With around 150 years combined experience of creating and maintaining Sage solutions our developers have an in depth understanding of the Sage modules and the development process.

We have produced more than twenty modular products since Defacto was established in 1992 and we specialize in providing add-on functionality for Sage ERP X3, Sage ERP 1000, Line 500  in specific areas.

Some of the modules we have written have been adopted by Sage and we continue to work closely with Sage to improve the range and diversity of their Enterprise solutions.

As an accredited Sage Developer we produce fully compatible modular add-ons for the Sage top-end range of products using the same tools, libraries and systems in use at Sage.


Our products are supplied with a maintenance warranty and a support agreement which means they are guaranteed to follow the Sage road map and support forthcoming projects so you can be sure that our modular products will extend into your future plans.

We support the main strategic platforms on which Sage products are offered and we provide service packs to match Sage releases, operating systems and database upgrades as they become available.

Check out the Products section of our web site to see some of our best sellers.

Our developers have experience working with Unix and Windows platforms and wide ranging skills such as C and C# programming, the Windows .NET architecture, HTML 5, Java and ASP Web development, Database design, optimization and management and the Microsoft Office and Back Office products.


Alec Willis, head of development at Defacto, spent five years with the Development Division of Tetra pioneering the early manufacturing modules for Line 500 before leaving to set-up Defacto. He has a rich history of product development working for CAD Centre, Tektronix and Davy Corporation. He also worked in producing Uniplan for ICL, one of the first PC based accounting and manufacturing business systems packages. He is a Microsoft Certified Developer and Systems Engineering.



Latest News

21 May 2018 / Alec Willis
21 May 2018 / Alec Willis
04 October 2016 / Alec Willis

Contact Us

Defacto House
Orix Corner
631 Chesterfield Road
S8 0RX
United Kingdom
+44 (0) 114 255 8599
+44 (0) 114 229 0917