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, Membership, Events and Sales Management application suite 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

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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



Association Language LearningBritish Printing Industries FederationEngineering Construction Industry AssociationInstitute of Healthcare Engineering and Estate ManagementBritish MensaNational Farmers Union ScotlandProvincial Booksellers Fairs Association

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Renewals causing you stress? not after tomorrow, its Free Training Friday so join in & future re a day ago . Reply . Retweet . Favorite
RT @seniorinternet: Really productive workshop with @britpestcontrol & @3SiCRM - exciting times a day ago . Reply . Retweet . Favorite
RT @3SiCRM: Have you seen our latest Christmas Newsletter? if not check it out here https://t.co/R5t 4 days ago . Reply . Retweet . Favorite
Have you seen our latest Christmas Newsletter? if not check it out here https://t.co/R5te6Q2BJ6 http 7 days ago . Reply . Retweet . Favorite
Another great Free Training webinar session to our customers this morning on DD processing #freetrai about a month ago . Reply . Retweet . Favorite