The best open source alternative to Firebase is Supabase. If that doesn't suit you, we've compiled a ranked list of other open source Firebase alternatives to help you find a suitable replacement. Other interesting open source alternatives to Firebase are: PocketBase, Appwrite, Turso, and Zitadel.
Firebase alternatives are mainly Backend-as-a-Service (BaaS) Tools but may also be PaaS & Deployment Tools or Relational Databases (SQL). Browse these if you want a narrower list of alternatives or looking for a specific functionality of Firebase.
A powerful, scalable backend platform offering real-time databases, authentication, storage, and serverless functions for rapid development.

Supabase is an open-source platform that revolutionizes backend development, providing developers with a comprehensive suite of tools to build modern applications quickly and efficiently. At its core, Supabase offers:
Supabase combines these features into a cohesive, developer-friendly platform that scales with your needs. Whether you're building a small prototype or a large-scale application, Supabase provides the tools and flexibility to bring your ideas to life quickly and efficiently. With its open-source nature, you benefit from a transparent, community-driven ecosystem and the freedom to self-host or use the managed cloud service.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
A lightweight, self-hosted backend solution with real-time database, authentication, and file storage capabilities.

PocketBase is a revolutionary open-source backend solution that simplifies application development by providing a powerful, all-in-one platform. Packaged as a single executable file, it offers a real-time database, authentication system, and file storage, making it an ideal choice for developers seeking efficiency and ease of use.
Key benefits of PocketBase include:
PocketBase empowers developers to build feature-rich applications without the complexity of traditional backend setups. Its lightweight nature and comprehensive feature set make it an excellent choice for both beginners and experienced developers looking to streamline their development process.
Open-source development platform with built-in backend infrastructure, web hosting, and security features. Scale applications using your preferred programming languages.

Appwrite is a comprehensive open-source development platform that provides everything developers need to build and scale applications efficiently. The platform combines backend infrastructure, web hosting, and security features in a single, unified solution.
Key benefits include:
The platform has helped companies like DevKind reduce development time by 60% and K-Collect cut infrastructure costs by 700%. With thousands of developers already using Appwrite, it's trusted by organizations worldwide for both passion projects and enterprise applications.
Pricing options range from free for small projects to custom enterprise solutions, making it accessible for teams of any size. The platform's Swiss Army Knife approach lets you choose and use only the tools you need, reducing complexity while maintaining powerful functionality.
Turso provides a simple developer experience with SQLite compatibility, allowing you to build and scale multi-tenant applications with unlimited databases.

Turso is a powerful database solution designed for developers who want the simplicity of SQLite with the scalability needed for production environments.
Here's why Turso stands out:
Multi-tenant AI Applications: Turso enables you to create personalized LLM instances with infinite context windows using unlimited databases. This feature is perfect for building AI-powered applications that require separate data stores for each user or context.
On-Device Capabilities: Turso offers SDKs for mobile and on-device AI, allowing you to build powerful offline-capable apps across major platforms. You can optimize LLMs locally using Turso's SQLite-based database within your application, ensuring data privacy and reducing network latency.
Vector Search Integration: Seamlessly integrate Vector Embeddings with relational data in single transactions. This feature is crucial for AI and machine learning applications that require efficient similarity searches.
Open Source and Secure: Built on libSQL, an open-source SQLite-compatible database engine, Turso ensures your data is always portable. It offers encryption at rest and in transit, with SOC2 and HIPAA compliance available out of the box.
Developer-Friendly Experience: Enjoy a simple developer experience that feels like working with SQLite. Turso provides flexible development options, allowing you to work locally or remotely and deploy globally when ready.
Scalability and Performance: With features like automatic sync and programmable conflict resolution, Turso keeps your app data fresh and consistent across multiple instances. Its API-first approach and platform API enable efficient, programmatic database management at scale.
Whether you're building a complex AI application, a mobile app with offline capabilities, or a scalable multi-tenant system, Turso provides the tools and flexibility to meet your database needs while maintaining the simplicity developers love about SQLite.
ZITADEL provides a comprehensive identity management solution with easy APIs, customizable workflows, and serverless deployment options.

ZITADEL is an all-in-one identity suite designed to streamline application development with robust authentication and authorization capabilities.
Key features:
ZITADEL empowers developers to offload complex identity tasks while maintaining adaptability. With security defaults and custom code extensions, it provides a solid foundation for building scalable applications with sophisticated user management.
Whether you need authentication for a small project or enterprise-grade identity infrastructure, ZITADEL offers the flexibility to grow with your needs. Focus on building your core product features while ZITADEL handles the intricacies of identity management.
Ory is a certified and battle-tested identity solution backed by a large open source community and trusted by Fortune 500 companies.

Ory provides a modern and modular approach to identity and access management (IAM) that scales, offers unmatched user experience and deployment flexibility, and only charges for what is used.
Key benefits of Ory include:
Ory allows you to build a unified identity system that meets all your needs, whether you're looking for authentication, authorization, user management, or a complete IAM platform. With options for self-hosting or using the managed Ory Network, you can get started quickly and scale seamlessly as your needs grow.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
Open-source reactive database that keeps your web and mobile apps in sync. Write everything in TypeScript with built-in auth, cron jobs, and AI integration.

Build your entire backend in pure TypeScript - from database schemas to queries, authentication to APIs. Your backend code lives alongside your frontend code with full type safety and AI-powered code generation.
Real-time synchronization guaranteed - your app automatically reflects changes to frontend code, backend code, and database state instantly. No need for complex state managers, cache invalidation policies, or manual websocket setup.
Backend essentials built-in - create cron jobs, trigger AI workflows, leverage built-in authentication, and access a growing ecosystem of components that solve common backend needs with simple npm installs.
Developer-friendly features:
Enterprise-ready security with SOC 2 Type II compliance, HIPAA compliance, and GDPR verification. Trusted by developers who want the simplicity of Firebase with the power and flexibility of a modern TypeScript-first platform.
Instant is a database solution for building real-time and offline-enabled applications, simplifying the development of collaborative products.

Instant is a revolutionary database solution designed for developers building real-time and offline-enabled applications. It simplifies the process of creating collaborative products like Notion or Figma by providing a database that can be subscribed to directly in the browser.
Key features and benefits:
Realtime Updates: Instant handles optimistic updates and rollbacks automatically, allowing developers to focus on writing frontend code without worrying about complex backend logic.
Multiplayer Support: Built-in infrastructure for collaborative experiences, including live updates across devices and user accounts.
Offline Mode: Applications built with Instant work seamlessly offline, with local caching and automatic reconciliation when users come back online.
Easy Integration: Developers can write relational queries directly in their app, and Instant takes care of the rest, including servers, auth, permissions, and endpoints.
Scalability: Start without a backend and scale to complex use cases as needed. Instant provides an admin SDK for custom backend logic when required.
Enhanced User Experience: Easily implement features like shared cursors, typing indicators, and presence information with minimal code.
Cross-Platform Compatibility: Works across web and mobile platforms, allowing developers to reuse data logic across different environments.
Instant is backed by Y Combinator and has received praise from industry leaders, including the co-founder of Firebase and engineers from Meta, Stripe, and OpenAI. The team behind Instant consists of senior and staff engineers from Facebook and Airbnb, bringing deep expertise to solve one of the largest problems in frontend development today.
By using Instant, developers can significantly reduce development time and complexity, focusing on building great user experiences rather than dealing with the intricacies of real-time data synchronization and offline support.
A powerful platform for building cloud backends, automating infrastructure, and simplifying development workflows for faster, more efficient coding.

Encore revolutionizes backend development by providing a seamless, integrated platform that combines the power of cloud infrastructure with the simplicity of local development. By abstracting away the complexities of distributed systems, Encore allows developers to focus on writing business logic while automatically handling scalability, deployment, and infrastructure management.
Key benefits of Encore include:
By choosing Encore, teams can significantly reduce time-to-market, improve code quality, and focus on delivering value to their users instead of wrestling with infrastructure complexities.
Fully managed backend infrastructure with built-in authentication, database, storage, and serverless functions for rapid application development.

NHost is a comprehensive serverless backend platform designed to accelerate modern application development. By providing a fully managed infrastructure, NHost eliminates the complexities of backend setup and maintenance, allowing developers to focus on building exceptional user experiences.
Key benefits of NHost include:
NHost's platform is designed to be developer-friendly, offering comprehensive documentation, SDKs for popular frameworks, and a supportive community. Whether you're building a startup MVP or scaling an enterprise application, NHost provides the tools and infrastructure to bring your ideas to life quickly and efficiently.
Open-source, Pusher-compatible WebSockets server that's simple, fast, and resilient for building real-time applications.

Soketi is a powerful open-source WebSockets server designed for building real-time applications with ease. Here are some key benefits:
Blazing fast performance: Built on uWebSockets.js, Soketi delivers exceptional speed, outperforming alternatives like Socket.IO by up to 10x.
Cost-effective scaling: Achieve virtually unlimited connections and messages on affordable cloud instances, making it significantly cheaper than competitors.
Pusher Protocol compatibility: Seamlessly integrate with existing Pusher-based projects by simply swapping credentials and updating the host/port.
Flexible deployment options: Whether you're using containers or monoliths, Soketi offers multiple installation and configuration methods to fit your infrastructure.
Built-in monitoring: Leverage Prometheus metrics for comprehensive deployment monitoring and optimization.
Production-ready: Designed for both local development and demanding production environments, Soketi provides the resiliency and speed required for high-scale applications.
With its simplicity, performance, and scalability, Soketi empowers developers to create robust real-time experiences without the complexity or cost of traditional solutions.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
Lightweight Firebase alternative with database, auth, storage, and workflows. Framework-agnostic backend that integrates with NextJS, Remix, Hono and more.

BKND is a comprehensive backend solution designed for modern developers who need flexibility without complexity. This lightweight Firebase alternative provides all essential backend services while maintaining the freedom to deploy anywhere.
Core Features:
Built for Modern Development:
The platform offers complete extensibility through its workflow builder, allowing you to inject custom logic into system events. As an open source solution, you maintain full control over your backend while benefiting from community contributions.
Get started instantly with npx bknd@latest run and experience a backend that adapts to your needs, not the other way around.
Build and manage custom databases with ease, create type-safe APIs, and develop applications quickly

Undb is an innovative open-source platform that empowers users to build and manage their own databases without coding. This local-first, offline-first solution offers a range of powerful features:
Undb combines the flexibility of no-code tools with the power of a backend-as-a-service, making it an excellent choice for developers, businesses, and individuals looking for a self-hosted Airtable alternative. Whether you're managing projects, organizing data, or prototyping applications, Undb provides the tools to streamline your workflow and boost productivity.
Hydra embeds DuckDB's state-of-the-art analytics engine into standard Postgres, offering millisecond response times for complex queries.

Hydra is an innovative open-source project that combines the power of PostgreSQL with DuckDB's high-performance analytics engine. This hybrid solution allows developers to build faster applications with advanced analytical capabilities right within their Postgres database.
Key features and benefits:
Millisecond response times: Hydra's integration of DuckDB's columnar-vectorized query engine enables lightning-fast analytics on large datasets.
Seamless Postgres integration: Developers can leverage familiar Postgres interfaces and tools while gaining access to DuckDB's analytical prowess.
Open-source and MIT licensed: Hydra is freely available and can be used, modified, and distributed under the permissive MIT license.
Scalability: From laptop to cloud, Hydra is designed to handle varying workloads and data sizes efficiently.
Object storage connectivity: Easily connect with popular object storage solutions like S3, Cloudflare R2, Google GCS, and Azure.
Feature-rich SQL: Take advantage of advanced SQL features for complex data analysis and manipulation.
Zero dependencies: Hydra integrates seamlessly into existing Postgres setups without requiring additional dependencies.
Hydra is backed by Y Combinator and has garnered support from industry leaders, including the DuckDB Foundation, Dagster, Svix, and HashiCorp. Its ability to handle both transactional and analytical workloads in a single database makes it an attractive solution for companies looking to simplify their data architecture while improving query performance.
The project is actively developed and maintained, with regular updates and improvements. Developers can contribute to the project, join the community on Discord, or become supporters to help drive the future of this innovative database solution.
Nitric automates cloud infrastructure provisioning from your application code for AWS, GCP and Azure

Nitric is an open source universal backend framework that provides infrastructure from code and pluggable deployment automation. It allows developers to declare infrastructure requirements in code for common cloud resources and provides a convenient interface to interact with them.
Key benefits of Nitric include:
Effortless infrastructure from code: Use code to declare infrastructure requirements and get deployment automation from customizable plugins. This simplifies provisioning and managing cloud resources.
Cloud portability: Nitric makes applications portable across cloud providers, unlocking access to the best cloud features without vendor lock-in. It supports AWS, Google Cloud, and Azure out of the box.
Local development: Fine tune your application offline from your first commit. Prototype, develop and test your application without incurring cloud costs.
Simplified security: Application security is made simple with declarative resource access that is automatically synced with deployment automation.
Intuitive APIs: Common tasks are made intuitive and easy, without limiting fine-grained control when needed.
Extensible automation: Use existing Nitric plugins or build custom ones. Nitric enhances automation tools like Terraform, Pulumi and others.
Nitric supports key cloud resources like APIs, storage, databases, messaging, and more. It provides a consistent developer experience for working with these resources across different cloud providers.
The framework aims to streamline backend development by abstracting away infrastructure complexities, while still giving developers full control when needed. This allows teams to focus more on building application logic rather than managing cloud infrastructure.
Open-source serverless platform for developers to build, test, and deploy modern apps with authentication, storage, hosting, and analytics - all without backend setup.

Build modern applications without the complexity of backend infrastructure. Juno provides everything you need to create secure, scalable projects with zero DevOps overhead.
Core Features:
Developer-Friendly Experience:
Use your favorite frontend frameworks while Juno handles the backend complexity. Quick project scaffolding with npm create juno@latest gets you started in minutes, not hours.
Built for Scale: Whether you're prototyping an MVP or deploying production applications, Juno's decentralized architecture ensures your apps remain secure and performant as they grow.