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. Add support for AS2 with one of our extensions!


  • 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 6.1 – fixes and new Submissions Log

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The latest release of Holodeck B2B is a minor update that fixes some important issues, as well as improving the reliability of message exchanges. Besides these fixes, we’ve also added…

Holodeck SMP – a new open source SMP server

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We have just published the first version of our open source SMP server: Holodeck-SMP. It’s a stand alone SMP server with a modular design and a user friendly UI. With…

Holodeck B2B 6.0 – new API, new configuration options

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We’ve been working on a lot of things this past year and one of them was a big update of Holodeck B2B. This major update introduces a lot of internal…

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