H2 Database Engine

H2 Database Engine is ranked #34 of 74 in database software on Freedom251, made by H2 Database Engine. It runs on API, Linux, macOS, Self-hosted, Web, Windows. There is a free plan.

H2 Database Engine plans and pricing

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H2 Database Engine Free Free to use for everybody · source code included h2database.com · 2 Oct 2026

Compared on database software

Free plan: Yes

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H2 Database Engine

Purpose: H2 is a free SQL database written in Java.
Database modes: It supports embedded, server, and mixed modes, with disk based or in memory databases.
SQL and APIs: H2 supports standard SQL and JDBC, and server mode supports JDBC or ODBC over TCP/IP.
Web console: H2 includes a browser based Console application with autocomplete.
Transactions: The feature list includes transaction support, multi version concurrency, and row level locking.
Compatibility: Compatibility modes are listed for IBM DB2, Apache Derby, HSQLDB, MS SQL Server, MySQL, Oracle, and PostgreSQL.
Security: The security page warns that H2 is not designed for adversarial environments and advises against exposing an H2 server to untrusted connections.
Encryption: The feature list says database files can be encrypted with AES-128 and remote JDBC connections can use TLS.
License: H2 is dual licensed under MPL 2.0 or EPL 1.0, and the license page says it can be integrated into and distributed with commercial applications.
Downloads: The home page lists a Windows installer and an all platforms ZIP download.
Support: The home page directs users to Stack Overflow and a Google Group for support.
Footprint: The home page describes a small footprint of around 2.5 MB for the JAR file.
Founded: 2004
Price from: Free

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Where it ranks on Freedom251

Best Database Software in 2026#34 of 74
Best Relational Databases in 2026#4 of 30
Best Embedded Databases in 2026#10 of 30

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Sources

h2database.com/html/main.html· checked 2 Oct 2026
h2database.com/html/features.html· checked 2 Oct 2026
h2database.com/html/security.html· checked 2 Oct 2026
h2database.com/html/license.html· checked 2 Oct 2026
h2database.com· checked 23 Sept 2026