Interconnect Billing Systems
- Offers scalable interconnect billing and settlement solutions for fixed, wireless and Internet operators in Europe.
- http://www.iconxsolutions.com/

Platypus
- ISP billing and provisioning system that runs on Windows.
- http://www.boardtown.com/

Telecetera Plc.
- Providing billing systems for cellular service providers and Internet service providers.
- http://www.telecetera.co.uk/

Rodopi
- Web-based software package for ISPs offering billing and customer provisioning. Runs on MS SQL Server.
- http://www.rodopi.com/

Inovaware
- Internet billing and customer care software for IP-based services.
- http://www.inovaware.com/

IEA Software
- Offers billing and customer management software for ISPs. Features downloads, online purchasing and contact details.
- http://www.iea-software.com/

IntraISP
- Offers a web-based billing, provisioning, contact management and customer care software suite for Internet, hosting and telecom service providers.
- http://www.intraisp.com/

BillMax
- Offers billing, customer care and account management software for ISPs. Features demos, specifications and documentation.
- http://www.billmax.com/

Sphera
- Enterprise-level automation, billing and reseller system for access providers and web hosting companies.
- http://www.sphera.com/

Optigold ISP Billing Software
- Accounting software for ISPs, web hosting, ASPs, wireless and broadband providers.
- http://www.digitalpoint.com/products/isp/

NetUp Systems
- Developers of the UTM billing system that runs on Red Hat Linux.
- http://www.netup.biz/

Netcents
- Manufacturer of free ISP billing and provisioning software for Windows.
- http://www.netcents.com/

ModernGigabyte
- Manufacturer of the ModernBill billing software for ISPs and web hosting companies.
- http://www.moderngigabyte.com/

HostFlow
- Business management software for hosting companies or web agencies.
- http://www.hostflow.com/

Freeside
- Open-source billing software and outsourced billing services for ISPs.
- http://www.sisd.com/freeside/

Buddy Systems, Inc.
- Offers web hosting billing software and domain management software.
- http://www.webhostingeasy.com/

Advanced Communications
- Manufacturer of billing and Radius software for ISPs.
- http://www.advcomm.net/

Alepo
- Developers of billing, prepaid and payment solutions for ISPs.
- http://www.alepo.com/