HSQLDB - 100% Java Database
For years, HSQLDB has been Java developers' best choice for development, testing and deployment of database applications.
We have maintained our leading position through
continuous enhancements. A major development effort in
the last 7 years has resulted in version 2.4.0, the most
advanced open source RDBMS for small and medium sized
HSQLDB SupportWare allows individual developers, corporations and organizations to support the maintenance and development of HSQLDB.
Participation in the program is by annual subscription.
Developer subscription - $100 or €80
This is for individual developers who
want to support the HyperSQL project. In return, your
questions will get priority and you will get a say in
This is for corporations with limited
internal use or less than 50 distributed units of
HyperSQL. Your developers will get the same benefits
as individual developers.
This is for corporation with extensive use or distribution of HyperSQL. You can ask for enhancements and they will be implemented to the extent your financial contribution allows. Full deployment support is also provided. The suggested amounts for Premier Corporate subscription are the minimum recommended amounts. If you consider that your use of HSQLDB warrants a larger contribution, please use your discretion.
Feature Sponsorship allows an organization to sponsor specific new features or improvements. If your organization would benefit from the addition of a new feature or capability to HSQLDB, you can fund its development after discussion and agreement with Fred Toussi, the Project Maintainer. Please send an email to fredt (at) users.sourceforge.net
Project Sponsorship We also welcome corporate project sponsors to support the general development of the software. Project sponsors will be featured on our home page and can include their news and announcements.
See also the separate section at the end of this page on Project Sponsorship.
It is in the interest of every developer and deployer that HSQLDB is actively maintained and improved. We have avoided licensing restrictions on the use and distribution of HSQLDB and would like to keep it this way.
The proceeds from subscriptions will fund development and support. The support element will be provided to subscribers only.
We will continue to provide free, voluntary support to Open Source project developers only. We may also answer simple questions from new, unsubscribed users if we have spare time.
How to join
Please subscribe to HSQLDB SupportWare now. We need many subscriptions and sponsorships to cover the current full-scale release cycle.
You can pay your annual subscription in either the US Dollar amount or the Euro amount, whichever is more convenient. There are two methods of payment:
Subscriptions are collected and allocated by the HSQLDB Project Maintainer, Fred Toussi. Your name and information is considered strictly confidential. If you wish, you can opt to include your name (developer or organization) in a list on this page, otherwise no reference to your name will be made.
How is the Project funded
SupportWare, sales of licenses for the HyperXtremeSQL product and professional support services, have all contributed to the development effort. Full time development of HSQLDB has been very effective, with extensive new features added in version 2.0 and latest point releases. SupportWare is an essential component in continuing development.