History of Defacto

Defacto Solutions Limited was founded in August 1991 by three ex-Tetra employees Alec Willis, Tom O’Brien and Gary Cassinelli. The aim of the business was to work closely with Tetra to provide consulting and bespoke programming services and resources to aid the Tetra Resellers.  

As well as providing a valuable customization service, the company developed a number of add-on modules including the original Configure-to-Order module in association with Apex Systems.

The module was successful and was subsequently acquired by Tetra.


The business grew and when Sage bought Tetra in 1997, Defacto became a Sage Complementary Developer and ISV and continued to produce solutions for the Sage product line, harnessing the potential of emerging technologies while designing and creating robust and useable solutions.

In 2004 the close ties with Sage were further cemented when Sage, seeing the potential in the Defacto products, moved to acquire the Product Management, Production Backflush and Manufacturing extensions modules.

Today Defacto operates from its own offices in Sheffield with staff demonstrating combined Sage experience of 150 years. The company remains privately owned by one of the founding members, is self-financing and has no loans or debts to service.

With over 25 modular add-ons, 2,000 customizations and more than 500 customers Defacto looks forward to celebrate its 25 Year Anniversary in 2016.

Company Updates

Have you tried our helpdesk yet? It all starts with just one click, we're never far away and do all we can to assist you > https://goo.gl/tPNtHr

Our Universal Import module provides a gateway tool for integrating Sage 1000 and Sage Line 500 with Point of Sale, Web Sales Portals, Configuration Front-Ends, CRM Products, Third-Party Manufacturing systems and Carousel and Warehouse Management systems >

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 > https://goo.gl/JrXz6R

We have produced around twenty modular products during the last fourteen years and we specialise in providing add-on functionality for Sage X3, Sage 1000 and Sage Line 500 > https://goo.gl/tEfUwG

We provide technical advice on product use and we will help you try to resolve operating difficulties. Our team of application and systems specialists is trained in the complete Defacto portfolio : https://goo.gl/LKgsDb


Latest News

03 October 2016 / Alec Willis
03 October 2016 / Alec Willis
09 April 2015 / 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