| Account&See Invoicing | | A solution which creates invoices, accounts receivables, and credit notes. Handles all sales ledger accounting requirements. Based in the United Kingdom. |
| Accountis | | Offers an online invoicing service that integrates with accounting software to allow clients to send out branded invoices. |
| Am-Beo | | Offers real-time rating and revenue settlement solutions for the telecom and service industries. |
| Anite Calculus | | Offers inter-company billing and retail solutions for competitive OLOs and resellers. Includes support forum and contact details. |
| Aris Software, Inc. | | Suite of customer care, billing, POS, and financial software for the wireless telecommunications industry. |
| Asplen Management | | Offers open source billing, payment collection and customer management solutions for Internet related businesses and service industries. |
| Avolent | | Offers software for managing invoices, payments and relationships. Includes partners, downloads, and benefits. |
| B4E | | B-oo-levard is a billing system for the convergence of telecommunications, internet, e- and m-commerce as well as utilities industries. |
| BestBill | | Offers outsourced billing service for generating paper or electronic bills. |
| BillingOrchard | | Offers an online billing application for freelance developers, web design firms, and contract employees. Features free trial and contact information. |
| BQE Software | | Handles any contract type and accommodates phasing, retainer payments and percent complete billing. |
| BroadSource | | Offering telecom management software and electronic billing for medium to large businesses. Features screenshots and support details. |
| CG Invoicer | | Invoicing and billing software for Windows and Macintosh. Includes online demonstration, download and pricing. |
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