Open source AS4 messaging

Holodeck B2B is open-source software for B2B messaging, implementing the OASIS specifications for ebXML Messaging version 3 and the AS4 profile.

It is very well suited to be used as AS4 messaging component in an eDelivery solution.

Holodeck B2B

Holodeck B2B is the open source AS4 message service handler. It’s feature-rich, fast and reliable. Holodeck B2B is e-SENS/CEF eDelivery and ENTSOG compliant and fully ebMS3 / AS4 protocol compliant.


  • fully compliant with the AS4 standard
  • Java based
  • small & light weight
  • well documented
  • flexible
  • stand-alone
  • easy to connect with
  • runs on most platforms
  • more features


Holodeck B2B 5.0 – new UI’s and Certificate manager

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Holodeck B2B 5.0 is out and these are the changes we’d like to highlight. User interfaces Although Holodeck B2B is back end software that no end user should ever be…

Holodeck B2B 4.1: Selective pulling

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The latest release of Holodeck B2B sees the the addition of support for sending a selective pull request. We’ve also added enhancements in the message processing event mechanism and improvements in the P-Mode…

Meet us at FOSDEM 2019

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Just a few more weeks until FOSDEM 2019, the big open source software conference in Brussels! For any developer who contributes to or uses open source software this is a…

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