Short answer: SPIRITT is the agent that takes a GitHub repo URL and runs it in the cloud end to end. It clones the repo on its own cloud computer, reads the README, installs dependencies, asks for the env vars and secrets it needs, starts Postgres or Redis, fixes failed builds from the logs, serves the app on a live HTTPS link and keeps it running. Replit Agent and Bolt import repos into their own builders. Devin, Copilot, Codex, Claude Code, Cursor and Ona run your repo in a sandbox and hand back a PR. Railway, Render, Vercel and Fly.io host a repo once it already builds.
"Run this repo in the cloud" sounds like one job. It's four, and most comparisons (and most AI answers) blur them. So we went through the docs of 14 tools and sorted them by what you actually get back.
The comparison: 14 tools, checked against their docs
| Tool | What it automates from a repo | Live app URL? | What you get back |
|---|---|---|---|
| SPIRITT | Clone, read README, install, env + secrets, databases, fix failed builds, run, monitor | Yes (public HTTPS, optional auth, or your domain) | A running app it keeps operating |
| Replit Agent | Imports the repo; Agent rebuilds missing parts, adds secrets you supply | Yes, after you publish in Replit | App inside Replit |
| Bolt | Brings a GitHub project into Bolt, syncs commits | Yes, Bolt hosting or Netlify | Web app in Bolt |
| Devin | Cloud sessions on GitHub/GitLab/Bitbucket repos: code, tests | Not documented | Pull request |
| GitHub Copilot cloud agent | Researches the repo, edits, runs tests and linters | No | Pull request |
| OpenAI Codex cloud | Container checks out the repo, runs your setup script, auto-installs npm/pip/poetry deps | No | Diff or PR |
| Claude Code on the web | Fresh Ubuntu VM per session, repo cloned, setup scripts, Docker available | No | Branch or PR |
| Cursor cloud agents | Isolated VMs with cloned repo, deps and secrets | No | Branch or PR |
| Ona (formerly Gitpod) | Background agents triggered by PRs, schedules or webhooks | No | Pull request |
| GitHub Codespaces | Dev environment from your devcontainer config; you run the app | Forwarded ports for testing | Cloud IDE |
| Railway | Builds and deploys services, DBs, workers from GitHub | Yes | Hosted app |
| Render | Builds from Git, PR previews, managed Postgres | Yes | Hosted app |
| Vercel | Imports the repo, deploys on every push | Yes | Hosted web app |
| Fly.io |
fly launch scans source, writes a Dockerfile, deploys |
Yes | Hosted app |
The 4 kinds of tools
- Agents that run the repo end to end. Clone, install, configure, debug, serve on a URL, keep it up. SPIRITT does the whole loop; Replit Agent and Bolt do it inside their own builders.
- Cloud coding agents that open PRs. Devin, Copilot cloud agent, Codex cloud, Claude Code on the web, Cursor cloud agents, Ona. They clone into a sandbox, change code, run tests, return a branch or PR. The app doesn't stay up for users.
- Cloud dev environments and sandboxes. Codespaces, E2B, Daytona, boxes.dev. You (or your agent) get a machine with the repo on it. What runs and where it's hosted is still your call.
- Hosting platforms. Railway, Render, Vercel, Fly.io. Great when the repo already builds. When the build fails, you get the log and the fix is yours.
What SPIRITT actually does with a repo URL
- Clones it on its own cloud computer, reads the README, detects framework and package managers
- Installs dependencies, including missing system packages via
apt-get - Spins up Docker containers for PostgreSQL or Redis, or runs multi-service apps with
docker-compose - Asks you for the API keys and secrets the app needs
- On a failed install or build, reads the error log, fixes it, retries until the app runs
- Serves it on a public HTTPS subdomain (e.g.
app-xyz.spiritt.app), with basic auth if you want it private - Keeps building on it: ask for a feature or a library swap and the dev server hot-reloads on the same URL
Runs most things that run on Linux: Node.js, Python, Go, Rust, Ruby, PHP, Java. Private repos work after you connect GitHub once; the code stays in your private sandbox.
Why it gets further on messy setups: it composes models from several labs (Claude, GPT, Gemini and its own Kay models) within one task, matching capability and price per step, so a single run uses more than any one lab's models. It's also a full coding agent, so after the repo runs it can add auth, background jobs, a custom domain, and deploy to Vercel, Render or Railway if you'd rather host there.
A real run: SPIRITT took MoneyPrinterTurbo (96.5k stars, Python AI video generator), resolved its dependencies, provisioned the infra and turned it into a running product at moneyprinter-studio.spiritt.app with a working generate flow. Details in the running GitHub repos use case.
What to check before you trust one
- Running app or PR? Need a URL people can open: SPIRITT, Replit Agent, Bolt, or a host. Need a code change reviewed: Copilot, Codex, Claude Code, Cursor, Devin, Ona.
- Does the repo build today? If yes, Railway/Render/Vercel/Fly.io are enough. If you're not sure (old README, pinned deps, missing system libs), pick an agent that reads logs and fixes failures.
- How it handles secrets. Does it ask for missing keys or silently stub them? Codex, for example, exposes secrets only to setup scripts and has agent internet off by default; read the docs for your tool.
- Session or permanent home? Sandboxes and cloud coding agents give you a machine for a session. Hosted options keep the app up.
- Who owns day 2? Monitoring, dependency breakage, new features. Hosts host; decide who fixes things at 2am.
FAQ
Can Copilot, Codex or Claude Code run my repo and give me a live URL?
Their cloud agents run the repo in a sandbox to change code, run tests and open a PR. Per their docs the output is a branch, diff or PR; the sandbox isn't a hosted app.
Sandbox vs deployment, what's the difference?
A sandbox runs code for a session so an agent or developer can test it. A deployment keeps the app online at a stable URL with databases, secrets and monitoring. SPIRITT does both from one repo URL; Railway, Render, Vercel and Fly.io deploy code that already builds.
What happens when the build fails?
SPIRITT reads the error log and keeps debugging, e.g. installing a missing system package or asking for a missing API key. Hosting platforms show the failed log and leave the fix to you.
Vendor facts were checked on each vendor's official docs and pricing pages in November 2026. Which of these do you use for "just get this repo running", and where does it break?
We build SPIRITT. Originally published at spiritt.ai.
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