Run JNLP files with the latest Java version

Java Web Start (JWS) was deprecated in Java 9, and starting with Java 11, Oracle removed JWS from their JDK distributions. This means that clients that have the latest version of Java installed can no longer use JWS-based applications. And since public support of Java 8 has ended in Q2/2019, companies no longer get any updates and security fixes for Java Web Start.

This is why we decided to create OpenWebStart, an open source reimplementation of the Java Web Start technology. Our replacement provides the most commonly used features of Java Web Start and the JNLP standard, so that your customers can continue using applications based on Java Web Start and JNLP without any change.
OpenWebStart is used by

OpenWebStart support options

Java and your operating system get updates, and so does OpenWebStart. Thanks to the support of our awesome sponsors, OpenWebStart will be updated and further developed as long as needed.

You can of course use OpenWebStart as an open source solution free of charge but we‘d also like to talk to you about support options to guarantee the lasting development.

Community

free

Community usage - Devs help devs

  • Public bug fixes only


  • Feedback from community users within public forum
  • Support not guaranteed


  • No customization



  • Reaction time not guaranteed

  • No discount for ordering special features

Community

free

Community usage - Devs help devs

  • Public bug fixes only
  • Feedback from community users within public forum
  • Support not guaranteed
  • No customization
  • Reaction time not guaranteed
  • No discount for ordering special features

Developer

1200EUR

Small companies up to 5 developers. Price per developer and year.

  • Hotfixes will be released within 4 weeks

  • Feedback from OWS core developers in dedicated forum area
  • Guaranteed support available

  • No customization



  • Reaction time as per best effort

  • No discount for ordering special features

Developer

1200EUR

Small companies up to 5 developers. Price per developer and year.

  • Hotfixes will be released within 4 weeks
  • Feedback from OWS core developers in dedicated forum area
  • Guaranteed support available
  • No customization
  • Reaction time as per best effort
  • No discount for ordering special features

Basic

6000EUR

Companies with more than 5 developers. Price per company and year.

  • Hotfixes will be released within 2 weeks

  • Feedback from OWS core developers in private forum area
  • Guaranteed support available. Support has higher priority
  • Custom installer for Splash Screen and Update Site available for 2000 EUR / year
  • Reaction time as per best effort but at higher priority than developer
  • 10% discount for ordering special features

Basic

6000EUR

Companies with more than 5 developers. Price per company and year.

  • Hotfixes will be released within 2 weeks
  • Feedback from OWS core developers in private forum area
  • Guaranteed support available. Support has higher priority
  • Custom installer for Splash Screen and Update Site available for 2000 EUR / year
  • Reaction time as per best effort but at higher priority than developer
  • 10% discount for ordering special features

Premium

30000EUR

Companies which need fixed SLA's. Price per company and year.

  • Hotfixes will be released immediately after bug fixing
  • Feedback from OWS core developers in private forum area
  • Guaranteed support available. Support has highest priority
  • Custom installer for Splash Screen and Update Site available included
  • Guaranteed reaction time from 4 hours to one business day
  • 25% discount for ordering special features

Premium

30000EUR

Companies which need fixed SLA's. Price per company and year.

  • Hotfixes will be released immediately after bug fixing
  • Feedback from OWS core developers in private forum area
  • Guaranteed support available. Support has highest priority
  • Custom installer for Splash Screen and Update Site available included
  • Guaranteed reaction time from 4 hours to one business day
  • 25% discount for ordering special features
We are pleased to discuss your individual needs at openwebstart@karakun.com. Please do not post technical questions to this email, use the forum instead.

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