Disposal

Embargoed Release: 07:00hrs Friday 16 December 2005

                                  SOPHEON PLC                                  

          DEFINITIVE AGREEMENT SIGNED FOR SALE OF LESSENGER BUSINESS           

Sopheon plc ('Sopheon'), the international provider of software and services
that improve the financial return from innovation and product development
investments, announces that it has concluded a definitive agreement to sell its
Lessenger business to Mavim B.V. of Noordwijk, The Netherlands. The Lessenger
business provides hospital laboratory management software to approximately 70
customers based in the Netherlands, and accounted for approximately 2% of
Sopheon's 2004 consolidated revenues.

The divestment is consistent with Sopheon's concentration on its flagship
Accolade platform. This includes continued focus on the Dutch healthcare
market, where Accolade is being used to address needs in areas such as
management of hospital protocols, clinical trials and innovation. As announced
previously, Sopheon is actively considering how to apply these solutions to the
US market.

Sopheon's Chairman, Barry Mence said:

'Today's announcementfurtherunderpins our continuing focusand belief in
Accolade. As the year end approaches we areconcentratingalleffortson closing
new Accoladebusinessand delivering on closed orders, while concluding our
planning for 2006 and beyond. Our divestment of Lessenger makes strategic sense
for Sopheon, and also for Lessenger's customers. We believe they will be well
served by Mavim, who are committed to the laboratory market and to continued
investmentin the solution.'

For further information contact:

Barry Mence, Chairman   Sopheon plc                  Tel : + 44 (0) 1483 685735
                                                                               
Arif Karimjee, CFO                                                             
                                                                               
Adam Reynolds           Hansard Communications       Tel : + 44 (0) 207 245 1100                      
Andrew Tan                                           + 44 (0) 7957 203 685     
                                                                               
Floor Van Maaren        Citigate First Financial     Tel : + 31 (0) 205 754 010

About Sopheon

Sopheon (LSE:SPE) is an international provider of software and services.
Sopheon's Accolade® product development system automates gate- or phase-based
product development (PD) processes and provides strategic decision support that
allows companies to improve innovation, cut product development spending waste
and shorten time to market. Sopheon's Monitor software operates as a 'reading
robot' that monitors, filters, analyzes and pushes relevant content to
healthcare and engineering professionals to enable effective compliance with
protocols, standards and regulations. Sopheon is listed on the AIM market of
the London Stock Exchange and on the Euronext in the Netherlands. For more
information, please visit www.sopheon.com.