mendelson AS2: Edition Comparison

The mendelson AS2 software is available under different licenses. This is a short overview on the features of these versions.


Community Edition

Commercial Edition

Commercial Edition + SMP

Price Free
Number of partnersUnlimitedUnlimitedUnlimited
Number of transactionsUnlimitedUnlimitedUnlimited


Asyncronous and syncronous MDN
Partner management
Digital signatures, encryption
TLS (up to TLS v1.3), TLS client authentication
Data compression (AS2 1.1)
Multiple attachments (AS2 1.2)
SHA-2 (SHA-256, SHA-384, SHA-512)
SHA-3 (SHA3-256, SHA3-384, SHA3-512)
Multilingual support: Localized to de, en and fr
Web interface for transaction monitoring
Multiple identities/local stations (ASP capable)
Key and certificate management
Key and certificate generation
Certificate exchange messages (CEM)
Email event notificationSome
Access via API (java lib API, XML API)
Message statistic
Message quota
User defined HTTP headers
Run AS2 server as service (Windows)


ArchitectureDesktop applicationClient-Server applicationClient-Server application


Community Forums (no professional support)
Detailled documentation
Access to mendelson Support💲
Access to phone Support💲💲
Remote Support💲💲
Free updates

License Type

Open Source License (GPL)
Commercial License

Support & Maintenance Plan (SMP)

Buy our Support & Maintenance Plan (SMP) with our software products, which not only enables you to receive priority technical support, but also provides you with all major software upgrades and minor releases at no additional cost throughout the SMP period.

Services include:

Priority Technical Support - Priority Technical Support provided via e-mail and Web-based support form. Our expert technical support team will respond within 1-2 business days during European business hours (M-F, 8am-5pm CET). German holidays excluded.

Free Minor & Major Releases - You will receive all minor and major software releases that are released during your support period. Updates that you receive cover the specific edition of the product that you have purchased and typically include many additional features.

Maintenance - During the support period you may also report any software problem or error to us using the same support process described above. If we determines that a reported reproducible material error in the software exists and significantly impairs the usability and utility of the software, we agrees to make reasonable efforts to provide a usable work-around solution or to correct the issue in an upcoming service pack or software release (made available at our sole discretion).

More info on SMP

The maintenance plan is only available for the commercial version of the mendelson AS2 software, and can only be purchased as part of a bundle with a current mendelson AS2 software product. If you license more than one product it is required that all have either a SMP or no SMP.

Desktop application vs Client-Server application

The community edition of the mendelson AS2 server has an included graphical user interface and could therefor not be started in a dedicated server environment (mainly linux without an installed X environment).

The commercial edition contains a server installation and a client (graphical user interface) installation with works cross platform. You could for example run the server on your linux server and attach several clients to it from any windows desktop with a single license and user management/login. To fit the productive requirements of your communication the commercial version of the server installation could be started as windows service.