Realm React Native vs Sequelize: What are the differences?

1. Compatibility with database systems: Realm React Native is a mobile database that is designed to work seamlessly with mobile apps, while Sequelize is an ORM (Object-Relational Mapping) for Node.js that supports various relational databases such as MySQL, PostgreSQL, SQLite, and MSSQL.

2. Data synchronization and offline use: Realm React Native provides robust support for data synchronization and offline use, allowing users to seamlessly work with their data even when the device is not connected to the internet. Conversely, Sequelize does not have built-in support for data synchronization and offline use.

3. Performance and speed: Realm React Native is known for its high performance and fast data retrieval capabilities due to its object-oriented design and optimized storage engine. On the other hand, Sequelize may have performance limitations in terms of speed, especially when dealing with complex queries and large datasets.

4. Data modeling and relationships: In Realm React Native, data modeling and handling relationships between data entities are simplified through its object-oriented approach, making it easier to manage complex data structures. In contrast, Sequelize requires defining explicit relationships and associations between database tables, which can be more complex and time-consuming.

5. User community and support: Realm React Native has a relatively smaller but dedicated user community that provides support and resources for developers, while Sequelize has a larger community due to its popularity in the Node.js ecosystem, offering extensive documentation and resources for assistance.

6. Licensing model: Realm React Native is available under a dual licensing model - a free, open-source version with limited features and a paid version with additional functionalities for enterprise use. In comparison, Sequelize is released under the MIT license, allowing for free usage without any restrictions on commercial use.

In Summary, Realm React Native and Sequelize differ in terms of database compatibility, data synchronization, performance, data modeling, community support, and licensing model.