1.托罗数据库：
它是一个兼容 MongoDB 的 JSON 文档存储，建立在 PostgreSQL 之上，它是一种旨在填补面向文档和 SQL 数据库之间差距的技术。它是一个开源 NoSQL 数据库，运行在与 MongoDB 协议和 API 兼容的 RDBMS 之上。 ToroDB 是一个开源项目，它读取 NoSQL 文档，自动推断其结构，并将其转换为一组表和列，这些表和列将数据表示为关系形式。
2.燕扎：
它是用于物联网 (IoT) 应用程序的时间序列 DBMS，由 Yanza 开发。其服务器操作系统为Window，支持HTTP API，使应用程序敏捷。其总部位于加利福尼亚州桑尼维尔。作为 Apache 2.0 开源项目开发和分发。
ToroDB 和 Yanza 的区别：
| S.No | ToroDB | Yanza |
|---|---|---|
| 1. | It was developed by 8Kdata and initially released on 2016. | It was developed by Yanza and initially released on 2015. |
| 2. | All OS with a Java 7 VM is server, operating systems of ToroDB. | Windows is server operating systems of Yanza. |
| 3. | Primary database model is Document store. | Primary database model is Time Series DBMS. |
| 4. | Absence of supported programming language. | It supports any language that supports HTTP calls. |
| 5. | Absence of APIs and other access methods in ToroDB. | YCQL, an SQL-based flexible-schema API with its roots in Cassandra Query Language are the APIs and other access methods. |
| 6. | It has schema-free Data Schema. | Data scheme of Yanza is schema-free. |
| 7. | Its Implementation language is Java. | It doesn’t has any Implementation language. |
| 8. | Absence of Transaction concepts in ToroDB. | Its doesn’t holds transaction concepts. |
| 9. | Master-slave replication method present in ToroDB. | Absence of Replication methods. |
| 10. | Has Eventual Consistency and Immediate Consistency concept. | It has Immediate Consistency concept. |