1. 亚马逊云搜索：
它是一种可扩展的基于云的搜索服务，是 Amazon Web Services 的一部分。它是亚马逊托管的搜索引擎服务，数据存储在亚马逊云中。该数据库支持 34 种语言，其特点是突出显示、自动完成和地理空间搜索。
2. 亚马逊简单数据库：
它是亚马逊托管的简单数据库服务，数据存储在亚马逊云中。 Amazon 是一项网络服务，用于实时对结构化数据运行查询。这个数据库是由 Amazon.com 用 Erlang 编写的。它具有以下特点——高可用性和灵活性，很少或没有管理负担。
Amazon CloudSearch 和 Amazon SimpleDB 之间的区别：
| S.NO. | Amazon CloudSearch | Amazon SimpleDB |
|---|---|---|
| 1. | Developed By Amazon in 2012. | Developed By Amazon in 2007. |
| 2. | It is a hosted search engine service by Amazon with data stored in Amazon cloud. | It is a hosted simple database service by Amazon, with data stored in Amazon Cloud. |
| 3. | It supports replication methods that are managed transparently by AWS. | It supports replication methods. |
| 4. | It supports partitioning methods. | It does not support partitioning methods. |
| 5. | Its Primary database model is a Search engine. | Its primary database model is the Key-value store. |
| 6. | It supports predefined data types such as float or date. | It does not support predefined data types such as float or date. |
| 7. | No Methods to ensure consistency in a distributed system. | Eventual Consistency and Immediate Consistency is used to ensure consistency in a distributed system. |
| 8. | Replication methods are managed transparently by AWS support. | The replication method is not managed by any support. |
| 9. | It supports Data scheme. | It supports schema-free Data scheme. |