E-invoicing service without installation or cost

Free e-invoicing service. A simple and secure way to manage records, issue invoices, track payments, and communicate with SEF — all in one place. Register now!

Why our service?

Advantages that make our service the best choice for your business.

No installation required
Works instantly, directly from your browser
Access from all devices
Manage invoices and reports for multiple companies in one place
No trial versions or hidden costs

Fast invoice creation
Send invoices to customers via email directly from the app
All invoices – from SEF and outside SEF – in one record
Incoming invoice tracking
Complete overview of invoices, collections, and payments

Secure service
Continuous improvements
Detailed reports on collections and payments
Fast support
Sending invoices to SEF and receiving invoices from SEF
Create regular, advance, final invoices and pro forma invoices

How does it work?

Watch short video tutorials and start working in just a few minutes.
View tutorials

Improve your business, digitize your processes

Zentrix Lab LLC is a software company based in Pančevo, with many years of experience in developing business software for various industries. If you're interested in seeing some of our solutions or need custom software development, feel free to contact us.

Our solutions include: