Try our online invoicing software for 15 days: it's free !

Find out why Flexina Invoicing has been voted the best online invoicing and business management software for 15 years.
  1. Our customer service is always available and ready to help you.
  2. Your data is private, protected and backed up several times a day.
  3. Training, getting started and your custom invoice template are free.
  4. Your accountant can retrieve all your XML invoices (Ubl.be, Peppol) in one click.
  5. Ready for mandatory electronic invoicing (XML/Peppol/UBL).
free invoicing software
Free demo account

* We collect your data in order to allow you to test our software via a "demo" account, to send you the identifiers with which to connect, to respond to your requests for support during the evaluation period and to notify you of the expiration of this account. See our privacy policy
See for yourself how easy online billing is and the quality of our customer service
Try Flexina Billing free for 15 days with no commitment
Free Trial

Flexina Billing also makes your online billing easy on iPhone, iPad, and Android.

Billing software on iPad Billing software for Android
Billing software on iPhone, iPad, Android.

Customer Testimonials

For over 15 years, we've been providing professional quality service in dozens of countries
TWOSEVEN SRL - SECURITY, NETWORK & ELECTRICAL
Loyal to FLEXINA from the start, a true pleasure and a highly efficient daily tool. We tried many different billing software solutions and none offered such flexibility in settings and customization. We can also count on extremely efficient and responsive technical service, which makes every operation very smooth. A must-have for all independent professionals and companies wanting an all-in-one tool without any hassle. Thanks to the entire team!
Lionel Delsart
Led Tech Pro
I've been using Flexina for 13 years, it's an excellent comprehensive billing software (quotes, purchase orders, delivery notes, invoices...). It's easy to use, with its app and Cloud access, it allows access to documents from anywhere and any device. Regular updates including QR code payment are very convenient. I highly recommend this billing solution.
Ugo Genestout
IXTHUS PRINTING
I'm taking this digital pen to say that I find Flexina to be a company that works tirelessly to satisfy us, moreover, with an excellent team behind it, available, attentive, and above all responsive! Nothing to fault, I use Flexina every day, even on weekends, and it works perfectly! 100% recommended.
Guillaume LEDUC
SCHALLER
Since I started using Flexina, my life has changed. Everything is easier, they update very regularly. They always answer the phone, they're really super responsive! Thank you
Albane SCHALLER
PASTITALIA
I was looking for an online program, I found Flexina which solved all my problems, simple and fast and support always available, I highly recommend it.
Sergio Scalirò
LAMARCK LOCKSMITH
We've been using Flexina for our invoices and quotes for several years now, it's a really comprehensive and easy-to-use billing software. We're very satisfied with the service and personal contact with the Flexina team members who are always available to advise us.
Guillaume LEDUC
OPTIBELUX
I've been using Flexina since 2016, the software is super simple and very practical. Keep up the good work to the whole team.
Jonathan Flasschoen
Casa&Co
We've been using Flexina for years. Very easy to use and very easy to handle. We recommend it.
CENGIZ GURSOY
ECHO-VERT PYRENEES OCEAN
Flexina, top-notch software adapted for SMEs on both computer and smartphone. Simple software that meets business needs
Katia Goursaud