| CloudTrade | United kingdom | E-Invoicing services provider | Ordering, Supply Chain, Invoicing | Buyers, Suppliers |  |
| Comarch | Poland | E-Invoicing services provider, Software vendor | Ordering, Supply Chain | Buyers, Suppliers | |
| ebpSource | United kingdom | Software vendor, Reseller, Multi-channel payment service provider, E-Invoicing services provider, E-billing services provider, Supply chain finance specialist | Invoicing, Payments, Ordering, Supply Chain | Buyers, Suppliers | |
| OpusCapita | Finland | E-Invoicing services provider | Contracting, Ordering, Invoicing, Payments, Supply Chain | Buyers, Suppliers | |
| Order2Cash | Netherlands | E-Invoicing services provider | Invoicing, Payments, Collection | Buyers, Suppliers | |
| Saphety | Portugal | E-Invoicing services provider, Bank, Software vendor, Reseller | Contracting, Ordering, Invoicing, Payments, Supply Chain | Buyers, Suppliers | |
| Tungsten Corporation Ltd | United kingdom | E-Invoicing services provider, Supply chain finance specialist | Invoicing, Payments, Supply Chain, Purchasing | Buyers, Suppliers | |
| 1eEurope | Switzerland | Software vendor | Supply Chain, Invoicing | Buyers, Suppliers | |
| 20/20 vision Europe | Netherlands | E-Invoicing services provider, Software vendor | Contracting, Ordering, Invoicing, Payments | Buyers, Suppliers | |
| 2C change | Denmark | Software vendor, Reseller | Invoicing | Buyers, Suppliers | |
| @UK PLC | United kingdom | E-Invoicing services provider | Ordering, Invoicing, Payments | | |
| AC Camerfirma SA | Spain | E-Invoicing services provider | Contracting, Ordering, Invoicing, Payments | Buyers, Suppliers | |
| Accelya | Spain | E-Invoicing services provider | Invoicing | Buyers, Suppliers | |
| AcceptEmail | Netherlands | Multi-channel payment service provider, E-billing services provider | | Suppliers | |
| Accounting Plaza | Netherlands | E-Invoicing services provider | Invoicing | Buyers, Suppliers | |
| ACI WORLDWIDE | United states | Software vendor | Invoicing, Payments | Buyers, Suppliers | |
| Acom Solutions | United states | Software vendor | Invoicing, Payments | Buyers, Suppliers | |
| AddComm | Netherlands | Biller | Invoicing | Buyers, Suppliers | |
| Aderant | United states | Software vendor | Invoicing | Suppliers | |
| ADESLIN | France | Software vendor | Invoicing | Buyers, Suppliers | |