Alternatives to InstantDB
Open-source realtime database with built-in auth, permissions, storage, and multiplayer sy
InstantDB ranks #5 of 10 in Backend-as-a-service, with an Alt Score of 85. It is licensed under Apache-2.0, freemium from $30/mo and available on Web, iOS and Android. 12 of 12 checklist rows are verified against a public source.
InstantDB is an open-source backend-as-a-service focused on realtime, relational client-side queries: every query is multiplayer by default, with built-in authentication (magic codes, OAuth, guest auth), CEL-based permissions for row-level access control, file storage, and offline sync with automatic rollback. It's popular with AI-assisted and rapid-prototyping app builders (JS, React, React Native SDKs) who want a Convex/Firebase-style realtime backend without writing sync logic. It differentiates on being open source with a lightweight, prompt-friendly setup marketed specifically at AI-coded apps.
InstantDB targets frontend developers, indie hackers, and small teams building web and React Native apps who want a backend without writing server code, including those using AI coding assistants to scaffold apps.
You get a managed relational-style database with realtime, multiplayer queries (InstaQL), an auth system (magic codes, OAuth providers, Clerk, custom flows), file/object storage, a permissions rule language for access control, ephemeral presence/cursors, and an admin SDK for server-side or HTTP access. The service is open source (Apache-2.0) and can also be self-hosted via Docker.
Developers define a schema of entities and links with the Instant CLI, then read data with declarative InstaQL queries and write it with InstaML transactions from client SDKs (React, React Native, Vue, Svelte, SolidJS, TanStack, vanilla JS) or the JavaScript/Python Admin SDK. Queries stay live and update automatically as data changes, with optimistic updates and offline caching handled by the client, while server-side permission rules (written in a CEL-like language) are evaluated per object on every read and write.
Why people leave InstantDB
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Ranked alternatives
Ordered by Alt Score. Click any score to see the breakdown.
Supabase is an open-source backend-as-a-service built on PostgreSQL, providing a managed database, authentication, file storage, realtime subscriptions, edge functions, auto-generated APIs, and vector.
Appwrite is an open-source backend-as-a-service that bundles a database, authentication, file storage, realtime, serverless functions, and messaging behind REST/GraphQL APIs and client SDKs, available.
AWS Amplify is Amazon's backend-as-a-service toolkit for web and mobile apps, providing managed authentication (Cognito), auto-generated GraphQL/REST APIs (AppSync), a database (DynamoDB), file storag.
Convex is a reactive backend-as-a-service where the database, server functions, and realtime subscriptions are written in TypeScript, giving apps live-updating queries, transactional writes, file stor.
Back4app is a backend-as-a-service platform built on top of the open-source Parse Server framework, offering a managed MongoDB (and NoSQL) database, auto-generated REST/GraphQL APIs, built-in authenti.
Firebase is Google's app-development platform offering a backend-as-a-service: the Firestore and Realtime Database, Authentication, Cloud Storage, Cloud Functions, hosting, and client SDKs for web, iO.
Parse Platform (Parse Server) is a fully open-source Node.js backend-as-a-service framework, originally built by Parse Inc.
Xano is a no-code/visual backend-as-a-service platform that gives teams a managed Postgres database, auto-generated and customizable REST/Swagger APIs, built-in authentication, file storage, and a vis.
PocketBase is an open-source backend-as-a-service packaged as a single Go executable, bundling an embedded SQLite database, authentication, file storage, realtime subscriptions, and an admin dashboard.
Feature comparison
Rows come from the Backend-as-a-service checklist (16 rows). Human-verified cells only. ? means the value has not been verified.
| Backend-as-a-service checklist | InstantDB | Supabase | Appwrite | AWS Amplify | Convex | Back4app |
|---|---|---|---|---|---|---|
| Pricing model | ||||||
| Starts at | ||||||
| License | ||||||
| Platforms | ||||||
| Managed database | ||||||
| Auth built in | ||||||
| File / object storage | ||||||
| Realtime subscriptions | ||||||
| Serverless / edge functions | ||||||
| Auto-generated APIs | ||||||
| Self-hostable | ||||||
| Open source | ||||||
| Client SDKs | ||||||
| Row-level security | ||||||
| Vector / AI support | ||||||
| Free tier |
Every fact and feature listed for InstantDB is verified against its own pages. Each alternative is sourced on its own page.
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License Apache-2.0 verified 2026-07-30
Apache License Version 2.0, January 2004
https://raw.githubusercontent.com/instantdb/instant/main/LICENSE.md -
Pricing model Freemium verified 2026-07-30
Free plan ($0/mo, 1GB database space) plus paid Pro/Startup/Enterprise tiers, so classified as Freemium rather than pure Free.
Free ... $0 /month ... Pro ... $30 /month
https://www.instantdb.com/pricing -
Status active verified 2026-07-30
pushed_at": "2026-07-29T23:57:25Z", "archived": false" — Repo pushed to same-day as research; also actively publishing dated essays on instantdb.com/essays.
https://api.github.com/repos/instantdb/instant -
Starts at $30/mo verified 2026-07-30
Cheapest paid tier. Storage overage billed at $0.125/GB beyond 10GB.
Pro ... $30 /month ... 10GB database space, then $0.125 per GB
https://www.instantdb.com/pricing -
Platforms Web, iOS, Android verified 2026-07-30
Web via the React/Vanilla JS/Vue/Svelte/SolidJS/TanStack client SDKs (docs/init, start-vanilla); iOS/Android via the React Native SDK (Expo).
install the Expo Go app on iOS or Android ... npx expo run:ios # or npx expo run:android
https://www.instantdb.com/docs/start-rn -
Managed database Yes verified 2026-07-30
The best database for AI-coded apps. Instant has everything you need to build web and mobile apps with your favorite LLM.
https://www.instantdb.com/product/database -
Auth built in Yes verified 2026-07-30
Instant comes with support for auth. We currently offer Magic Codes, Guest Auth, Google OAuth, Sign In with Apple, Github OAuth, LinkedIn OAuth, and Clerk.
https://www.instantdb.com/docs/auth -
File / object storage Yes verified 2026-07-30
Instant Storage makes it simple to upload and serve files for your app. You can store images, videos, documents, and any other file type.
https://www.instantdb.com/docs/storage -
Realtime subscriptions Yes verified 2026-07-30
live queries", queries that will automatically update when data changes"
https://www.instantdb.com/docs/backend -
Serverless / edge functions No verified 2026-07-30
Site-wide product navigation (heading "Product") lists Instant's full product lineup: Database, Auth, Sync Engine, Storage, Admin SDK. No serverless/edge-functions product exists; the Admin SDK only l
Database, Auth, Sync Engine, Storage, Admin SDK
https://www.instantdb.com/pricing -
Auto-generated APIs Yes verified 2026-07-30
Clients query/write directly against the schema (InstaQL/InstaML) with no hand-written backend API endpoints required.
Instant uses a declarative syntax for querying. It's like GraphQL without the configuration.
https://www.instantdb.com/docs/instaql -
Self-hostable Yes verified 2026-07-30
Run InstantDB entirely on your own server.
https://www.instantdb.com/docs/self-hosting -
Open source Yes verified 2026-07-30
private": false ... "license": {"spdx_id": "Apache-2.0"}" — Full source at github.com/instantdb/instant, publicly readable, licensed Apache-2.0.
https://api.github.com/repos/instantdb/instant -
Client SDKs Yes verified 2026-07-30
Docs site also documents official Vue, Svelte, SolidJS, TanStack Start and Python SDKs (see start-vue, start-svelte, start-solidjs, start-tanstack, start-python).
Currently we have SDKs for Javascript, React, and React Native.
https://raw.githubusercontent.com/instantdb/instant/main/README.md -
Row-level security Yes verified 2026-07-30
Rules are per-namespace allow/deny expressions evaluated per-object (view/create/update/delete), e.g. "view": "auth.id != null", "create": "isOwner" — functionally row-level security.
To secure user data, you can use Instant's Rule Language.
https://www.instantdb.com/docs/permissions -
Vector / AI support No verified 2026-07-30
Complete enumeration of supported schema attribute types; no vector/embedding type. No vector search or AI/embeddings feature found anywhere in the docs or llms-full.txt.
Attributes can be typed as i.string(), i.number(), i.boolean(), i.date(), i.json(), or i.any().
https://www.instantdb.com/docs/modeling-data -
Free tier Yes verified 2026-07-30
Free ... $0 /month ... No credit card required, free projects are never paused, available for commercial use.
https://www.instantdb.com/pricing
FAQ
Yes. Convex, Back4app and Firebase have a free tier or are fully free. Free-tier limits in the comparison table are verified and dated.
Supabase, Appwrite and AWS Amplify — every license claim links its source.