Open Rainbow Ltd | 5,673 followers on LinkedIn. IT Procurement, Services and IT Consultancy | Established in 2014 Open Rainbow offers a complete life cycle of IT services: Design, Deploy, Test, Operate, Maintain and Improve. So whether you need us to build you a business case, design a new network or manage and maintain your systems, you can trust us to get the job done. We can start a project together or join at any stage of your IT journey – whatever makes business sense to you.