blitz.cloud FAQ - hosting, Docker, databases, pricing and GDPR

blitz.cloud is a hosting platform run by BlitzWorks in Germany. You can put public Docker images and open-source apps online under your own free address, with managed databases and automatic HTTPS. Below are short answers to the questions people ask most; each links to the page with the details.

About blitz.cloud

What is blitz.cloud?

blitz.cloud is a hosting platform where you claim an address like lena.blitz.cloud and run apps under it. Today that means public Docker images from Docker Hub and 13 open-source apps from the App Store, with managed PostgreSQL, MariaDB and Redis databases, automatic HTTPS and nightly database backups. It is built and operated by BlitzWorks UG in Regensburg, Germany.

Is blitz.cloud related to Blitz.js, blitz.dev or StackBlitz?

No. blitz.cloud is an independent product of BlitzWorks UG and has no connection to Blitz.js, blitz.dev, StackBlitz or Bolt. See about.

Who is blitz.cloud for?

People who want their own apps online without running a server: developers with a side project or a small API, self-hosters who want Vaultwarden or Uptime Kuma without a home server, and anyone in the EU who prefers their data in Germany.

Is blitz.cloud production ready?

It's in public beta. The hosting, databases and backups run for real, but several features are still missing, including builds from GitHub, custom domains and backups of app files. Check what's live before you put something important on it.

Pricing

Is blitz.cloud free?

Yes. The free plan costs 0 EUR, needs no credit card and has no time limit. It includes 15 apps, 2 GB of reserved memory, 10 GB of storage and one managed database. See pricing.

Is there a paid plan?

A Pro plan at 5 EUR per month is planned, with 50 apps, 4 GB of memory, 50 GB of storage and five databases. It can't be bought yet.

Do free apps go to sleep?

No. Apps keep running whether or not anybody visits them. There is no cold start on the first request.

Is there a bandwidth limit?

There's no bandwidth quota or traffic bill today.

Deploying

Can I deploy any Docker image?

You can deploy public images from Docker Hub that are built for amd64 and can run as a non-root user. Private images and other registries such as ghcr.io aren't supported yet. See deploy a Docker image.

Why does my Docker image not start?

The three usual reasons: the image needs root, it is only built for arm64, or it listens on a different port than the one chosen. The app page says which in a sentence and shows the last log lines. See app status and logs.

Can I deploy from GitHub with git push?

Not yet. It is the next feature in development. Until then, build a Docker image, for example with GitHub Actions, push it to Docker Hub and deploy that image.

Can I host a Node.js, Python or Go app?

Yes, as a Docker image. Package the app in an image that listens on a port such as 8080 and runs as a non-root user, push it to Docker Hub as a public image, and deploy it from the dashboard.

Can I host a static website?

Yes, inside a small web server image such as nginxinc/nginx-unprivileged, which runs without root and listens on port 8080. Put your built files into the image and deploy it like any other.

Does blitz.cloud support serverless functions?

No. blitz.cloud runs long-running containers, not functions. Your app runs all the time, so there are no cold starts.

Can I connect an AI assistant like Claude?

Not yet. An MCP server that lets assistants manage your apps is planned.

Databases and backups

Which databases does blitz.cloud offer?

PostgreSQL 17, MariaDB 11.4 and Redis, served by Valkey 8. MongoDB is not offered. See databases.

Can I connect to my database from my computer?

No. Databases have no public address and only accept connections from apps in your own account.

Are my databases backed up?

Yes. Every running database is copied off our servers every night, and the free plan keeps 7 nights. PostgreSQL and MariaDB can be restored with one button. See backups.

Are my app's files backed up?

Not yet. Files your app keeps on disk survive restarts, but they are not copied anywhere. Keep your own copy of anything important.

Addresses and domains

Do I get HTTPS?

Yes. Every address and every app subdomain gets HTTPS from a Let's Encrypt certificate that is issued and renewed automatically.

Can I use my own domain?

Not yet. Custom domains are planned, with one included on the free plan. Today every app gets a subdomain under your address, like blog.lena.blitz.cloud.

Can I change my address?

Yes, once every 14 days. Your apps move to the new name, and the old name is held for you for 30 days. See addresses and HTTPS.

Data and privacy

Where is my data stored?

In Hetzner's data centre in Falkenstein, Germany. Database backups are stored in separate Hetzner storage. See data and GDPR.

Is blitz.cloud GDPR compliant?

blitz.cloud is operated by a German company, keeps data in Germany and uses no US cloud provider for hosting. Account emails are sent through Resend, and image detection uses OpenRouter with public image metadata only. For a data processing agreement, write to hallo@blitzworks.io.

Can hosted apps run as root or access the server?

No. Every app runs in a gVisor sandbox as a non-root user, with default-deny network rules between accounts.

How do I delete my account?

Write to hallo@blitzworks.io from your account's email address. A delete button in Settings is planned.

How do I move my apps away from blitz.cloud?

Your Docker images stay on Docker Hub, and your environment variables are visible on each app's Environment tab. There's no export button for databases and files yet, so write to hallo@blitzworks.io and we help you get your data out.