LiteDB is described as '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' and is a relational database in the development category. There are more than 50 alternatives to LiteDB for a variety of platforms, including Linux, Windows, Mac, Self-Hosted and Web-based apps. The best LiteDB alternative is SQLite, which is both free and Open Source. Other great apps like LiteDB are PostgreSQL, MySQL Community Edition, MongoDB and MariaDB.