Difference Between ToroDB and YugabyteDB

1. ToroDB :
It is a MongoDB-compatible JSON document store, built on top of PostgreSQL and it is a technology designed to fulfill the gap between document oriented and SQL databases. It is an open source NoSQL database that runs on top of a RDBMS which is compatible with MongoDB protocol and APIs. ToroDB is an open source project that reads a NoSQL document, automatically infers its structure, and transforms it into a set of tables and columns that represent the data into a relational form.

2. YugabyteDB :
It is a high-performance, cloud native and open source distributed SQL database globally-distributed document store. YugabyteDB aims to make applications agile. Yugabyte is headquartered in Sunnyvale, CA. It is distributed and developed as an Apache 2.0 open source project .

Difference between YugabyteDB and ToroDB :

S.No.	ToroDB	YugabyteDB
1	Developed by 8Kdata and initially released on 2016.	Developed by Yugabyte Inc. and initially released on 2017. Current release on March 2020.
2	All OS with a Java 7 VM is server, operating systems of ToroDB.	Linux, OS X are server operating systems of YugabyteDB .
3	Primary database model is Document store.	Primary database model is Relational DBMS.
4	Absence of Secondary database models in ToroDB .	Secondary database models is Document store and Wide column store.
5	Absence of any supported programming languages.	C, C#, C++, Go, Java, JavaScript (Node.js), Python, Ruby are supporting programming languages.
6	Absence of APIs and other access methods in ToroDB.	YCQL, an SQL-based flexible-schema API with its roots in Cassandra Query Language, APIs and other access methods.
7	It has schema-free Data Schema.	Data scheme is depending on used data model.
8	Its Implementation language is Java.	Implementation language of YugabyteDB is  C and C++.
9	Absence of Transaction concepts in ToroDB.	Distributed ACID with Serializable & Snapshot Isolation. Inspired by Google Spanner architecture is Transaction concepts.
10	Master-slave replication methods in ToroDB.	Replication methods is based on Raft distributed consensus protocol, minimum 3 replicas for continuous availability.
11	It has Eventual Consistency and Immediate Consistency concept.	Strong consistency on writes and tunable consistency on reads is consistency concept in YugabyteDB.
12	It has no concept of Foreign keys.	But it has concepts of Foreign keys.