DeepSpace is a full-stack SDK and hosting platform for real-time React and TypeScript apps. One npm package, deepspace, includes a real-time database, sign-in, presence, collaborative editing, file storage, and Stripe payments. One command, npx deepspace deploy, puts the frontend and backend live at <name>.app.space.

DeepSpace is designed for AI coding agents. New projects include an agent skill, and CLI commands can return JSON. Permission checks, identity verification, and payment flows are handled inside the SDK, so agents do not rewrite them for each project.

Supabase is an open-source backend platform built on Postgres. Every project gets a dedicated Postgres database with auto-generated REST and GraphQL APIs, plus authentication, file storage, edge functions, and real-time subscriptions, with access controlled by Row Level Security (RLS) policies written in SQL.

As of October 2026, new Supabase projects run Postgres 17, and the platform also offers vector storage, cron, queues, and database branching. The core stack is open source and can be self-hosted with Docker.

The main difference is scope: DeepSpace builds, hosts, and deploys your entire app, while Supabase provides the backend and leaves the frontend to another platform. DeepSpace does not offer full SQL or self-hosting. It deploys the whole app with one command.

Supabase gives you a full Postgres database. DeepSpace gives you hosting, collaboration features, and payments in one deploy.

Yes, when you are shipping a complete app. npx deepspace deploy builds the frontend, provisions the backend, and puts the app live at <name>.app.space in one step. Auth and the database need no extra accounts or keys. To take payments, you connect a Stripe account once.

Supabase does not host frontends: as of October 2026 its official guidance points to platforms like Vercel or Netlify, so a complete app uses at least two services. If you only need a database behind an app you already host, Supabase covers that on its own.

DeepSpace ships application-level collaboration features, and Supabase ships transport-level real-time channels. In DeepSpace, shared records sync to React hooks automatically. Presence, live cursors, and collaborative text built on Yjs (a CRDT library) are included, and a Tiptap editor and a shared canvas are available as add-on features.

Supabase Realtime provides Postgres Changes, Broadcast, and Presence. These are solid building blocks, and you assemble the collaboration behavior yourself. Its capacity is also plan-based: as of October 2026 the free tier allows 200 concurrent connections and 100 messages per second, and the Pro plan allows 500 connections unless you disable its spend cap. For a multiplayer app, check those numbers against your expected concurrency early.

Both platforms include authentication, and they differ in how you express permissions. DeepSpace ships sign-in with Google and GitHub, with sessions handled by the platform. Permissions are role-based rules, such as viewer, member, and admin, declared next to each collection's schema and enforced on the server.

Supabase Auth is broader: around 20 OAuth providers, SAML SSO, MFA, and 50,000 free monthly active users as of October 2026. Its authorization model is Row Level Security: SQL policies evaluated per row. RLS is more expressive than DeepSpace's role rules, and it is also more to get right: policies are hand-written SQL, and Supabase itself ships tooling for testing them.

DeepSpace has payments built in. Supabase does not have a payments product. In DeepSpace you declare subscription plans and one-time products in code, and they sync to Stripe when you deploy. Hooks and a pricing table component handle checkout. Server helpers check subscriptions and handle refunds and cancellations.

With Supabase you integrate a payment processor yourself: webhook handlers in edge functions, entitlement tables, and the RLS policies that protect them are your code to write and maintain.

Both support coding agents. A DeepSpace project includes an agent skill, and the CLI can return JSON for scripting. Permission checks, sign-in, and payment flows are handled inside the SDK, so an agent does not rewrite them for each project.

Supabase is investing here too: as of mid-2026 it ships integrations for AI coding agents such as Claude Code and Cursor. An agent can drive either platform. With Supabase, it also has to set up a separate frontend host and payment integration.

Both have free plans. DeepSpace is free to start building and deploying, and paid plans add more deployed apps and usage as you scale.

Supabase's free tier, as of October 2026, includes 2 active projects, a 500 MB database, and 50,000 monthly active users. Free projects pause after one week of inactivity. The Pro plan starts at $25 per month with metered overages for disk, egress, file storage, and log ingestion. Supabase publishes detailed per-unit prices, which makes costs easy to estimate.

Choose Supabase when your product is built around Postgres. If you need raw SQL (joins, constraints, extensions), an existing Postgres toolchain, self-hosting for compliance, or auth at the scale of tens of thousands of monthly active users, Supabase is the stronger fit as of October 2026. It is also the natural choice when your frontend already lives on Vercel or Netlify and you only want a backend behind it.

Choose DeepSpace when you are building a real-time web app and want auth, sync, payments, and hosting on one platform.