Open-Source Databases · catfan

Medoo

Medoo is a lightweight, single-file PHP database abstraction layer that simplifies interactions with MySQL, PostgreSQL, SQLite, MSSQL, Oracle, and other databases. It provides a clean API for queries, prepared statements, and data mapping while maintaining minimal dependencies and seamless integration with popular PHP frameworks.

Talk to DEV.co Discuss Implementation

Source: GitHub — github.com/catfan/Medoo

4.9k

GitHub stars

1.1k

Forks

PHP

Primary language

MIT

License (OSI-approved)

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	catfan/Medoo
Owner	catfan
Primary language	PHP
License	MIT — OSI-approved
Stars	4.9k
Forks	1.1k
Open issues	57
Latest release	v2.4.0 (2026-05-14)
Last updated	2026-07-07
Source	https://github.com/catfan/Medoo

What Medoo is

Medoo is a PDO-based database query builder and ORM-lite framework for PHP 7.3+ that abstracts SQL across multiple database engines. It uses fluent method chains and parameterized queries to reduce boilerplate while supporting complex operations like joins, subqueries, and transactions without sacrificing code readability.

Quickstart

Get the Medoo source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/catfan/Medoo.git2cd Medoo3# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

Rapid prototyping and small-to-medium web applications

Medoo's minimal footprint and intuitive API accelerate development cycles for projects that don't require a full-featured ORM. Ideal for MVPs, content management systems, and admin dashboards where quick iteration matters.

Multi-database compatibility requirements

When application needs to run against MySQL, PostgreSQL, SQLite, or MSSQL with a single codebase, Medoo abstracts engine differences, reducing conditional logic and database-specific dialect handling.

Legacy PHP framework integration

Medoo integrates smoothly into existing Laravel, CodeIgniter, Yii, and Slim applications as a lightweight alternative to heavier ORMs, allowing gradual migration or co-existence with existing data layers.

Implementation considerations

Requires PHP 7.3+ with PDO extension; verify hosting environment supports these before deployment.
Single-file architecture simplifies deployment but may require careful version pinning in composer.json to avoid unexpected behavior shifts between minor releases.
No built-in migrations, validation, or factory patterns; teams must establish their own conventions or layer additional tools for consistency.
Parameterized queries are default, reducing SQL injection risk, but developer discipline in avoiding string concatenation remains critical.
Connection pooling, query caching, and logging are not built-in; production deployments should implement custom middleware or wrapper classes for observability.

When to avoid it — and what to weigh

Complex domain models requiring advanced ORM features — Projects with heavy polymorphism, lazy loading, query optimization hints, or intricate relationship management benefit more from Doctrine or Eloquent. Medoo excels at query-driven development, not domain-driven design.
Enterprise-scale systems with strict audit and compliance requirements — Large-scale deployments requiring detailed logging, query interception, advanced caching strategies, and governance hooks may find Medoo's simplicity limiting. Consider Doctrine or proprietary solutions for regulated environments.
Microservices with heterogeneous data stores — If your architecture spans NoSQL, graph databases, and multiple relational engines, Medoo's focus on SQL databases limits utility. A polyglot persistence framework or dedicated client libraries are more appropriate.
Teams unfamiliar with raw SQL and database abstractions — Medoo requires developers to understand SQL semantics and PDO; those accustomed to full-ORM query builders may find the transition steep. Training overhead should factor into adoption decisions.

License & commercial use

Medoo is released under the MIT License, an OSI-approved permissive license that permits free use, modification, and distribution in both personal and commercial projects with minimal restrictions. Attribution and liability disclaimers are required; no source code publication is mandated.

MIT License explicitly permits commercial use without royalty or source code escrow. No license review required for typical commercial deployment. Ensure your organization's legal team verifies compliance with any internal open-source policies, but license terms themselves impose no commercial restrictions.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Strong
License clarity	Clear
Deployment complexity	Low
DEV.co fit	Strong
Assessment confidence	High

Security considerations

Medoo uses PDO prepared statements by default, which mitigate SQL injection if used correctly. Developers must avoid string concatenation in query conditions and validate/sanitize user inputs before passing to methods. No built-in protections against timing attacks, blind injection edge cases, or other advanced attack vectors; security posture depends on application-layer practices. Connection credentials should be stored in environment variables or secure vaults, not hardcoded.

Alternatives to consider

Doctrine ORM

Full-featured, enterprise-grade ORM with rich relationships, lazy loading, and sophisticated caching. Better for domain-driven design and complex schemas; overkill for simple CRUD applications.

Laravel Eloquent (standalone)

Expressive query builder with broader ecosystem integration, model-level validation, and first-class relationship handling. Heavier footprint; more opinionated than Medoo.

Dibi (PHP database abstraction)

Similar lightweight footprint and multi-database support; slightly less modern syntax. Medoo is more actively maintained and has stronger community presence.

Software development agency

Build on Medoo with DEV.co software developers

If your team needs a lightweight, multi-database query builder with strong community support and clear licensing, Medoo merits a technical spike. Start with the official documentation and a small prototype; assess fit against your schema complexity and ORM expectations.

Talk to DEV.co

Related open-source tools

Surfaced by semantic similarity across the DEV.co open-source index.

siuba teo calcite

Related on DEV.co

Explore the category and the services that help you build with it.

Open-Source Databases Web App Development API Development Custom Software Talk to DEV.co

Medoo FAQ

Can Medoo handle transactions?

Yes. Medoo supports PDO transactions via beginTransaction(), commit(), and rollBack() methods. Refer to the official documentation for examples.

Is Medoo suitable for REST APIs?

Yes. Its lightweight nature and query-builder interface make it well-suited for API endpoints. No built-in serialization or pagination; you must implement these layers.

Does Medoo support connection pooling?

Not natively. PDO relies on the underlying database driver. For production, use external pooling (e.g., PgBouncer for PostgreSQL) or a connection manager wrapper.

What is Medoo's approach to schema migrations?

Medoo does not include migration tools. Use Laravel Artisan, Phinx, Liquibase, or custom scripts alongside Medoo. The framework assumes schema is pre-existing or managed separately.

Software development & web development with DEV.co

DEV.co helps companies turn open-source tools like Medoo into production software. Our software development services cover the full lifecycle — architecture, web development, integration, and maintenance — delivered by software developers and web developers who ship. Engage our software development agency to implement or customize it for your open-source databases stack.

Evaluate Medoo for Your PHP Project

Talk to DEV.co Schedule a Consultation