Deploy to your own server with one command.
No Docker. No cloud platforms. No DevOps required.
Runs on any server — €4/mo VPS Cloud VM Home server
A cheap VPS, a cloud machine, or a box under your desk. Point your domain to it. Takes two minutes. You only do this once.
Use any AI tool — Claude, Cursor, ChatGPT — to build what you need. A habit tracker, an internal dashboard, a meal planner. Whatever.
Run sandcastle deploy and get a real URL with HTTPS in seconds. Share it with your team, your family, or the world.
Sandcastle is where those apps live. Your server, your data, your rules. No subscriptions. No platforms that own your work.
You see one command. Sandcastle handles the rest.
Each app gets its own address with automatic HTTPS. Share the link with anyone.
A shared dashboard showing everything running on your server. Browse and visit all apps in one place.
Make apps public, password-protected, or private to specific users. Different apps, different rules.
Every app runs in its own secure sandbox. A broken prototype won't take down your production tool.
Apps can save data that persists — perfect for trackers, dashboards, and anything that needs to remember.
See changes instantly as you work. When you're happy, one command makes it live.
Works with Claude and other AI tools via MCP. Build and deploy in one conversation.
One person manages the server. Everyone else just deploys. No technical knowledge needed after setup.
If someone on your team can follow a 2-minute install guide, everyone benefits.
Rapid prototyping, internal tools, hackathon projects. No DevOps bottleneck.
Meal planners, baby trackers, household tools — built exactly how you want.
Teacher sets up once. Students deploy projects and see each other's work.
Side projects on your own infra. Full control. No vendor lock-in.
Open source. MIT licensed. Your server, your apps, your rules.