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Sequelize

Long-established promise-based ORM for Node.js with models, associations and migrations, for PostgreSQL, MySQL, MariaDB, SQLite and SQL Server.

Visit sequelize.org ↗Alternatives
Works with AI agents:CLI
Ask your AI about this, with this page as the source:ChatGPT ↗Claude ↗Perplexity ↗

Where it fits

Database Access & ORMs · Schema-first ORMModels, associations and migrations in plain JavaScript Node.js apps, especially existing Express codebases.Trade-off: Built before TypeScript was common, so typing is added on and query results are weakly typed; the next major version has been in alpha for years.

How Sequelize itself is built

1 tools, from its own code, website and Product Hunt page.

Netlify

Who uses it

No maker's live product on record yet, and 20 open-source projects that declare it in their code.

Declared in code 20How evidence is collected →

We haven't found a maker's live product that uses Sequelize yet — only the open-source projects below, which declare it in their code.

JavaScriptStudyJavaScript的学习代码总结，高级特性、数据结构、设计模式、typescript、vue、angular、react、node、webpack、weex、小程序、tens…Database Access & ORMsIn its code · source ↗

Open source: a project that declares Sequelize as a dependency in its public code — verifiable, but not necessarily a live product.

Reliability and open issues

Most wanted on GitHubOpen on 2026-10-04 in sequelize/sequelize, with activity in the last year — issues and feature requests by 👍.

Alternatives to Sequelize

All alternatives by situation →
PrismaA schema-first ORM with generated types and migrations.Open sourceFree tier37 makers · database access & ORMs
Drizzle ORMA thin, SQL-like TypeScript ORM that runs well on serverless and edge runtimes.Open sourceFree tier10 makers · database access & ORMs
KyselyA type-safe SQL query builder for TypeScript, with no schema file or code generation step of its own.Open sourceFree tier
SQLAlchemyPython backends (FastAPI, Flask, scripts) that want an ORM or a SQL toolkit over any relational database.Open sourceFree tier
TypeORMClass-and-decorator entities in TypeScript, especially in NestJS apps.Open sourceFree tier

Questions makers ask about Sequelize

Is Sequelize free?

Yes — it is free, open-source software.

Is Sequelize open source or self-hostable?

Open source, and you can self-host it. source ↗

Can AI coding agents work with Sequelize?

It has an official CLI (sequelize-cli).

Who uses Sequelize?

No maker's live product we track yet; 20 open-source projects declare it in their code. source ↗