Software Alternatives, Accelerators & Startups

Sequelize VS RxDB

Compare Sequelize VS RxDB and see what are their differences

Sequelize logo Sequelize

Provides access to a MySQL database by mapping database entries to objects and vice-versa.

RxDB logo RxDB

A fast, offline-first, reactive Database for JavaScript Applications
  • Sequelize Landing page
    Landing page //
    2022-10-28
  • RxDB Landing page
    Landing page //
    2023-07-20

RxDB, which stands for Reactive Database, is a JavaScript-based NoSQL database designed for a wide range of applications such as websites, hybrid apps, Electron apps, progressive web apps, and Node.js. The "reactive" aspect of RxDB allows you not only to retrieve the current state of the database but also to subscribe to all changes in the state, including query results or specific fields within a document. This feature is particularly advantageous for real-time user interface applications, as it facilitates development and offers notable performance benefits. Additionally, RxDB can be utilized to build efficient backends in Node.js.

RxDB

Website
rxdb.info
$ Details
freemium €400.0 / Annually
Release Date
2016 December

Sequelize features and specs

  • ORM Abstraction
    Sequelize provides a robust Object-Relational Mapping (ORM) layer, allowing developers to interact with the database using JavaScript objects instead of raw SQL queries. This abstraction simplifies database operations and improves code readability.
  • Cross-database compatibility
    Sequelize supports multiple SQL dialects including PostgreSQL, MySQL, MariaDB, SQLite, and Microsoft SQL Server. This flexibility makes it easier to switch between different database systems without major changes to the application code.
  • Query Builder
    Sequelize offers a powerful query builder that allows complex queries to be written in a more intuitive and maintainable way compared to raw SQL. This includes support for nested queries, eager loading, and more.
  • Active Community and Ecosystem
    Sequelize has a large and active community, providing a wealth of tutorials, plugins, and ongoing support. This makes it easier to find solutions to common problems and to extend the functionality of Sequelize.
  • Migrations and Seeder Support
    Sequelize provides built-in tools for creating database migrations and seeders, making it easier to manage and version the database schema over time.
  • Validation and Constraints
    Sequelize offers built-in validation and constraint features that allow developers to define rules and conditions that data must meet before being inserted or updated in the database. This helps maintain data integrity and consistency.

Possible disadvantages of Sequelize

  • Learning Curve
    While Sequelize simplifies many database operations, it has a steep learning curve for beginners. Understanding all the features and properly implementing them can take time and effort.
  • Performance Overhead
    The abstraction layer that Sequelize provides can sometimes introduce performance overhead compared to raw SQL queries. For highly performance-sensitive applications, this might be a concern.
  • Complexity in Complex Queries
    Although Sequelize's query builder is powerful, creating very complex queries can become cumbersome and may require significant effort to optimize. Sometimes raw SQL might be more straightforward for these cases.
  • Limited NoSQL Support
    Sequelize is designed primarily for SQL databases, and its support for NoSQL databases is limited. If your application requires interaction with NoSQL databases, you may need to look for other ORM solutions.
  • Documentation Gaps
    While the official documentation is comprehensive, there can be gaps or lack of clarity in some areas, especially for advanced features. Users may need to rely on community support and external tutorials to fill in these gaps.
  • Handling Large Data Models
    For applications with very large and complex data models, maintaining Sequelize models and associations can become challenging and error-prone. This might necessitate additional tooling or practices to manage effectively.

RxDB features and specs

  • Offline-First Architecture
    RxDB is designed with an offline-first approach, allowing applications to function seamlessly without a constant internet connection by utilizing local storage and synchronizing with the server when online.
  • Reactive Data Stores
    The library offers real-time data synchronization and reactive data stores, enabling automatic updates to the UI when the underlying database changes.
  • Cross-Platform Compatibility
    RxDB works across various platforms, including web browsers, Node.js, and mobile devices, providing flexibility for developers in building cross-platform applications.
  • Flexible Schema Management
    RxDB supports JSON Schema for defining data models, allowing developers to enforce data consistency and validation effectively.
  • Replication and Sync
    Comes with built-in replication features that ensure easy data synchronization between client and server databases, helping maintain data consistency across different devices and users.

Analysis of Sequelize

Overall verdict

  • Sequelize is generally considered a good choice for Node.js developers who need an ORM to simplify interactions with SQL databases. It is particularly valued for its robust feature set and the active community that keeps it updated and improves its functionality. However, for those who prefer working directly with SQL or working in environments where raw performance is a significant concern, alternatives might be more suitable.

Why this product is good

  • Sequelize is a popular ORM for Node.js that provides developers with the ability to interact with various SQL databases using JavaScript objects, making database management easier and more intuitive. Its support for multiple dialects like PostgreSQL, MySQL, MariaDB, SQLite, and Microsoft SQL Server makes it versatile. Additionally, Sequelize offers features such as transaction handling, relations, eager and lazy loading, read replication, and more, which contribute to both its flexibility and its power.

Recommended for

  • Developers looking for an ORM with extensive database dialect support
  • JavaScript developers who prefer working with higher abstraction over raw SQL queries
  • Projects that can benefit from Sequelize's powerful query capabilities and model definitions
  • Teams that appreciate a consistent structure and design pattern across their database interactions

Sequelize videos

Sequelize Review

More videos:

  • Review - sequelize review
  • Review - Should you use Sequelize, TypeORM, or Prisma?

RxDB videos

No RxDB videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to Sequelize and RxDB)
Web Frameworks
100 100%
0% 0
NoSQL Databases
0 0%
100% 100
Development
100 100%
0% 0
Databases
34 34%
66% 66

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Sequelize and RxDB

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RxDB Reviews

10 Best Open Source Firebase Alternatives
Reactive Database or RxDB is a real-time NoSQL database for JavaScript apps such as progressive web apps, electron apps, PWAs, hybrid apps, and websites. Reactive means that you get to query the current state while subscribing to all state changes like the result of a single field of a document or query.

Social recommendations and mentions

Based on our record, Sequelize should be more popular than RxDB. It has been mentiond 49 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Sequelize mentions (49)

  • How To Secure APIs from SQL Injection Vulnerabilities
    Object-Relational Mapping frameworks like Hibernate (Java), SQLAlchemy (Python), and Sequelize (Node.js) typically use parameterized queries by default and abstract direct SQL interaction. These frameworks help eliminate common developer errors that might otherwise introduce vulnerabilities. - Source: dev.to / 3 months ago
  • Generate an OpenAPI From Your Database
    I was surprised to find that there was no standalone tool that generated an OpenAPI spec directly from a database schema - so I decided to create one. DB2OpenAPI is an Open Source CLI that converts your SQL database into an OpenAPI document, with CRUD routes, descriptions, and JSON schema responses that match your tables' columns. It's built using the Sequelize ORM, which supports:. - Source: dev.to / 5 months ago
  • Secure Coding - Prevention Over Correction.
    For example, in 2019, it was found that the popular Javascript ORM Sequelize was vulnerable to SQL injection attacks. - Source: dev.to / 10 months ago
  • Good Practices Using Node.js + Sequelize with TypeScript
    Integrating Node.js, Sequelize, and TypeScript allows you to build scalable and maintainable backend applications. By following these best practices, such as setting up your project correctly, defining models with type safety, creating typed Express routes, and implementing proper error handling, you can enhance your development workflow and produce higher-quality code. Remember to keep your dependencies... - Source: dev.to / 11 months ago
  • Security Best Practices for Your Node.js Application
    If your application doesn't necessitate raw SQL/NoSQL, opt for Object-Relational Mappers (ORMs) like Sequelize or Object-Document Mappers (ODMs) like Mongoose for database queries. They feature built-in protection against injection attacks, such as parameterized queries, automatic escaping, and schema validation, and adhere to some security best practices. - Source: dev.to / 11 months ago
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RxDB mentions (13)

  • Stop Syncing Everything
    > I'm thinking to give it a try in one of my React Native apps that face very uncertain connectivity. Some similar stuff you may want to investigate (no real opinion, just sharing since I've investigated this space a bit): - https://rxdb.info. - Source: Hacker News / 2 months ago
  • Show HN: Triplit – Open-source syncing database that runs on server and client
    Looks like it could be a more batteries-included/opinionated alternative to RxDB (https://rxdb.info). The relational queries might help some people who tend to think in SQL as opposed to documents (as in CouchDB or MongoDB) and the WebSockets for synchronization will help people get started more quickly. (RxDB provides interfaces for those who want to implement their own storage engine and/or synchronization... - Source: Hacker News / 12 months ago
  • HackNote
    Some years ago "offline-first" was a thing: https://web.archive.org/web/20170720174332/http://hood.ie/initiatives/#offline-first Primarily based on PouchDB/CouchDB. Now the site redirects to RxDB. https://rxdb.info/ There's still a site by that name but I don't quite understand what's the intention https://offlinefirst.org/. - Source: Hacker News / about 1 year ago
  • Ask HN: How Can I Make My Front End React to Database Changes in Real-Time?
    I'm interested in this problem also! I think there is a large overlap with projects that market/focus on offline-first experiences. AFAIK this problem can be solved by: 1) Considering a client-side copy of the database that gets synced with the remote DB. This is an approach [PowerSync](https://www.powersync.com/) and [ElectricSql](https://electric-sql.com/) and [rxdb](https://rxdb.info/) take! - Source: Hacker News / about 1 year ago
  • You can't leak users' data if you don't hold it
    Hey, after I posted that, I went and gave a second look online to see if I could find something that would allow me to develop a local-first app with offline persistence and syncing capabilities. I ended up finding some possibilities out there that could potentially help me build stuff. One of them is RxDB [1], which offers WebRTC syncing - you'd still need a signaling server, I suppose, but all sensitive... - Source: Hacker News / about 1 year ago
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What are some alternatives?

When comparing Sequelize and RxDB, you can also consider the following products

Hibernate - Hibernate an open source Java persistence framework project.

Firebase - Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.

Entity Framework - See Comparison of Entity Framework vs NHibernate.

PouchDB - Open-source JavaScript database inspired by Apache CouchDB that's designed to run well within the browser

SQLAlchemy - SQLAlchemy is the Python SQL toolkit and Object Relational Mapper that gives application developers the full power and flexibility of SQL.

Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.