H2 — RDBMS (Open Source)

H2 is an open-source RDBMS solution from H2 Group. Compare it against 85 other RDBMS tools on FreeSoftwareX — by features, licensing and price — and request a quote or demo free in 2026.

What is H2?

H2 is open source — its source code is publicly available and free to use, modify and self-host, usually with an active community and no licensing fees. It is categorised under RDBMS and published by H2 Group. Buyers typically evaluate H2 when they need a dependable RDBMS option and want to weigh the trade-offs between free, open-source and paid tools before committing.

H2 alternatives

If H2 isn't the right fit, compare these RDBMS alternatives side by side:

4th Dimension (4D)Actian VectorActian Zen (PSQL)Adabas DAltibaseAmazon AuroraApache DerbyApache IgniteCA DatacomCA IDMSCUBRIDClarionCockroachDBCrateDB

Frequently asked questions

Is H2 free?
Yes. H2 is open source and free to use, with no purchase cost for the core product.
What are the best H2 alternatives?
Popular RDBMS alternatives to H2 include 4th Dimension (4D), Actian Vector, Actian Zen (PSQL), Adabas D. See the full list of RDBMS on FreeSoftwareX.
What type of software is H2?
H2 is an open-source RDBMS tool developed by H2 Group.

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