node-postgres vs Sequelize
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
A non-blocking PostgreSQL client for Node.js, written in pure JavaScript.
Open source · MIT
A Node.js and TypeScript ORM for working with SQL databases using JavaScript objects.
The short answer
Choose node-postgres if you need…
- Node.js developers who need to query a PostgreSQL database from a server or script
- Teams that want connection pooling built into their database layer
- Projects that use LISTEN/NOTIFY or COPY for notifications or bulk data movement
- Developers who prefer a light layer over a heavy ORM
Choose Sequelize if you need…
- Node.js backend developers who use a relational SQL database
- TypeScript teams that want typed database models
- Projects that may switch between PostgreSQL, MySQL, SQLite or MSSQL
- Developers who want transactions and relations without writing raw SQL for every query
Side-by-side
| node-postgres | Sequelize | |
|---|---|---|
| Type | Library | Library |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 13.2k | 30.3k |
| Setup difficulty | Intermediate | Intermediate |
| How you get it | Install with a package manager | Install with a package manager |
| Main language | JavaScript | TypeScript |
| Last code update | 14 days ago | 5 days ago |
What each one is
node-postgres
node-postgres (npm package "pg") is a client library that lets Node.js programs talk to PostgreSQL databases. It is non-blocking, so database calls do not freeze the rest of the program while they wait. The README says it also works with bun, deno, and cloudflare, and offers optional native libpq bindings alongside the pure JavaScript client.
Sequelize
Sequelize is an object-relational mapper (ORM) for Node.js. It lets developers read and write rows in SQL databases such as PostgreSQL, MySQL, MariaDB, SQLite and Microsoft SQL Server through JavaScript or TypeScript code instead of hand-written SQL. The README describes it as promise-based, with transaction support, relations, eager and lazy loading, and read replication.
Best for
node-postgres
- Node.js developers who need to query a PostgreSQL database from a server or script
- Teams that want connection pooling built into their database layer
- Projects that use LISTEN/NOTIFY or COPY for notifications or bulk data movement
- Developers who prefer a light layer over a heavy ORM
Sequelize
- Node.js backend developers who use a relational SQL database
- TypeScript teams that want typed database models
- Projects that may switch between PostgreSQL, MySQL, SQLite or MSSQL
- Developers who want transactions and relations without writing raw SQL for every query
Strengths
node-postgres
- Widely used, with about 13,000 GitHub stars and a published npm package
- Pure JavaScript client and native libpq bindings share the same API, according to the README
- Covers core PostgreSQL features such as parameterized queries, pooling, and COPY
Sequelize
- Supports many SQL databases, including PostgreSQL with JSON and JSONB support
- Written in TypeScript and published under the permissive MIT license
- Has a long history, a large star count and an active contributor community
Not ideal for
node-postgres
- People who want an ORM or query builder; the README says the library is by design light on abstractions
- Anyone not using JavaScript or Node.js-compatible runtimes
- Non-developers looking for a finished database tool with a visual interface
Sequelize
- Projects that don't use a SQL database, since Sequelize is built for relational databases
- Developers who prefer writing raw SQL and want minimal abstraction
- Teams that need a stable release right now, since the README highlights active work on the next major version and links to a v7 alpha guide
Trade-offs
node-postgres
- The README is truncated here, so detailed API behavior and version compatibility are not verified in this entry
- No formal release is listed, so users must rely on the npm package or repository state
- Light on abstractions means you write and maintain your own SQL
Sequelize
- The README asks for new maintainers and notes that the next major version is still being finalized
- Two major versions are documented (v6 stable, v7 alpha), so users must pick one and follow its guide
- Feature details beyond the README summary are not covered in the text provided
Getting started
node-postgres
Install the pg package from npm
npm install pgSequelize
Install the core package (from the npm badge link)
npm install @sequelize/coreFrequently asked questions
What is the difference between node-postgres and Sequelize?
node-postgres: A non-blocking PostgreSQL client for Node.js, written in pure JavaScript. Sequelize: A Node.js and TypeScript ORM for working with SQL databases using JavaScript objects. node-postgres suits node.js developers who need to query a postgresql database from a server or script, while Sequelize suits node.js backend developers who use a relational sql database.
Are node-postgres and Sequelize free?
node-postgres: Free and open source. Sequelize: Free and open source.
Is node-postgres or Sequelize more popular?
Sequelize has more GitHub stars (30.3k) than node-postgres (13.2k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to node-postgres and Sequelize?
Other options people compare them with include TypeORM, Kysely, knex.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.