1. Neo4j：
Neo4j是最著名的图形数据库管理系统，它也是Neo4j，Inc.开发的NoSQL数据库系统。Neo4j与Mysql或MongoDB有所不同，因为它具有的功能使其与其他数据库管理系统相比显得特别。 Neo4j以图表形式存储和显示数据，而不是以表格格式或Jason格式。在这里，整个数据由节点表示，您可以在节点之间创建关系，这意味着整个数据库集合将看起来像一个图形，这使其在其他数据库管理系统中独树一帜。
2. MariaDB：
MariaDB是最受欢迎的开源关系数据库管理系统(RDBMS)之一。它由MySQL的原始开发人员开发，最初于2009年10月29日发布。它具有大量新功能，因此在性能和面向用户方面比MySQL更好。它使用一种标准且流行的查询语言。它运行在不同的操作系统上，并支持多种编程语言。
Neo4j和MariaDB之间的区别：
| S.No. | Neo4j | MariaDB |
|---|---|---|
| 1. | It is developed by Neo4j, Inc. | It is developed by MariaDB Foundation. |
| 2. | It was initially released in 2007. | It was initially released on 29 October 2009. |
| 3. | It is written using Java and Scala language. | It is written in C and C++ Perl and Bash languages. |
| 4. | Server operating systems are Linux, OS X, Solaris, and Windows. | Server operating systems are FreeBSD, Linux, Solaris and Windows. |
| 5. | It supports Causal Clustering using Raft protocol Replication. | It supports both Master-Slave Replication and Master-Master Replication. |
| 6. | APIs and other access methods includes Bolt protocol, Cypher query language, Java API, Neo4j-OGM, RESTful HTTP, API, Spring Data Neo4j, TinkerPop 3. | APIs and other access methods include ADO.NET, JDBC, ODBC, Proprietary native API. |
| 7. | It does not support SQL. | It supports SQL. |
| 8. | Its primary database model is is Graph DBMS. | Its primary database model is is Relational DBMS. |
| 9. | It supports .Net, Clojure, Elixir, Go, Groovy, Haskell, Java, JavaScript, Perl, PHP, Python, Ruby, Scala programming languages. | It supports Ada, C, C#, C++, D, Eiffel, Erlang, Go, Haskell, Java, JavaScript (Node.js), Objective-C, OCaml, Perl, PHP, Python, Ruby, Scheme, Tcl programming languages. |
| 10. | It does not supports Partitioning methods. | It supports Horizontal partitioning, sharding with Spider storage engine or Galera cluster Partitioning methods. |
| 11. | Famous companies like medium.com., Stack, Fiverr, Fundamentei, Trendyol Group, double slash, ingsmen Software, GAPO, etc uses Neo4j. | Famous companies like Accenture, Docplanner, CUNY, Northrop Grumman, etc uses MariaDB. |
| 12. | It provides Causal and Eventual Consistency configurable in Causal Cluster setup and Immediate Consistency in stand-alone mode in a disrtibution system. | It provides us with Immediate Consistency method to ensure consistency in a distributed system. |