1.阿里云TSDB：
它是一个分布式时间序列数据库。是一种稳定、可靠、性价比高的在线高性能数据库服务。它提供高效的数据读写能力、高压缩比存储以及时序数据插值和聚合。
2. 亚马逊文档数据库：
它是一个商业许可的数据库，具有以下特性，因为它是一种支持 MongoDB 工作负载的快速、可扩展、高度可用且完全托管的文档数据库服务。它目前在 AWS 的加利福尼亚、俄勒冈、北弗吉尼亚和爱尔兰地区可用。它通过模拟响应来实现 Apache 2.0 开源 MongoDB 3.6 API。阿里云 TSDB 和 Amazon DocumentDB 的区别：
| S.NO. | Alibaba Cloud TSDB | Amazon DocumentDB |
|---|---|---|
| 1. | It was developed by Alibaba. | It was developed by Amazon in 2019. |
| 2. | It is a stable, reliable, and cost-effective online high-performance time series database service. | It is a fast, scalable, highly available, and fully managed MongoDB-compatible database service. |
| 3. | The license of Alibaba Cloud TSDB is commercial. | The license of Amazon DocumentDB is also commercial. |
| 4. | In Alibaba Cloud TSDB there are hosted server operating systems. | In Amazon DocumentDB there are hosted server operating systems. |
| 5. | Its primary database model is Time Series DBMS. | Its Primary database model is Document Store. |
| 6. | It does not support the Server-side scripting. | It also does not support the Server-side scripting. |
| 7. | It does not support the partitioning methods. | It also does not support the partitioning methods. |
| 8. | It does not support SQL query language. | It also does not support SQL query language. |
| 9. | It does not support replication methods. | It supports Multi-availability zones for high availability. |
| 10. | It does not provide the concept of Referential Integrity. Hence, no Foreign Keys. | It also does not provide the concept of Referential Integrity. Hence, no Foreign Keys. But may be implemented via Amazon Elastic MapReduce. |
| 11. | It does not offer any API for user-defined Map/Reduce methods. | It also does not offer any API for user-defined Map/Reduce methods. |
| 12. | It supports ACID properties. | It supports Atomic single-document operations. |
| 13. | Programming language supported is Java. | Programming languages supported are Go, Java, JavaScript, PHP and Python. |