Welcome to the 3Si Website the home of OM.Net.

If you are looking for a company that can provide you with a fully flexible, highly configurable feature rich CRM and all the services to deliver that solution in your organisation, including project management, implementation consultancy, training and software development all for a fixed price then you are in the right place. 3Si are a privately owned and privately funded company, and we specialise in providing services and solutions to the not-for-profit sector which our company owner directors have successfully been doing so since the launch of the original Open Market product suite in 1993.   Read more

Click here to request a call, demonstration or for more information.


Software developed and supported in the UK
Fully customisable solution
Out of the Box - speedy installation
Fixed budget project - no hidden costs
Guaranteed to fit any customer requirement
Total functionality for a low price
Flexible, configurable, modern look and feel
95% customer retention




Twitter Feed

Today we launched our new website check it out at http://t.co/fjD650C0YS we think it looks fab - wha about a month ago . Reply . Retweet . Favorite
This week we are training our new clients @PensionerOnline ready for them to soon go live with OM. N about a month ago . Reply . Retweet . Favorite
TAF Best Practice Awards Winners - http://t.co/gpS1ieVEiL 3 months ago . Reply . Retweet . Favorite
Congratulations to our clients @NFUtweets who won two awards at the recent TAF Best Practice Awards 3 months ago . Reply . Retweet . Favorite
NetXtra Re-Engineer Site for CABE - http://t.co/NRm3OYloSm 4 months ago . Reply . Retweet . Favorite