Flowin is the e-invoicing platform of Wolters Kluwer, a global provider of professional information, software solutions, and services. As a certified Peppol Access Point, Flowin offers an API-first solution that enables software vendors to connect their applications to the Peppol network within just a few days. The platform combines the reliability of Wolters Kluwer with modern API technology, designed specifically for developers of ERP systems, accounting software, and other business applications looking to offer seamless e-invoicing capabilities to their customers.
Flowin by Wolters Kluwer - API voor e-facturatie
Connect your software to Peppol in days, not months
Peppol Access Point
Introduction - supplier
Product portfolio
Via a modern REST API, Flowin provides software vendors with direct access to the Peppol network. ERP providers, accounting platforms, and other software developers can integrate full Peppol connectivity into their own applications — including sending and receiving e-invoices — without having to manage the complexities of network certification and compliance themselves.
Integration is deliberately straightforward. A free sandbox environment allows developers to build and test connections before going live. Webhooks and real-time monitoring provide immediate status updates and full transaction traceability. In addition to Peppol, Flowin also offers connectivity with the Belgian Zoomit network for B2C invoicing.
The platform supports Peppol BIS 3.0 and provides automatic validation, routing, and compliance checks in line with applicable European legislation.
✅ REST API for Peppol integration in your own software
✅ Zoomit integration for Belgian B2C invoicing
✅ Free sandbox test environment
✅ Webhooks and real-time status monitoring
✅ Peppol BIS 3.0 support
Prices
Flowin uses a flexible pricing model tailored to the type of usage. For software vendors who invoice on behalf of multiple customers, the platform offers a monthly subscription with a low minimum commitment. Transaction fees range from €0.20 to €0.80 per company using the service, depending on volume and selected options (such as Basic Access Point or Guaranteed Delivery). For precise pricing details, you can request a quote directly through the Flowin website.
Company information
| Name | Flowin |
| Location | Diestsepoort 1, 3000 Leuven, Belgium |
| Founded | 2017 |
| Employees | 201-500 |
| Specialization | Einvoicing trough Peppol |
| International presence | Belgium, the Netherlands & Europe |
| Website | https://myflowin.com/ |
| linkedin.com/company/example |
Overview of features and services
Key Features
Additional Features
✅
Send|e-invoices
This invoicing portal can send electronic invoices via the Peppol network in the standardized Peppol format.
✅
Receive|e-invoices
The software can receive electronic invoices via the Peppol network in the standardized Peppol format.
✅
Peppol standard|built-in
The software comes with a built-in connection to the Peppol network.
✅
Peppol Ready
The software offers an API or standard connector to connect to the Peppol network.
✅
E-invoicing | status tracking
The portal supports status notifications regarding the delivery and processing status of sent Peppol e-invoices.
Secondary Properties
✅
Data Anonymization and Privacy Management
Services to protect sensitive data in accordance with privacy laws such as the GDPR.
✅
Secure user authentication and identification
For example, two-factor authentication, iDIN, eHerkenning, or other eIDAS notified eID services.
✅
Bulk sending of invoices
Send multiple invoices in a single action via Peppol, for example, based on a batch or selection.
Helpdesk
| Available via | ONLY OFFERED FOR RE-SELLERS. Available: via e-mail. |
| Opening hours | Monday to Friday: 9:00 – 18:00 CET |
| Supported languages | English, Dutch, French |
Market focus
| Active countries | Flowin offers its services worldwide via the Peppol network, with specific compliance support for the Netherlands, Belgium, Luxembourg, Germany, Ireland, and Sweden. As a certified Peppol Access Point, Flowin meets all European standards for cross-border e-invoicing. |
| Generic vs. specific industries | Flowin is industry-agnostic and provides a generic API solution suitable for a wide range of sectors, including business services, financial services, ICT and technology, government and public sector, retail, and construction. Thanks to its API-first design, software developers in any sector can integrate seamlessly with the Peppol network. |
| Network integrations | Flowin provides Peppol connectivity via a certified Access Point and additionally supports the Belgian Zoomit network for B2C invoicing. Integration is handled via a REST API with OAuth authentication and webhook support, suitable for connecting to ERP systems, accounting packages, and other business software. |
| User interface available in the following languages | English |
| Customer profile | Flowin exclusively targets software vendors, developers, and large enterprises looking to connect their own systems to the Peppol network via API integration. The platform does not offer an end-user portal. Technical support is available for resellers and integration partners in Dutch, English, and French. Flowin is backed by the infrastructure and reliability of Wolters Kluwer. |
Integration capabilities
✅ Yes, a generic (API) connector is available
Flowin provides a comprehensive REST API that enables developers to integrate external systems with the Flowin platform. This API is designed for maximum flexibility and supports integrations with a wide range of ERP, accounting, and invoicing systems.
Certifications
Peppol PKI certificate
Software vendors with their own Peppol production certificate can send and receive Peppol messages directly over the network, without relying on third parties. For customers, this typically results in faster e-invoice processing, fewer errors, increased reliability, shorter support lines, and lower costs by eliminating external service providers.
Peppol certified provider
A certified Peppol Service Provider is recognized by Open Peppol as a trusted access point to the PEPPOL network, meaning the provider meets all technical, security, and interoperability requirements for sending and receiving e-invoices and other business documents.
Peppol.nu Analysis
Flowin is a strong choice for software vendors and organizations seeking a modern, API-driven solution for Peppol connectivity, backed by the reliability of Wolters Kluwer. The platform stands out for the speed at which integrations can be completed—literally “in days, not months”—thanks to extensive documentation, a free sandbox environment, and robust support.
The Flowin API is designed specifically for developers and includes all modern standards such as REST APIs, OAuth authorization, and webhook notifications. This makes it especially attractive for ERP providers, accounting platforms, and software vendors who want to offer e-invoicing without dealing with the complexity of Peppol compliance themselves. With SSL/TLS encryption and regular security audits, the platform meets the highest security standards.
An important distinction is that Flowin focuses on B2B API integration rather than end-user functionality. It is therefore less suited for small businesses looking for a simple invoicing portal, but highly suitable for mid-sized to large organizations (50+ employees) and software vendors who want to enable e-invoicing for their customers.
Flowin also plays a key role in the DigiCrowd initiative, a collaboration between major software providers in Belgium aimed at accelerating the adoption of electronic invoicing. This partnership enhances interoperability and support within the Belgian market, particularly through integration with the Zoomit network for B2C invoicing.
Best Match
Flowin is best suited for software vendors, ERP providers, and developers seeking a powerful API solution to integrate Peppol connectivity into their own software. It is also an excellent fit for mid-sized to large organizations with international ambitions and a need for flexible, scalable e-invoicing via Peppol—supported by the extensive technical capabilities and stability of Wolters Kluwer.
Social Media
