| Price from | — | — |
| Free plan | — | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| API | Yes | Yes |
| Plans published | 0 | 0 |
| Spec score · e-Invoicing Software | 7.2 (#10) | 7.3 (#8) |
| Compliance | The service supports e-invoicing and tax reporting compliance, validation services, data transformation, global network connectivity, and Peppol. | Fonoa states that it is GDPR compliant and uses independent third-party security firms for regular penetration tests, with reports available under NDA. |
| Headquarters | Vienna, Austria | Dublin, Ireland |
| Integrations | ecosio lists integrations for SAP, Oracle, Sage, Microsoft, and Infor ERP systems. | Fonoa’s products share a platform data model; its E-Invoicing page says invoice data can flow into return preparation when Returns is connected. |
| Intended customers | The solution is described as designed for organisations operating across multiple countries, ERPs, and compliance frameworks. | Fonoa describes its platform as serving digital businesses that need to manage indirect tax across markets; its about page says its founders saw the challenge while working at Uber. |
| Pricing availability | The e-invoicing page directs visitors to request more information rather than displaying a price. | The product pages invite visitors to book a demo; they do not state a price on those pages. |
| Security | ecosio states that data in transit is protected using TLS 1.2 and 1.3 and data at rest using industry-standard encryption such as AES-256. | Fonoa says it hashes user credentials, encrypts transactional data using protocols such as TLS, and conducts security assessments and penetration testing. |
| Support | ecosio says e-invoicing customers receive a dedicated Integration Engineer to help with technical issues. | Fonoa’s API documentation says customers obtain an API subscription key after onboarding by contacting its technical support team. |
