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Sequelize vs SQLAlchemy: What are the differences?

Developers describe Sequelize as "Easy-to-use multi sql dialect ORM for Node.js & io.js". Sequelize is a promise-based ORM for Node.js and io.js. It supports the dialects PostgreSQL, MySQL, MariaDB, SQLite and MSSQL and features solid transaction support, relations, read replication and more. On the other hand, SQLAlchemy is detailed as "The Python SQL Toolkit and Object Relational Mapper". SQLAlchemy is the Python SQL toolkit and Object Relational Mapper that gives application developers the full power and flexibility of SQL.

Sequelize and SQLAlchemy belong to "Object Relational Mapper (ORM)" category of the tech stack.

Sequelize and SQLAlchemy are both open source tools. It seems that Sequelize with 19.2K GitHub stars and 3.01K forks on GitHub has more adoption than SQLAlchemy with 3.34K GitHub stars and 888 GitHub forks.

According to the StackShare community, Sequelize has a broader approval, being mentioned in 38 company stacks & 33 developers stacks; compared to SQLAlchemy, which is listed in 34 company stacks and 29 developer stacks.

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Pros of Sequelize
Pros of SQLAlchemy
  • 37
    Good ORM for node.js
  • 26
    Easy setup
  • 17
    Support MySQL & MariaDB, PostgreSQL, MSSQL, Sqlite
  • 13
    Open source
  • 12
  • 11
    Promise Based
  • 4
    Recommend for mongoose users
  • 3
    Atrocious documentation, buggy, issues closed by bots
  • 2
  • 5
    Open Source

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Cons of Sequelize
Cons of SQLAlchemy
  • 28
    Docs are awful
  • 8
    Relations can be confusing
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