NEWS: Voluntary registration via the Financial Administration of the Slovak Republic is now open.
Digital Postman
Flowis
- Certified delivery channel for e-Invoices via Peppol
- Receiving, sending, and integrating e-invoices
- Ready for mandatory e-Invoicing from 2027














We are the first Slovak certified digital postal service
for small and large companies using various ERP systems
A trusted solution for companies that want to prepare for mandatory e-invoicing simply and on time.
Solution for large companies
and entrepreneurs
from PDF to BIS 3
For companies whose system cannot create the mandatory e-invoice format.
Peppol Box
Designed for sole traders, smaller companies that only need to receive e-invoices.
No integration
No API, technical linking, or modifications to the existing system.
API integration
Integration for larger organizations, IT companies, and software providers.
Slovensko.Digital
Integration designed for software houses.
OUR PARTNERS
See who chose us
Which group do you belong to?
For companies and individuals, for senders and recipients.
Company with its own accountant
You have issued and received e-invoices clearly in one place. However, if you use another provider for issued invoices, Flowis can only be integrated for received e-invoices.
Company with an external accountant
Even if you handle sending through another digital postal service, you can use Flowis only for received invoices and link it to your accounting system.
Sole trader
A simple solution without complex settings – you can only receive e-invoices, even if you don’t issue them.
Accounting firm
Manage multiple clients from one account.
Other professions
Also suitable for freelancers or schools – you can only receive e-invoices, or send them too, as needed.
Non-VAT payer
You need a digital postal service even if you only receive e-invoices and don’t issue anything.
Non-profit organization
You also need a digital postal service if you are a non-profit organization.
IT company / software provider
Flowis allows you to easily extend your software with e-invoicing without complex development.
Chcete byť pripravení
na e-fakturáciu
od 1. 1. 2027?
Pripravte svoju firmu na rok 2027 už dnes. Stačí sa zaregistrovať.
Features built
on real needs
Conversion of invoices to the mandatory BIS 3 format
You don’t have to change your accounting system. Simply upload the invoice to Flowis, and it will automatically convert it to the structured mandatory format.
Track invoices and their statuses in one place
In a simple and clear application, you can track issued and received e-invoices, their current status, and processing history.
Integration without interference
with the accounting system
Flowis Digital Postman integrates with your accounting system, and invoices are transferred automatically.
Start the video and find out
how e-invoicing works
Flowis Digital Postman simplifies e-invoicing by handling the ‘extras’ too.
How does it work?
The entire system operates on the decentralized Peppol network, managed by the European Commission. Certified Digital Postal Services join the network to ensure the secure transfer of e-invoices from sender to recipient. Simultaneously, they send mandatory data to the Financial Administration of the Slovak Republic. Everything happens fully automatically.
“The transition to e-invoicing went smoothly, and the solution is fully compliant with the requirements of the Croatian Financial Administration. The Flowis team is a proactive, flexible, and reliable partner.
Iva Ćurić
Head of Accounting @ BIPA
A Digital Postal Service can do more
Delegating access
The accountant can work directly in the system; you just approve or check the result.
Quick setup without complications
Flowis is designed so you can handle e-invoicing quickly, even without technical knowledge.
Data for the Financial Administration
Flowis Digital Postman ensures that all necessary data is sent.
Security is paramount
Flowis Digital Postman meets the requirements for secure processing of sensitive data in the EU. Security is the foundation of the entire solution.
Potrebujem Digitálneho poštára?
Zistite to za 60 sekúnd.
Are you interested in a Digital Postal Service?
- Automatic sending and receiving of e-invoices
- Secure encryption and archiving of documents
- Processing of PDF and other data formats into BIS 3
Various packages for companies and entrepreneurs.
Ozveme sa vám s ďalšími informáciami. Ak máte konkrétnu otázku, môžete ju položiť vo fóre.