mikro-orm/mikro-orm

Health v2 · maintenance only

Adoption not part of the score

9184 stars · 666 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

MikroORM is a TypeScript ORM for Node.js based on Data Mapper, Unit of Work, and Identity Map patterns. It supports SQL databases (PostgreSQL, MySQL, MariaDB, SQLite, libSQL, MSSQL, Oracle) as well as MongoDB, with type-safe queries, migrations, and schema tooling.

Use cases

• manage postgresql entities in a typescript node.js app
• type-safe orm with automatic change tracking and transactions
• run database schema migrations for a node backend
• use an orm with mongodb in typescript
• seed test data with entity factories
• generate entities from an existing database schema
• build a fastify api with sqlite and vitest

When to choose

• you want a fully type-safe ORM in TypeScript with multiple entity definition styles
• you need Unit of Work/Identity Map semantics with implicit transactions on flush
• you need first-class support for both SQL databases and MongoDB
• you want built-in migrations, schema generation, and seeding tooling

When to avoid

• you prefer an Active Record pattern ORM
• your project is plain JavaScript without TypeScript and you don't need type safety
• you need a lightweight query builder without entity management overhead
• you use a database not among the supported drivers

Facets

library · maturity stable

orm database database-driver cli developer-tools databases backend web-development developer-tools cross-platform data-mapper unit-of-work identity-map entity-management schema-migrations query-builder mongodb postgresql mysql sqlite libsql mssql oracle type-safe-queries seeding nodejs typescript javascript

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