head to head · open source
sequelize vs kysely
sequelize has 30,343 GitHub stars, 4,486 forks, 1,080 open issues and last shipped 2 days ago. kysely has 14,327 stars, 456 forks, 173 open issues and last shipped yesterday. sequelize leads on adoption by 112% (30,343 vs 14,327 stars). sequelize is written in TypeScript under MIT; kysely is written in TypeScript under MIT. sequelize has attracted 15% as many forks as stars, kysely 3%. kysely was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 5 topic tags (microsoft-sql-server, mssql, mysql, nodejs), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| sequelize | kysely | |
|---|---|---|
| GitHub stars | ★ 30K | ★ 14K |
| License | MIT | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-01 | 2026-11-02 |
| Forks | ⑂ 4.5K | ⑂ 456 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick sequelize if
- You weight community size — 30K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick kysely if
- You want the kysely feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and kysely fits your workflow better
About sequelize
Sequelize Sequelize is an easy to use and promise based Node.js ORM tool for Postgres, MySQL, MariaDB, SQLite, DB2, Microsoft SQL Server, Snowflake, Oracle DB and Db2 for IBM i. It features solid transaction support, relations, eager and lazy loading, read replication and more. Would you like to contribute? Read our contribution guidelines to know more. There are many ways to help! 😃 🚀 Seeking New Maintainers for Sequelize! 🚀 We're looking for new maintainers to help finalize and release the next major version of Sequelize! If you're passionate about open source and database ORMs, we'd love to have you…
read the full sequelize overview →
About kysely
Join the discussion ⠀⠀⠀⠀⠀⠀⠀ Get started & more! Kysely Kysely (pronounce “Key Seh Lee”) is a type safe and autocompletion friendly TypeScript SQL query builder. Inspired by Knex.js. Mainly developed for Node.js but also runs on all other JavaScript environments like Deno, Bun, Cloudflare Workers and web browsers. Kysely makes sure you only refer to tables and columns that are visible to the part of the query you're writing. The result type only has the selected columns with correct types and aliases. As an added bonus you get autocompletion for all that stuff. As shown in the gif above, through the pure magic of…
read the full kysely overview →
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Frequently asked questions
Is sequelize or kysely more popular?
sequelize has 30,343 GitHub stars and kysely has 14,327. sequelize has the larger community by that measure.
Are sequelize and kysely free?
Both are open source. sequelize is licensed under MIT and kysely under MIT. Neither carries a licence fee.
What is the difference between sequelize and kysely?
sequelize is written in TypeScript and kysely in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, sequelize or kysely?
Choose sequelize if you want the larger community (30,343 stars) or its MIT licence terms. Choose kysely if its feature set, stack or MIT licence fits better. Both are self-hostable.