head to head · open source
sequelize vs FreeSql
sequelize has 30,342 GitHub stars, 4,462 forks, 1,080 open issues and last shipped 4 days ago. FreeSql has 4,408 stars, 910 forks, 178 open issues and last shipped 4 days ago. sequelize leads on adoption by 588% (30,342 vs 4,408 stars). sequelize is written in TypeScript under MIT; FreeSql is written in C# under MIT. sequelize has attracted 15% as many forks as stars, FreeSql 21%. FreeSql was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (mysql), 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 | FreeSql | |
|---|---|---|
| GitHub stars | ★ 30K | ★ 4.4K |
| License | MIT | MIT |
| Written in | TypeScript | C# |
| Last push | 2026-11-01 | 2026-11-01 |
| Forks | ⑂ 4.5K | ⑂ 910 |
| 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 FreeSql if
- You want the FreeSql feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and FreeSql 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 FreeSql
🦄 FreeSql, The First AOT ORM! FreeSql is a powerful O/RM component, supports .NET Core 2.1+, .NET Framework 4.0+, Xamarin, And AOT. English 中文 🛠 Support CodeFirst data migration. 💻 Support DbFirst import entity class from database, or use Generation Tool. ⛳ Support advanced type mapping, such as PostgreSQL array type, etc. 🌲 Support expression functions, and customizable analysis. 🏁 Support one to many and many to many navigation properties, include and lazy loading. 📃 Support Read/Write separation, Splitting Table/Database, Global filters, Optimistic and pessimistic locker. 🌳 Support
read the full FreeSql overview →
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Frequently asked questions
Is sequelize or FreeSql more popular?
sequelize has 30,342 GitHub stars and FreeSql has 4,408. sequelize has the larger community by that measure.
Are sequelize and FreeSql free?
Both are open source. sequelize is licensed under MIT and FreeSql under MIT. Neither carries a licence fee.
What is the difference between sequelize and FreeSql?
sequelize is written in TypeScript and FreeSql in C#. 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 FreeSql?
Choose sequelize if you want the larger community (30,342 stars) or its MIT licence terms. Choose FreeSql if its feature set, stack or MIT licence fits better. Both are self-hostable.