Best Free Database Software and Open Source Database Tools

You do not need to spend a penny to run a capable database in 2026, but picking the wrong free tool will cost you time, migration headaches, and more than a few late nights.

Whether you are building a web app, tracking leads, managing projects, or storing structured data for a startup, there is a free database option that fits. Some are fully open source with no usage ceiling. Others are cloud-hosted with generous free tiers. A few are no-code platforms that non-developers can actually use without a computer science degree.

This guide covers the best free database software available today, what each free plan actually includes, and which tool makes sense for your use case.

Free Database Tools at a Glance

The best free database software includes PostgreSQL, MySQL, MongoDB Atlas, Supabase, SQLite, and Airtable, each suited to a different type of user and workload.

PostgreSQL: The Developer’s First Choice

PostgreSQL is completely free, fully open source, and has no usage limits when self-hosted, making it one of the most powerful free database options available today.

PostgreSQL is an open source object-relational database system with over 35 years of active development, earning a strong reputation for reliability, feature robustness, and performance. It runs on Linux, macOS, and Windows and handles everything from small personal projects to large-scale production applications.

What makes PostgreSQL stand out is not just the price tag. It is the depth. You get full ACID compliance, support for complex queries, JSON storage, full-text search, and an extension ecosystem that includes tools for geospatial data, time-series analytics, and more.

As of 2025, PostgreSQL is on major release version 18, which introduces asynchronous I/O, enabling users to perform concurrent tasks like readahead and sequential scan more efficiently.

Who it is for: Backend developers, data engineers, and any team building a production-grade application that needs a battle-tested relational database without a licensing bill.

Limitations to know: PostgreSQL is self-hosted, so you manage installation, backups, and scaling yourself. If you want a managed cloud version, providers like Supabase and Neon offer free tiers built on top of Postgres.

Official site

MySQL Community Edition: The Web Developer Standard

MySQL Community Edition is free, open source, and licensed under the GNU GPL, with no row limits, no seat limits, and no expiry.

MySQL Community Edition is the free, open source distribution of MySQL, licensed under the GNU General Public License. It is widely used in development and production and is supported by a large and active community of open source developers.

MySQL has powered the backend of some of the most visited websites on the internet for decades. It sits at the heart of the classic LAMP stack (Linux, Apache, MySQL, PHP) and remains a default choice for WordPress, Joomla, and most shared hosting environments.

Key strengths:

Fast read performance, ideal for web applications with high query volumes Excellent compatibility with PHP frameworks and CMS platforms Large community, abundant documentation, and decades of community support Runs on Linux, Windows, macOS, and FreeBSD

Who it is for: Web developers, WordPress site owners, and teams running CMS-based platforms or PHP applications.

Limitations to know: Advanced features like enterprise backup, monitoring advisors, and the enterprise firewall are locked to MySQL’s paid commercial editions. For most developers, the Community Edition covers everything they actually need.

Official downloads

PostgreSQL vs MySQL: Quick Comparison

MongoDB Atlas: Free Cloud NoSQL Database

MongoDB Atlas offers a free forever cloud tier with 5 GB of storage, no credit card required, and no expiry date.

MongoDB Atlas encourages developers to explore, build, and scale with three distinct tiers including Free, Flex, and Dedicated. The Free tier is designed for experimenting with MongoDB and building small applications at no initial cost, and it remains free forever.

MongoDB is a NoSQL database, which means it stores data as flexible JSON-like documents rather than rigid rows and columns. That makes it a natural fit for modern web and mobile applications where data structures change frequently during development.

As of May 2025, MongoDB was the fifth most popular database software globally, focusing mostly on managing large databases of unstructured data. It is typically used for mobile and web apps that commonly use unstructured databases.

What the free Atlas tier includes:

5 GB of storage on a shared cluster Available on AWS, Google Cloud, and Azure Built-in authentication, data explorer, and connection monitoring No time limit, the free cluster does not expire

Who it is for: App developers building MVPs, side projects, or prototypes that need a cloud-hosted NoSQL database without running their own server.

Limitations to know: The free tier does not include backup services, and the shared cluster infrastructure means performance is not guaranteed under heavy load. For serious production traffic, the Flex or Dedicated tier is the better fit.

Official site 

Supabase: Free Postgres in the Cloud

Supabase gives developers a fully managed PostgreSQL database for free, with up to 2 active projects and 500 MB of database storage per project.

Supabase’s free plan allows up to 2 active projects, with free projects paused after 1 week of inactivity. That last point is worth highlighting before you build on it. If your project sits idle, Supabase will pause it automatically. A quick visit wakes it back up, but it is something to plan around.

Beyond the database itself, Supabase bundles a generous set of tools into the free tier that most developers would otherwise pay for separately. You get authentication, auto-generated REST and GraphQL APIs, real-time subscriptions, edge functions, and file storage, all included at no cost.

As of January 2025, Supabase relaxed its free plan database size limit to 500 MB per active project, rather than 500 MB across the entire organisation, meaning each project gets its own 500 MB allowance.

What the free Supabase tier includes:

2 active projects (paused after 1 week of inactivity) 500 MB database storage per project 1 GB file storage 50,000 monthly active users for authentication Auto-generated REST and GraphQL APIs Edge functions and real-time support

Who it is for: Full-stack developers and indie hackers who want a managed Postgres backend with auth and API tooling included, without paying for multiple separate services.

Limitations to know: The inactivity pause is the biggest issue on the free tier. If you need your project live around the clock without manual intervention, the Pro plan at $25 per month removes that restriction entirely.

Official pricing 

MongoDB Atlas vs Supabase Free Tier: Quick Comparison

SQLite: The Database That Needs No Server

SQLite is a free, open source, serverless database engine that stores your entire database as a single file on disk, with no installation, no configuration, and no running process required.

Unlike PostgreSQL or MySQL, SQLite does not run as a separate server. It is an embedded database, meaning it runs inside your application itself. That sounds limiting until you realise that SQLite is the most widely deployed database engine in the world. It powers browsers, mobile apps, operating systems, and embedded devices, including every iPhone and Android phone in existence.

For developers building desktop applications, local tools, prototypes, or lightweight web apps with low concurrent traffic, SQLite removes every barrier. There is nothing to install beyond a single library file, and the entire database lives in one portable file you can copy, share, or back up instantly.

What you get for free:

Completely free with no licence fees, ever Zero configuration, no server process to manage Cross-platform support on Windows, macOS, Linux, iOS, and Android Full SQL support including joins, triggers, and transactions Single-file database format, easy to back up and move

Who it is for: Developers building desktop apps, local tools, mobile applications, or any use case where a single user or low-concurrency workload is the norm. It is also excellent for prototyping before migrating to a full server-based database.

Limitations to know: SQLite is not designed for high-concurrency workloads where multiple users write to the database simultaneously. If your application needs dozens of concurrent write operations, PostgreSQL or MySQL is the better choice. SQLite also has no built-in user management or network access by design.

Airtable: Free Database for Non-Technical Teams

Airtable’s free plan gives non-developers a spreadsheet-style relational database with unlimited bases, up to 1,000 records per base, and support for up to 5 editors, with no SQL required.

Airtable sits in a category of its own. It is not a developer database. It is a no-code platform that looks and feels like a spreadsheet but behaves like a relational database underneath. You can link records between tables, build custom views, create forms, and automate basic workflows, all through a point-and-click interface.

Airtable’s free plan is suitable for individuals or small teams managing basic projects, offering unlimited bases with up to 1,000 records per base, 1 GB of attachments per base, 100 automation runs, and support for up to 5 editors.

That 1,000-record limit is the main constraint to plan around. A small business tracking leads, customers, and prospects typically adds 150 to 300 new contacts per month, meaning you will hit the 1,000-record wall in around 3 to 7 months on the free plan. For a content calendar or internal reference list, the free plan lasts considerably longer.

What the free Airtable plan includes:

Unlimited bases 1,000 records per base 1 GB attachment storage per base Up to 5 editors 100 automation runs per month Kanban, calendar, and grid views Interface Designer access

Who it is for: Marketing teams, operations staff, project managers, freelancers, and anyone who needs a structured database they can use without writing a single line of code. Particularly useful for content calendars, lightweight CRM setups, event tracking, and inventory lists at small scale.

Limitations to know: The free plan restricts users to a maximum of 5 editors, 1,000 records per base, 100 automation runs per month, and 2 weeks of revision history. Once you outgrow those limits, the Team plan starts at $20 per seat per month.

Official pricing

SQLite vs Airtable: Quick Comparison

Frequently Asked Questions