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Holodeck B2B

holodeck-b2b.org

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Spec score 7.7 #14 of 33 in Electronic Invoicing Software

What it is

Holodeck B2B is open-source software for business-to-business messaging, implementing the OASIS ebXML Messaging 3 and AS4 specifications. It can run as a standalone AS4 gateway or connect with a business system through provided interfaces. The software supports one-way and two-way exchanges using push and pull patterns, including files and attachments up to 2 GB. Gateway monitoring is available through command-line and graphical interfaces. A file-based backend is included; REST API integration is an extension, and the API can be used to build custom backends such as Web Services and JMS. An open-source AS2 extension lets a gateway exchange both AS2 and AS4 messages, with protocol selection in the P-Mode. Listed security features include signing and encryption with WS-Security 1.1.1, certificate trust stores, OCSP checks and AS4 non-repudiation of receipt. Version 7.0 is released under GNU GPL 3, and the software runs on Linux, macOS and Windows. The binary package does not include Java and requires JRE 11 or later.

Spec sheet

Purpose
Holodeck B2B is open-source software for B2B messaging that implements the OASIS ebXML Messaging 3 and AS4 specifications.Read 4 Oct 2026 · holodeck-b2b.org
Deployment
It can run as a standalone AS4 gateway or integrate with a business system through provided interfaces.Read 4 Oct 2026 · holodeck-b2b.org
Integrations
File-based backend integration is included; REST API integration is available as an extension, and custom backends such as Web Services and JMS can be built using the API.Read 4 Oct 2026 · holodeck-b2b.org
Security
The feature page lists message signing and encryption using WS-Security 1.1.1, certificate trust stores, OCSP checks, and AS4 non-repudiation of receipt.Read 4 Oct 2026 · holodeck-b2b.org
Compliance
The maker says Holodeck B2B is AS4 compliant and lists e-SENS/CEF eDelivery, ENTSOG/ENTSOE, EESSI, and Superstream profile compliance.Read 4 Oct 2026 · holodeck-b2b.org
Support
The maker offers a support contract providing help directly from the developers.Read 4 Oct 2026 · holodeck-b2b.org
License
Version 7.0 is released under GNU GPL 3; the maker says LGPL3-licensed interfaces are included for connecting to closed-source systems through those interfaces.Read 4 Oct 2026 · holodeck-b2b.org
AS2 extension
An open-source AS2 extension enables one gateway to send and receive both AS2 and AS4 messages, with the protocol selected in the P-Mode.Read 4 Oct 2026 · holodeck-b2b.org
Intended use
The maker describes the product as well suited to serve as the AS4 messaging component in an eDelivery solution.Read 4 Oct 2026 · holodeck-b2b.org
Message exchange
It supports one-way and two-way message exchange using push and pull patterns.Read 4 Oct 2026 · holodeck-b2b.org
Message size
It supports files and attachments up to 2 GB.Read 4 Oct 2026 · holodeck-b2b.org
Monitoring
Command-line and graphical interfaces are available for gateway monitoring.Read 4 Oct 2026 · holodeck-b2b.org
Runtime requirement
The binary package does not include a Java runtime and requires JRE version 11 or later.Read 4 Oct 2026 · holodeck-b2b.org

Plans and prices

Holodeck B2B Free Open-source software under GNU GPL 3 · Java runtime 11 or later required Read 4 Oct 2026 · holodeck-b2b.org

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Strong points and limits

Strong points

  • Supports one-way and two-way push or pull exchanges
  • Handles files and attachments up to 2 GB
  • Provides command-line and graphical monitoring
  • AS2 extension supports AS2 and AS4 exchanges

Limits

  • Binary package requires separate JRE 11 or later
  • REST API integration is available as an extension

Who it suits

It suits organizations building B2B messaging or eDelivery solutions that need an AS4 gateway and configurable integrations. Teams should be prepared to provide JRE 11 or later and can opt for developer support under a support contract.

Verdict

Holodeck B2B specifies its messaging patterns, integrations, security features and platform availability. Its GPL 3 release is free, while the separate Java runtime requirement and extension-based REST integration are practical considerations.

Where Specifiction places it

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