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.

Convex is a reactive backend platform for TypeScript developers. You write queries, mutations, and actions in TypeScript. Mutations run as transactions, and client queries update automatically over WebSockets when the data they read changes. File storage, scheduled functions, cron jobs, HTTP actions, full-text search, and vector search are built in.

The Convex backend is source-available under the Functional Source License (FSL), with each release converting to Apache 2.0 after two years, and it can be self-hosted with Docker. As of October 2026, Convex also publishes components for AI agents, durable workflows, and RAG, plus an MCP server and plugins for coding agents.

The main difference is scope. Convex is centered on the backend, and DeepSpace deploys the frontend, backend, auth, and payments together as one app.

Convex offers deeper database guarantees: transactional mutations with serializable isolation and reactive queries. DeepSpace includes more of the product around the database: hosting, auth, payments, domains, and prebuilt collaboration features.

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.

Convex deploys its backend with one command too. As of October 2026 its hosting docs point frontends to Vercel, Netlify, or another static host, and a Static Hosting component can serve a static React or Vite app from a Convex deployment. For sign-in, Convex's docs recommend Clerk, WorkOS AuthKit, or Auth0 for the most complete features, which adds another service. If you already run that setup, Convex fits into it well.

Both are real-time by default, and they focus on different layers. Convex's sync engine is the deeper database. Mutations are transactions with serializable isolation, and subscribed queries rerun and update clients when their data changes. For workloads where consistency across many documents matters, Convex is a strong choice.

DeepSpace syncs shared records to React hooks and includes presence, live cursors, and collaborative text built on Yjs. A Tiptap editor and a shared canvas are available as add-on features. On Convex you would build those features from reactive queries and components. Convex is the stronger fit for complex transactional logic, and DeepSpace for multiplayer product features.

DeepSpace includes auth. Convex offers its own beta auth library or works with an outside provider. 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.

Convex Auth is in beta as of October 2026, and Convex's docs describe third-party providers such as Clerk, WorkOS AuthKit, and Auth0 as the most complete options. Those are capable products, and each is another service to set up. Authorization in Convex is code you write inside your functions. That is flexible. Convex has no built-in declarative permission layer, and its convex-helpers library offers optional row-level security wrappers.

DeepSpace has payments built in. 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.

Convex does not have built-in payments, and as of October 2026 it publishes a Stripe component. The component creates checkout sessions, manages and cancels subscriptions, opens the customer portal, and syncs Stripe webhook data into your Convex database. You still connect your own Stripe account and write the access checks that use that data.

Both support coding agents. A DeepSpace project includes an agent skill, and the CLI can return JSON for scripting. Sign-in, permission checks, and payment flows are handled inside the SDK, and the same CLI deploys the app, so an agent works with one system from build to live URL.

Convex invests heavily here. As of October 2026 it ships an MCP server, agent skills, and official plugins for Claude Code, Codex, and Cursor that let an agent inspect tables, run functions, and read logs. For AI features inside your product, its Agent component adds persistent threads, tool calls, and RAG. An agent building on Convex also sets up the frontend host and auth provider. Convex's earlier AI app builder, Chef, is deprecated.

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

Convex's free plan, as of October 2026, includes 1 million function calls and 0.5 GB of database storage, with pay-as-you-go Starter pricing beyond that. The Professional plan is $25 per developer per month with 25 million function calls included and metered overages for function calls, storage, egress, and action compute. Convex costs grow with team size and with traffic. Its per-unit prices are published, which makes them straightforward to estimate.

Choose Convex when your hardest problem is server-side data logic. If you need transactions with serializable isolation, built-in full-text or vector search, or the option to self-host your backend, Convex is the stronger fit as of October 2026. It is also a natural choice if you already deploy frontends to Vercel and use Clerk or WorkOS for auth.

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