A Supabase alternative built as one system
Supabase is an open-source backend suite around standard Postgres. Scalix is a cloud platform written as a single system, where the database sits beside containers, functions, storage, auth and AI inference behind one API key and one bill. If you are weighing a Supabase alternative, the honest question is which shape your project needs.
This page follows the same rule as every comparison we publish: claims about Supabase come from their own documentation, cited inline, and the rows where Supabase is ahead say so. Three of their features we simply do not have, and the FAQ below names them.
Where the differences are real.
An open-source backend suite built around standard Postgres: database, auth, storage, edge functions and realtime, each a component you enable.
A cloud platform written as one system: database, containers, functions, storage, auth and AI inference behind one gateway, one key and one usage ledger.
The core is open source and self-hostable from public repositories, with a large community around it.
Closed core. Open tooling at the edges (SDKs, CLI), but you cannot run the engine from source. Sovereignty needs are answered by Scalix regions on dedicated or partner infrastructure instead.
Standard Postgres, typically exposed to clients through auto-generated APIs behind row-level security policies.
A purpose-built storage engine speaking the Postgres wire protocol on 16, 17 and 18, with point-in-time recovery and database branching built into the same machinery. Apps connect over an ordinary TLS DSN.
Edge functions for server-side code. Long-running containers are not the product; app hosting lives elsewhere in your stack.
Containers with stable URLs, autoscaling and rollbacks (Scalix Run), serverless functions, and persistent Linux machines with real ssh, all beside the database on the same key.
Vector storage via pgvector and integrations that call third-party model providers with their keys.
First-party inference endpoint behind the same gateway and key, metered into the same ledger as compute and storage. pgvector is available on every supported major.
Ships an official MCP server focused on the database and project management.
MCP spans the platform: deploy and roll back services, run queries and migrations, branch databases, manage storage, domains and usage, with destructive SQL held behind a confirmation step.
Many regions on major public cloud infrastructure, years of production history, and a very large community.
One EU region today on dedicated infrastructure we operate, India next, built by a two-engineer team that launched this year. On maturity there is no argument to have.
A US company running on US hyperscaler infrastructure, with regions in many jurisdictions.
EU and Indian operating companies, no US parent, dedicated European infrastructure we operate ourselves, and a model built to run Scalix regions inside partner data centres.
Choose Supabase if
- You want an open-source stack you can read, fork or self-host from source.
- Realtime subscriptions or auto-generated REST and GraphQL APIs are load-bearing in your architecture.
- You need a specific region today; their coverage is far wider than ours.
- You want the maturity of a large community and years of production history behind every component.
Choose Scalix if
- Your stack needs more than a backend: containers, functions, storage and AI inference under the same key as the database.
- An AI agent operates your infrastructure, and you want the whole control plane reachable over MCP with human approval on destructive actions.
- Data residency and operator sovereignty drive the decision: EU-operated infrastructure, EU and Indian entities, no US parent.
- You want database branching and point-in-time recovery as part of the platform rather than assembling backups yourself.
- You would rather hold one credential and read one bill than reconcile several.
Asked and answered straight.
Is Scalix a Supabase alternative?
For hosted Postgres with auth and storage around it, yes. Both give you a Postgres database, application auth and object storage under one account. The difference is shape: Supabase is an open-source backend suite built around standard Postgres, while Scalix is a closed-core cloud platform written as one system, where the database sits beside containers, serverless functions and AI inference behind a single API key and a single bill.
Does Scalix have authentication like Supabase Auth?
Yes. Scalix ships first-party app auth: signup and login, sessions, MFA and social login, behind the same API key as the rest of the platform. What Scalix does not replicate is the PostgREST pattern of exposing the database directly to browsers behind row-level security policies. On Scalix your application or your functions talk to the database over the standard Postgres wire protocol.
What Supabase features does Scalix not have?
Three honest gaps. Realtime channels and database change subscriptions: Supabase has them, Scalix does not. Auto-generated REST and GraphQL APIs from your schema: same. And the open-source core: Supabase can be self-hosted from public source, while the Scalix engine is closed core. If any of those three is load-bearing for you, Supabase is the better fit today.
Can I self-host Scalix like I can self-host Supabase?
Not in the download-and-run sense. The platform is designed to run as managed Scalix regions, including inside a partner data centre operator’s own facility, operated as part of the Scalix fleet. If your reason for self-hosting is data residency or sovereignty, that is the conversation to have with us. If your reason is running everything from source yourself, Supabase is the honest recommendation.
How do I migrate from Supabase to Scalix?
The database part is standard Postgres tooling: pg_dump from Supabase, pg_restore into a Scalix database over an ordinary TLS DSN, or logical replication for a smaller cutover window. Auth users and storage objects are application-level migrations, exported from Supabase and imported through the Scalix APIs. There is no proprietary wire format on either side of the database move.
Which PostgreSQL versions does Scalix support?
PostgreSQL 16, 17 and 18. You choose the major when the database is created and it stays fixed for the life of that database, so branches and point-in-time restores always replay on the major that wrote the data. pgvector, pg_trgm and the contrib set are available on every supported major.
Do Supabase and Scalix both work with AI agents over MCP?
Both ship an official MCP server, and the honest difference is scope. Supabase’s MCP server is focused on the database and project management. The Scalix MCP surface spans the platform: an agent can deploy and roll back a container, run queries and migrations, branch a database, create a storage bucket, invoke a function, add a domain and check its own usage, all with one key, with destructive SQL held behind a confirmation step.
Where does each platform run?
Supabase runs on major public cloud infrastructure across many regions worldwide, which is a real advantage if you need a specific market today. Scalix runs one EU region on dedicated infrastructure we operate ourselves, with India next, under EU and Indian operating companies rather than a US parent. If data residency drives the decision, that difference in operating model is the point; if region count drives it, Supabase wins today.
Try the one-system shape.
A database on Postgres 16, 17 or 18, containers, functions, storage and inference behind one key. No card to start, and the two engineers who built it answer the hard questions.
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