- Rainbow Information Systems
 ![[new]](http://eur.i1.yimg.com/eur.yimg.com/i/uk/g/new2.gif) - Provides telecommunication consulting and auditing services including telecom billing analysis, phone bill audits, and overcharge recovery. - Refund Systems
- Provides a full spectrum of telecom audit and consultation services to reduce expenses and maximize profit.
- Teligistics.com
- Unbiased long distance bill auditing and customised low cost telecom packages from multiple long distance carriers.
- ProfiTel Group
- Provides telecom cost management services including contract negotiations, telecom billing audits, and more.
- Profit Enhancement Services
- Specialises in auditing and expense recovery for the telecommunications industry.
- MBG
- Offers telecommunications expense management systems, IT chargebacks, and telecommunications invoice analysis services.
- Advocate Networks
- Provides technical, operational, and financial expertise in all voice, data, video and wireless areas of enterprise communications systems and infrastructure.
- Business Telecommunications Audit Service
- Nationwide contingency fee based telephone invoice auditing and telecom expense management.
- Cerylion
- Provider of Telecom Expense Management system that enables real-time analysis of all wireless networks expenses.
- Valicom
- Provider of telecom expense management (TEM) solutions, offering a comprehensive portfolio of expense and spend management opportunities tailored to the unique needs and situations of each client.
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