The React PaaS that deploys on every git push
Push your React app to Git. Upsun builds, deploys, and scales it, with preview environments that mirror production.
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What Upsun is
Upsun is a cloud application platform that runs your app in production. Push your code and Upsun handles the build, the deploy, and the scaling. No dedicated DevOps team required.
Everything your React app needs, managed for you
Git push to deploy
Connect your repository. Every push builds and deploys automatically. Define your stack, React version, dependencies, and services, in one declarative YAML file, versioned right alongside your code.
Preview environments that mirror production
Every branch and pull request gets a full stack environment cloned from production, data and services included. Catch the problems before they ship, not after.
Your frameworks, your services, your cloud
Add PostgreSQL, Redis, or Celery in a line of config. Deploy to AWS, GCP, or Azure, and switch anytime. No lock in.
Scales when you do
Horizontal and vertical scaling, built in observability, and daily backups keep production steady. Support is available around the clock.
From repo to running in three steps
- Connect your Git repository. GitHub, GitLab, or Bitbucket.
- Describe your app in YAML. React version, dependencies, and any services you need.
- Git push. Upsun builds, deploys, and hands you a live URL with a preview environment for every branch.
See it in code
One file defines your runtime, dependencies, and services, all in version controlled YAML, ready to commit alongside your app.
More than React hosting
Hosting hands you a server and leaves the rest to you. Upsun runs the whole application lifecycle: build, deploy, preview, and scale, with no servers to patch and no pipeline to maintain.
63%Faster deployments
Push your code and Upsun provisions infrastructure, spins up services, and deploys your application automatically.
<1 minPreview environments
Spin up production-identical clones with real data, configs, and files for every branch.
99.99%Uptime SLA available
Run multiple sites and customer instances with confidence. Built for reliability at portfolio scale.
This morning, we launched a new development environment to test a disruptive feature. That would've been a huge ordeal in our old setup. Now it's just part of the workflow.
Geoff Douglas
VP of Engineering, MarketNation
React on Upsun. Common questions.
Which React versions are supported?
React itself is just an npm package, not a platform runtime, so there's no version pinning on Upsun's side. What matters is the Node.js version used to build it, which you specify and Upsun keeps patched automatically.
Does Upsun support server-side rendering, static generation, and API routes?
Yes. Whatever tool you use to build your React app (Vite, CRA, or others), Upsun just needs the output directory it produces. Once built, the app is served as static files directly, no ongoing server process required.
Can I run background workers, queues, or cron?
Only if paired with a separate backend app. A plain React app is static and client-side only, it has no server-side process to run workers in. If your project also has an API backend, that backend app is where workers and cron would run, not the React app itself.
Is the free trial really free? Do I need a credit card?
The free trial runs for 15 days. You don't need to add a credit card to start.
Can I deploy to my own cloud and choose a region?
Yes. Deploy to AWS, GCP, or Azure, and choose from multiple regions based on proximity to your users. Some regions also qualify for a sustainability credit on your resource usage.
How is this different from Heroku or from plain hosting?
You get preview environments that clone production, multi cloud with no lock in, and the full lifecycle in one platform.