Supabase Alternatives: Best Firebase-Style Open Source Tools in 2025

If you’re building a full-stack app and looking for a Firebase alternative, you’ve probably come across Supabase - the popular open-source backend-as-a-service (BaaS). With built-in authentication, PostgreSQL, real-time support, and edge functions, Supabase has earned its spot as a go-to backend platform for developers who want control without reinventing the wheel.

But what if Supabase isn’t the right fit for your project? Whether you're hitting performance limits, need more flexibility, or want different pricing or deployment options, this guide explores the best alternatives to Supabase in 2025.

Let’s break down the top Supabase alternatives - from open-source backends to full-stack low-code tools.

Firebase

Still the original benchmark, Firebase by Google remains a top choice if you’re looking for a tightly integrated backend service with strong support for mobile apps.

Best for: Fast prototyping, real-time data apps, mobile-first development.

Why consider it over Supabase:

• More mature ecosystem (especially for mobile)
• Built-in analytics, crash reporting, and performance monitoring
• Strong integration with Google Cloud

Limitations:

• Vendor lock-in
• No SQL database (uses Firestore/Realtime DB)
• Closed source

Appwrite

Appwrite is a strong Supabase open source Firebase alternative that offers a self-hostable BaaS built in TypeScript and Go.

Best for: Teams who want full backend control without starting from scratch.

Features:

• Self-hosted backend with Auth, DB, Storage, Functions
• Supports SQL and NoSQL (via adapters)
• SDKs for web, Flutter, Android, and more

Why consider it over Supabase:

• Flexible deployment
• Modern UI for project management
• Native Docker-based setup

Nhost

Nhost takes a similar approach to Supabase by building on top of Postgres and GraphQL. It's a compelling alternative to Supabase if you prefer GraphQL-first APIs.

Best for: Teams building JAMstack apps or GraphQL-first APIs.

Features:

• Hasura under the hood for instant GraphQL APIs
• Postgres DB, Auth, Storage, Functions
• Open source and cloud-hosted options

Why consider it over Supabase:

• GraphQL-native
• Great DX with CLI and SDKs
• Built-in migration and CI/CD features

UI Bakery

UI Bakery is not a direct backend replacement like Supabase, but rather a low-code front-end platform that integrates seamlessly with your Supabase backend- or any alternative.

Best for: Teams building internal tools or dashboards on top of Supabase or similar databases.

Why it complements or replaces Supabase:

• Connects to any REST or GraphQL API (including Supabase)
• Works with PostgreSQL, MySQL, Firebase, MongoDB, and more
• AI-powered app generation from your data schema
• SOC 2, GDPR, and on-premise ready

UI Bakery is especially useful if you want to rapidly build internal tools without coding every component from scratch. If you're switching from Supabase to another backend, UI Bakery’s flexibility helps maintain UI continuity.

PocketBase

PocketBase is a lightweight, Go-based backend ideal for solo developers or micro-SaaS projects.

Best for: Indie devs and small apps with local-first or embedded backend needs.

Features:

• Built-in SQLite DB
• Realtime subscriptions, Auth, File storage
• Can run in-browser (WASM)

Why consider it over Supabase:

• Lightweight and portable
• Single binary deployment
• No external dependencies

Backendless

Backendless offers a feature-rich BaaS with visual app development tools and database UI.

Best for: Teams that want both no-code and code-based backend workflows.

Why consider it over Supabase:

• Visual schema designer
• Built-in push notifications
• Multi-database support

Limitations:

• More opinionated architecture
• Steeper learning curve for advanced features

Conclusion

Whether you’re searching for a Supabase open source Firebase alternative, a GraphQL-first backend, or a flexible UI builder to sit on top of your data, there are plenty of options in 2025. Each Supabase alternative comes with its own trade-offs in terms of performance, complexity, and ecosystem. If you're still evaluating tools, UI Bakery is worth considering not just as an add-on but as a key piece of your new backend/frontend stack - especially if you’re moving fast and want to keep things secure, customizable, and low-code friendly.