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


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…

Holodeck B2B 4.0 – create a multiprotocol gateway with AS2 support

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The Holodeck B2B stack is growing! Today we’ve released the latest version of our AS4 gateway, as well as a new open source extension you can use to add AS2…

Holodeck B2B 3.0 now available

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In this latest release we take the modular architecture of Holodeck B2B a step further – making it an even more flexible AS4 messaging solution. Further modularisation of Holodeck B2B…

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