Best 12 Open Source Databases Tools in 2026
Last Updated: October 24, 2025
Some teams prefer full control and transparency over their database technology rather than relying on a proprietary system. Open Source Databases offer freely available, community maintained database software that can be self hosted or run through a managed provider.
These databases are widely used by developers and organizations that value transparency, flexibility, and freedom from vendor lock in. A strong open source community also means ongoing improvements and a wide base of shared knowledge to draw on.
Appwrite
AppwriteOpen-Source Backend Platform for Apps, 
Supabase
SupabaseOpen-Source Backend Platform with Postgres Database, and 
Nhost
NhostOpen Source Backend Platform with GraphQL are the best for Open Source Databases. So, let’s take a closer look at all 12 tools.
Appwrite is a backend platform that handles all the technical work behind your apps. Instead of building everything yourself, you get pre-made systems for common needs like storing user data, managing files, and handling authentication. Think of it as a toolbox filled with everything your app needs to work properly.
The platform works with many programming languages and frameworks, so you can use the tools you already know. You can add features like user sign-up, password recovery, database storage, and file uploads with just a few lines of code.
Appwrite can be installed on your own servers or used through their cloud service. Both options give you the same features, but self-hosting means you keep complete control over your data and how everything runs.
Supabase is a complete backend platform that gives you all the tools needed to build modern applications. At its core is a Postgres database, which is known for being stable and feature-rich. You can store data, create tables, and manage relationships without writing complex code.
Beyond the database, Supabase includes user authentication with support for email, social logins, and phone numbers. It also has file storage for images and documents, real-time features for live updates, and edge functions to run custom code. Everything connects through simple APIs that are automatically created from your database structure.
What makes Supabase different is that it is completely open-source. You can host it yourself or use their cloud service, and you never get locked into their platform.
Nhost is a complete backend service that provides everything needed to build modern applications. You get a PostgreSQL database, a real-time GraphQL API, user authentication with multiple sign-in options, file storage for images and documents, and the ability to run custom code.
Unlike traditional backend setup that requires technical expertise in servers and security, Nhost handles all of this automatically. The platform is fully open-source, meaning you own your data and can move it anywhere without being locked into one provider.
It runs on cloud servers with automatic backups and updates. You can develop your project locally on your computer, then deploy it with a simple push to GitHub. Everything scales automatically as your user base grows.
PocketBase is a backend solution that puts all essential backend features into one small file. Unlike traditional backends that need multiple services and databases, PocketBase includes an embedded SQLite database with real-time updates, built-in user authentication, file storage system, and a web-based admin panel.
The tool is designed to be simple. You download one file, run it, and your backend is ready. It supports over 15 login methods including email, password, and social logins like Google, Facebook, and GitHub. Developers can interact with it through easy REST APIs or use the official JavaScript and Dart libraries.
PocketBase is self-hosted, meaning you control your data and can run it on your own server or computer.
SurrealDB is a database that handles multiple types of data storage without needing different database systems. Think of it as one tool that can work like a traditional database with rows and columns, a document store like MongoDB, and a graph database for connected data—all at the same time.
It is built with Rust programming language, which makes it fast and reliable. You can use it directly from web browsers, mobile apps, or servers. The database includes built-in security features, so you can control who sees what data without writing extra code.
SurrealDB supports real-time updates, meaning your application sees changes instantly without constantly checking for updates. This makes it perfect for chat apps, live dashboards, and similar tools.
Parse Platform is an open-source Backend-as-a-Service framework that runs on Node.js. It provides a complete backend solution without needing to write everything from scratch. You can store data, handle user accounts, send push notifications, and manage files all through one system.
The platform supports both MongoDB and PostgreSQL databases, giving you flexibility in how you store information. It includes Parse Server for the backend logic, Parse Dashboard for visual management, and software libraries for connecting different types of apps. These libraries work with iOS, Android, JavaScript, PHP, and many other languages.
Being open-source means it is completely free to use, and you have full control over your data and servers.
Qdrant is a vector database that stores and searches high-dimensional data using advanced technology. Unlike traditional databases that store exact text or numbers, Qdrant works with vectors—mathematical representations of complex information. This makes it perfect for finding similar items based on meaning rather than exact matches.
The database uses a special algorithm called HNSW that makes searches incredibly fast, even with billions of data points. It supports different ways to measure similarity between items, including options for text, images, and other data types.
Qdrant includes features like data compression to save memory, filtering to narrow down results, and the ability to scale up as your needs grow. You can use it through a simple web interface or integrate it directly into your applications using various programming languages.
Zitadel is a tool that manages who can log into your application and what they can do once inside. You can set it up to handle user accounts, control access to different features, and keep track of security events. Unlike building your own login system, Zitadel provides everything ready to use.
It supports modern login methods like social accounts (Google, Facebook), company systems (Microsoft, Okta), and passwordless options using fingerprints or face recognition. The platform uses standard protocols that work with any application, so your app simply talks to Zitadel without needing custom code for each login method.
There is a free tier that works for small projects, and paid plans that add more users, better support, and advanced features for growing businesses.
Weaviate is a database designed specifically for AI applications that need to understand the meaning behind data. Unlike regular databases that only match exact words, Weaviate can find information based on what you mean, not just what you type.
It combines traditional database features with vector search technology. This means you can store documents, images, or any type of data, and then search through them using natural language or by similarity. The database handles millions or even billions of items quickly, usually returning results in less than 100 milliseconds.
You can use it for many purposes: building chatbots that answer questions accurately, creating search engines that understand context, making recommendation systems, or organizing large amounts of unstructured data like documents and images.
Milvus is a database specifically built to store and search vector embeddings. When you use AI models to process text, images, or other data, they create numerical vectors that represent the meaning of that data. Milvus organizes these vectors so you can quickly find similar items.
Unlike traditional databases that work with exact matches, Milvus excels at finding items that are similar in meaning. For example, it can find pictures that look alike or text passages with related concepts, even if the exact words are different.
The database is completely free and open source under Apache 2.0 license. It runs on your own servers or in the cloud, giving you full control over your data and how the system operates.
Juno is a developer platform that combines the ease of traditional cloud services with the benefits of blockchain technology. It provides all the tools you need to build modern applications: user authentication, data storage, file hosting, website deployment, and serverless functions.
What makes Juno special is that everything runs on blockchain in containers you own. This means no company controls your data or can shut down your app. Your users get better privacy because their information stays secure and private by default.
The platform is open source and runs on the Internet Computer Protocol, which allows your websites and apps to run entirely from blockchain without depending on traditional web hosting. Developers can use familiar coding patterns while getting blockchain benefits automatically.
SinglebaseCloud is a complete backend platform that lets you build AI applications with modern features. It provides a vector database for storing AI embeddings, a NoSQL database for regular data, user authentication, file storage, and AI tools like similarity search and RAG pipelines.
The platform supports multiple AI models from providers like OpenAI, Anthropic, Gemini, Mistral, Llama, Cohere, and Deepseek. This means you can build smart applications that understand context, search through documents, and generate responses using the latest AI technology.
You can access all features through simple APIs using GraphQL, SQL, or REST. There are software development kits for JavaScript, TypeScript, and Python, making it easy to connect your applications to the platform.
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Open Source Databases