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Entity-oriented JavaScript ORM

TypeORM

An open-source JavaScript and TypeScript ORM with entity mapping, repositories, Active Record and Data Mapper patterns, migrations, and broad database-driver support.

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Editorial verdict

Choose TypeORM when entity classes, repositories, decorators, and classic ORM patterns align with the codebase and team. Prefer a SQL-oriented tool when query transparency, compile-time-only metadata, or a smaller runtime abstraction matters more.1

Best for

  • Node.js teams using entity and repository patterns intentionally
  • Applications that benefit from Active Record or Data Mapper options
  • Codebases whose required driver and runtime are supported by the selected TypeORM release
1

Not ideal for

  • Teams seeking the thinnest SQL-shaped query layer
  • Projects that want to avoid decorators, reflect metadata, and entity lifecycle behavior
  • Legacy installations moving to current 1.x without an explicit upgrade and migration review
1
Main trade-off

TypeORM provides broad entity mapping and database support, but runtime metadata, relation loading, migrations, query abstraction, and version upgrades create more behavior to validate than thinner typed SQL tools.12

Product boundary

Whether class-based entities, runtime metadata, repositories, and classic ORM mapping fit the application's domain and team conventions.

TypeORM is application software, not a database or managed service. Current 1.x documentation and legacy 0.3.x behavior must not be mixed without an explicit upgrade and compatibility review.13

For: JavaScript and TypeScript teams that deliberately want entity mapping and TypeORM's Active Record or Data Mapper workflow

  • The codebase is on legacy 0.3.x and current 1.x upgrade behavior has not been validated.
  • Decorators or reflect metadata conflict with the runtime or build system.
  • Critical queries repeatedly escape the entity abstraction.
  • The selected database driver does not support the required feature set consistently.

Why teams consider TypeORM

  • Entity mapping patternsTypeORM supports entities, relations, repositories, Active Record, and Data Mapper.13
  • Broad driver surfaceCurrent documentation lists multiple relational databases plus MongoDB and multiple JavaScript runtimes.13
  • Integrated database workflowTypeORM includes a query builder, transactions, migrations, connection pooling, and related ORM facilities.123

Pricing

TypeORM is open-source under the MIT license with no separate software license fee. Database hosting, drivers, migrations, support, and upgrade engineering are separate costs.3

Library adoption

Open-source TypeORM

No separate ORM software license fee; the team pays for database infrastructure and its own implementation, migration, and upgrade work.3

License
MIT3
Current compatibility boundary
TypeORM 1.x documentation is current; 0.3.x is presented as legacy3
Pricing checked View official pricing

TypeORM vs alternatives

Prisma ORM

Choose when
Choose it when a declarative schema and generated client are preferable to runtime entity metadata.
Compared with TypeORM
The application adopts Prisma's generated workflow and connector boundary.4

Drizzle ORM

Choose when
Choose it when SQL-like typed access and TypeScript schemas matter more than entity lifecycle.
Compared with TypeORM
The team owns more SQL and database-specific detail.5

Kysely

Choose when
Choose it when a thin typed query builder is sufficient.
Compared with TypeORM
The application owns model, relation, and migration workflow beyond the builder.6

Resources and sources

Official product, policy, and pricing

  • TypeORM getting started
    Open
  • TypeORM migrations
    Open
  • TypeORM MIT license
    Open
  1. 1
    TypeORM getting started

    TypeORM · Accessed Official

  2. 2
    TypeORM migrations

    TypeORM · Accessed Official

  3. 3
    TypeORM MIT license

    TypeORM · Accessed Official

  4. 4
    Prisma ORM overview

    Prisma · Accessed Official

  5. 5
    Drizzle ORM overview

    Drizzle Team · Accessed Official

  6. 6
    Kysely introduction

    Kysely · Accessed Official