand Thakkar

Isolated VMs per agent run is the right model for correctness. It eliminates state bleed between runs and makes failures clean to recover from. We've hit friction with stateful runners where a mid-task failure left dirty workspaces that blocked the next run entirely. How do you handle dependency caching across VM instances when agents need to install packages mid-task?

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