Apps similar to PlanetScale include SQLite, which is free and open source. Other options are PostgreSQL, MySQL Community Edition, MongoDB and MariaDB. There's no shortage of Relational Databases like PlanetScale, with more than 50 alternatives for Windows, Linux, Mac, the web and self-hosting.
UnQLite is a in-process software library which implements a self-contained, serverless, zero-configuration, transactional NoSQL database engine. UnQLite is a document store database similar to MongoDB, Redis, CouchDB etc.
Titan is a scalable graph database optimized for storing and querying graphs containing hundreds of billions of vertices and edges distributed across a multi-machine cluster. Titan is a transactional database that can support thousands of concurrent users executing complex graph...
dbHarbor is more than just database management tool. It gives developers and database administrators one place to design, implement and test databases.
H2 is a relational database management system written in Java. It can be embedded in Java applications or run in the client-server mode. The disk footprint (size of the jar file) is about 1 MB.
SQLGate is an integrated database management and development solution that simplifies the construction and operation of databases. A solution that fits different types of databases, SQLGate is customized for seven different databases that make up 83.2% of the DBMS market.
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HSQLDB (Hyper Structured Query Language Database) is a relational database management system written in Java. It has a JDBC driver and supports a large subset of SQL-92 and SQL:2008 standards. It offers a fast, small (around 1300 kilobytes in version 2.
HBase is an open source, non-relational, distributed database modeled after Google's BigTable and is written in Java. It is developed as part of Apache Software Foundation's Apache Hadoop project and runs on top of HDFS (Hadoop Distributed Filesystem), providing...
CUBRID is a comprehensive GPL/BSD open source relational database management system highly optimized for Web Applications. CUBRID is being developed in C/C++. Includes native HA, online hot backup, and other features. JDBC, PHP, ODBC/.NET, Ruby & Python APIs.
LiteDB is an open-source, MongoDB-like database that requires no configuration and is mobile-ready. It's a serverless database delivered in a single DLL under 450kb, fully written in .NET C# managed code and compatible with .NET 4.5 and NETStandard 2.0.
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Vertica is a grid-based, column-oriented database designed to manage large, fast-growing volumes of data and provide very fast query performance when used for data warehouses and other query-intensive applications.
A Postgres Database as a Service platform so you can focus on writing your app, not on becoming a database administrator.
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