1.火力基地：
Firebase 是 Google 于 2012 年开发的，是一个实时存储和同步数据的数据库。它是一个云托管的实时文档存储，可以灵活地从任何 iOS、Android 设备访问数据。 JavaScript 客户端共享一个实时数据库实例并自动接收最新数据的更新。
2. MongoDB ：
MongoDB 是一个跨平台的面向文档的非关系(NoSQL)数据库程序，不需要数据的行列格式。它提供了高性能并且本质上是动态的，我们不需要像在传统 RDBMS 中那样预定义模式。它是一个开源文档数据库，以键值对的形式存储数据。 MongoDB 由 MongoDB Inc. 开发，最初于 2009 年 2 月 11 日发布。它是用 C++、Go、JavaScript、 Python语言编写的。 MongoDB 提供高速、高可用性和高可扩展性。
Firebase 和 MongoDB 的区别：
| S.NO. | FIREBASE | MONGODB |
|---|---|---|
| 1. | It was developed by Google in 2012. | It was developed by MongoDB Inc. in 2009. |
| 2. | It support Objective C, Java and JavaScript as programming languages. | It supports C, C#, Java, JavaScript, PHP, Lau, Python, R, Ruby as programming languages. |
| 3. | It is a commercial database. | It is an open-source database. |
| 4. | Server operating systems for Firebase are hosted. | Server operating systems for MongoDB are Solaris, Linux, OS X, Windows. |
| 5. | It does not support any replication methods. | The replication method that MongoDB supports is Master-Slave Replication. |
| 6. | It does not support Map Reduce methods. | It supports Map Reduce methods. |
| 7. | It does not support any partitioning method. | It supports Sharding Partitioning method. |
| 8. | Android, iOS, JavaScript API, RESTful HTTP API are used as APIs and other access methods. | Proprietary protocol using JSON are used as APIs and other access methods. |
| 9. | It is more suitable for small-scale applications. | It is more suitable for large-scale applications. |
| 10. | It is not much secure. | It provides more security than Firebase. |