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MikroORM

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TypeScript ORM for Node.js based on Data Mapper, Unit of Work, and Identity Map patterns.

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Tracked since2026
0 reviews tracked

The Bottom Line

Entry price

Free, no paid tier

Biggest pro

Reduces boilerplate code with TypeScript type-based entity definitions.

Biggest con

Requires familiarity with ORM concepts like Data Mapper and Unit of Work.

TL;DR - MikroORM

  • TypeScript ORM for Node.js with Data Mapper, Unit of Work, and Identity Map patterns.
  • Supports multiple SQL and NoSQL databases, including MongoDB, MySQL, PostgreSQL.
  • Automates transactions, schema generation, migrations, and query batching.
Pricing: Free forever
Best for: Individuals & startups

What is MikroORM?

Editorial review
MikroORM is a TypeScript Object Relational Mapper (ORM) designed for Node.js applications. It implements the Data Mapper, Unit of Work, and Identity Map patterns to provide a robust and efficient way to interact with various databases. It aims to reduce boilerplate code by leveraging source code analysis for entity definitions, allowing developers to define entities using standard TypeScript types. This ORM is suitable for developers building Node.js applications who need a powerful and flexible solution for database interaction, supporting both SQL and NoSQL databases. Its key benefits include automatic transaction handling, schema generation, migration management, data seeding, and automatic query batching, which contribute to more maintainable and performant applications.

Available on: Web

how we evaluateSourcemikro-orm.io ↗

Pros & Cons

Pros

  • Reduces boilerplate code with TypeScript type-based entity definitions.
  • Offers broad database support for both relational and non-relational databases.
  • Enhances performance through automatic transaction handling and query batching.
  • Provides comprehensive tools for schema management, migrations, and data seeding.
  • Flexible query options with QueryBuilder and global filters.

Cons

  • Requires familiarity with ORM concepts like Data Mapper and Unit of Work.
  • Learning curve for new users due to its feature set and patterns.
  • Reliance on TypeScript for optimal experience.

Key Features

Implicit TransactionsDRY Entities (source code analysis)Supports SQL and NoSQL databases (MongoDB, MySQL, PostgreSQL, MS SQL Server, SQLite)SchemaGenerator for prototyping schemasMigrator for generating migration diffsEntityGenerator for introspecting database schemasSeeder for generating fake dataAutomatic Batching of queries

Pricing

Free

MikroORM is completely free to use with no hidden costs.

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MikroORM FAQ

What is MikroORM?

MikroORM is a TypeScript Object Relational Mapper (ORM) for Node.js applications. It helps developers interact with databases using object-oriented programming concepts, implementing Data Mapper, Unit of Work, and Identity Map patterns.

How much does MikroORM cost?

MikroORM is an open-source project and is available for free.

Is MikroORM free?

Yes, MikroORM is a free and open-source ORM.

Who is MikroORM for?

MikroORM is for Node.js developers who use TypeScript and need a robust, feature-rich ORM to manage database interactions, supporting various SQL and NoSQL databases.

Source: mikro-orm.io

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