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 for e-invoicing
Connect your software to Peppol in days, not months
Peppol Access Point
Introduction - supplier
Product portfolio
Through Flowin’s REST API, software vendors can easily integrate Peppol connectivity into their own applications. The platform offers:
✅ Peppol API (send and receive e-invoices via the Peppol network)
✅ Zoomit Integration (connect to the Belgian Zoomit network for B2C invoicing)
✅ Sandbox Environment (free testing environment for development and QA)
✅ Webhooks & Real-time Monitoring (instant status updates and tracking)
✅ Multi-format Support (Peppol BIS 3.0, UBL.be, and other formats)
With these capabilities, software vendors can provide their customers with complete e-invoicing functionality, including automated validation, routing, and compliance checks aligned with European regulatory requirements.
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 Functionalities
 Send e-invoices
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 Receive e-invoices
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Multi-network connectivity
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Message routing and conversion
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Mapping version control
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✅ Built-in Peppol standard
❌ Direct Peppol registration
❌ Start with a free subscription
❌ Automatic posting of e-invoices
✅ E-invoice status tracking
❌ Direct Peppol registration
❌ Start with a free subscription
❌ Automatic posting of e-invoices
✅ E-invoice status tracking
❌ Real-time monitoring, logging and reporting
✅ Peppol Access Point as a service
✅ White-labeling possible
✅ Peppol directory (SMP)
✅ Peppol test environment
✅ Peppol Access Point as a service
✅ White-labeling possible
✅ Peppol directory (SMP)
✅ Peppol test environment
Additional Functionalities
✅ Helpdesk and support FOR RE-SELLERS ONLY
✅ Modules for cross-border compliance
✅ Data anonymization and privacy management
❌ Audit trail and message archiving
❌ Multi-language user interface
❌ Ability to add attachments to invoices
❌ Mobile or app access
❌Support for e-orders
❌ Integration with Chamber of Commerce or CRM
❌ Built-in notifications for new documents
✅ Secure user authentication and identification
✅ Bulk sending of invoices
✅ Support for hybrid messages
✅ Modules for cross-border compliance
✅ Data anonymization and privacy management
❌ Audit trail and message archiving
❌ Multi-language user interface
❌ Ability to add attachments to invoices
❌ Mobile or app access
❌Support for e-orders
❌ Integration with Chamber of Commerce or CRM
❌ Built-in notifications for new documents
✅ Secure user authentication and identification
✅ Bulk sending of invoices
✅ Support for hybrid messages
✅ Webhook support
❌ Validation according to NL CIUS or other standards
❌ Field-level logging
❌ Mapping version control
✅ Peppol e-invoicing status tracking
✅ Real-time monitoring and error messages
❌ SMP management portal
❌ Load balancers and failover mechanisms
❌ Support for order confirmations and other document types
✅ Support for multi-format transformation
✅ Version control and directory of implementations
❌ Recurring invoices / templates
✅ Data anonymization & privacy management
❌ Validation according to NL CIUS or other standards
❌ Field-level logging
❌ Mapping version control
✅ Peppol e-invoicing status tracking
✅ Real-time monitoring and error messages
❌ SMP management portal
❌ Load balancers and failover mechanisms
❌ Support for order confirmations and other document types
✅ Support for multi-format transformation
✅ Version control and directory of implementations
❌ Recurring invoices / templates
✅ Data anonymization & privacy management
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 in countries | Flowin provides its services worldwide, with a particular focus on Europe, including the Netherlands, Belgium, Luxembourg, Germany, Ireland and Sweden. As a certified Peppol Access Point, Flowin complies with all European standards for cross-border e-invoicing. |
| Generic vs. Specific industries | As a Peppol Access Point, Flowin offers a generic solution suitable for a wide range of industries. The platform primarily targets organizations requiring API integration, including companies in professional services, financial services, ICT & technology, government & public sector, and real estate & property management. Thanks to its API-first design, developers in sectors such as business solutions, retail, construction and more can also integrate seamlessly. |
| Support available in the following languages | English, Dutch, French |
| User interface available in the following languages | English |
| Peppol provider for solutions in the categories | As a Peppol Access Point, Flowin provides the technical infrastructure for e-invoicing. The platform is specifically designed for API integration by software vendors, developers, partners, and large enterprises looking to connect their own systems to the Peppol network. |
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) production 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 Service 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.
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