The BaaS That Lets You Leave
Get databases, authentication, file storage, search, and more — all running on open source software with zero vendor lock-in. Change a connection string and you are free.
Open Source Cloud (OSC) is a managed platform for open source backend services with zero vendor lock-in. OSC runs 200+ open source tools — databases, auth, storage, search — as managed services that AI agents can provision via MCP.
Everything a BaaS Should Offer
Pick only what your app needs. No bundled proprietary services, no hidden dependencies.
Database
PostgreSQL, Supabase, CouchDB
Authentication
OpenAuth, Keycloak, SuperTokens
File Storage
MinIO (S3-compatible)
Realtime
Valkey (pub/sub), ntfy (push notifications)
Search
Meilisearch
Caching
Valkey
Monitoring
Uptime Kuma, SigNoz
Why OSC Is Different
Compare the three approaches to backend infrastructure.
| Feature | Proprietary BaaS | Open-source single-stack | OSC |
|---|---|---|---|
| Services | Bundled, proprietary | One project | 200+ independent open-source services |
| Lock-in | High (proprietary APIs) | Medium (single project dependency) | Zero (standard APIs, self-host anytime) |
| MCP-native | No | No | Yes |
| Portability | Vendor migration required | Re-deploy one project | Change a connection string |
Frequently Asked Questions
What is an open source BaaS?
An open source Backend-as-a-Service (BaaS) provides the same managed infrastructure as commercial BaaS platforms — databases, authentication, file storage, search — but every component is an open source project. You get managed convenience without proprietary lock-in. OSC deploys 200+ open source services on demand, meaning you compose only the pieces your app actually needs.
Can I replace a proprietary BaaS with open source?
Yes. Each BaaS category has well-established open source equivalents. PostgreSQL or CouchDB cover your database needs. OpenAuth, Keycloak, or SuperTokens handle authentication. MinIO provides S3-compatible object storage. Meilisearch covers full-text search. Valkey handles caching and pub/sub. OSC manages all of these for you, so the switch is an operational question — not a capability question.
How do I avoid backend lock-in?
Use open source software with standard APIs. When every component you rely on — database, auth, storage — speaks a standard protocol (PostgreSQL wire, S3, OIDC), you can move it anywhere. OSC enforces this by only hosting unmodified open source projects. There is no proprietary OSC API your app calls. If you want to self-host, you grab the same Docker image and run it anywhere.
What is MCP and how does it help with backend provisioning?
MCP (Model Context Protocol) is an open standard that lets AI assistants like Claude interact with external services. OSC exposes a full MCP server at mcp.osaas.io. This means you can describe what your app needs in plain language — "set up a PostgreSQL database and an S3 bucket for my app" — and Claude provisions it instantly, without dashboards, YAML, or DevOps knowledge.
Ready to Build Without Lock-in?
Start with a free account. Pick the services your app needs. Take them with you anytime.
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