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Flexina: The Best Online Invoicing Software with Peppol

An intuitive and powerful solution to manage your invoicing with ease.

Ideal for freelancers and SMEs, our software optimizes your daily management with a modern and ergonomic interface. Flexina is designed to meet the requirements of Peppol electronic invoicing.

24/7 access from any device

Invoice online with complete freedom, with multilingual and multi-currency support.

Maximum Security

Your data is hosted in Europe with regular backups.

Dedicated Customer Support

Enjoy personalized support from our team of experts.

All-in-One Management Software, 100% Modular

Pay only for the features you need with Flexina, the tailor-made management software that adapts to your business.

Create Unique Quotes and Invoices with Your Own Customizable Templates!

Complete freedom of customization for your quotes and invoices.

With Flexina, design professional business documents that reflect your company's image.

Custom design for your quotes and invoices

Customize the layout, colors and add your logo.

Flexible Terms and Conditions

Easily add and modify your clauses on the back of your documents or as attachments

Payment QR Code

Include an EPC QR code on your invoices that allows your customers to make transfers quickly.

Master Your Cash Flow in Real Time

Automated and intelligent cash flow management.

Instantly visualize your financial status and automate customer reminders.

Real-Time Tracking

Track the status of your invoices and payments with clear and instant indicators.

Automatic Bank Reconciliation

Access your bank statements to automatically reconcile your sales and purchase invoices.

Online payments

Accept online payments for your invoices via Digiteal, Stripe or PayPal without complications.

Optimize Your Customer Relations with Flexina CRM

A complete dashboard to manage your customers and suppliers.

Keep a detailed history of every interaction and strengthen your customer relationships.

Centralized Customer Management

Create complete customer files with commercial history and personalized tracking.

Automated BCE and VAT Data

Instantly import and verify BCE data and VAT numbers via VIES.

Integrated Commercial Tracking

Organize your tasks and commercial notes directly in each customer file.

Mandatory in 2026: Adopt Peppol Electronic Invoicing

Anticipate the legal requirement for Peppol electronic invoicing in Belgium and prepare your business now.

Peppol electronic invoicing becomes mandatory for all Belgian companies by January 2026. Flexina supports you in this transition.

Complete Peppol Invoicing

Issue and receive Peppol electronic invoices compliant with the future 2026 obligation.

Guaranteed Compliance

Solution certified by SPF Bosa, in accordance with Peppol standards for B2B and B2G in Belgium.

Simplified Transition

Start your transition to mandatory Peppol electronic invoicing in 2026 now.

Electronic Signature for Quotes and Purchase Orders

Secure and accelerate the electronic signature of your quotes and purchase orders with our legal and certified solution.

Our electronic signature solution enables instant validation of your quotes and purchase orders, in compliance with legislation.

Legal Electronic Signature

Legally sign your quotes and purchase orders with our secure electronic signature solution.

Real-Time Signature Tracking

Automate the electronic signature process for your business documents with instant notifications.

Simplified Quote Validation

Quickly obtain electronic signatures on your quotes and convert them to purchase orders.

Business Planning Integrated with Your Commercial Management

Centralize planning, tasks and invoicing in a single interface adapted to all business sectors.

Manage your activity with professional planning connected to your administrative and commercial management.

Multi-Activity Planning

Manage interventions, projects and tasks directly linked to your customer files.

Integrated Management

Connect your planning to quotes, orders and invoices automatically.

Collaborative Planning

Coordinate teams and track task progress in real time.

Send Your Invoices to Your Accountant with Ease

Flexina Sync allows your accountant to automatically receive your invoices, with no effort on your part.

With Flexina, no need to manually send your invoices to your accountant! Thanks to Flexina Sync, your accountant can directly receive all your sales invoices, purchase invoices and credit notes in their accounting software, in the right format (UBL XML Peppol, PDF...). A simple, smooth and fully automated solution.

Easy connection with your accountant

Your accountant activates Flexina Sync and automatically receives all your invoices without additional action.

Automatic transmission

Your invoices are sent in real time as soon as they are created or after validation (Peppol, PDF, etc.).

Zero effort, zero errors

No more manual sending! Your invoices arrive directly in your accountant's software, in the right format.

Flexina: Concrete Innovations for Your Daily Management

Intelligent modules that simplify your management: PrestaShop import, AI invoice scanning, electronic signature and much more.

Developed over 15 years with our customers, Flexina integrates your needs into features that save you time.

PrestaShop Import to Peppol

Automatically import your PrestaShop orders to convert them into Peppol electronic invoices with one click.

AI Scanning of Purchase Invoices

Digitize your supplier invoices with our artificial intelligence module that automatically extracts data.

Integrated and Connected Modules

CRM, planning, quote electronic signature: all your management tools centralized in a single interface.

Frequently Asked Questions about Invoicing Software and Management Solutions

Find answers to the most frequently asked questions about invoicing software, business management tools and accounting solutions

General information about invoicing software

What is invoicing software, a quote and invoice program, a business management tool, a solution for creating invoices?

An invoicing software, also called a quote and invoice program or business management tool, is a digital solution that simplifies business administrative management. Flexina goes beyond simple invoicing by offering a complete suite including management of quotes, invoices, purchase orders, delivery notes and purchases. This all-in-one solution efficiently manages the entire commercial cycle, from supplier orders to customer invoicing, including inventory management and electronic signature of quotes.

What are the main features offered by invoicing software to help with business management?

Invoicing software features have evolved significantly in recent years. Today, Flexina offers you much more than a simple tool for creating invoices:

  • Paperwork becomes child's play: No more administrative headaches! In just a few clicks, your quotes transform into orders then into invoices. You save tremendous time and avoid re-entry errors.
  • Everything is connected, everything is simple: Imagine having all your activity in one place: your sales, purchases, schedules... No need to juggle between different software, everything is there at hand.
  • Your daily assistant: Flexina watches over your business: it reminds you of invoices to follow up, stock to order, and alerts you when an opportunity arises. It's like having an extra collaborator!
  • More informed decisions: At a glance, you know where your sales stand, who your best customers are, and which products are flying off the shelves. No need to be an Excel expert to understand your activity.

In short, Flexina takes care of all the administrative part so you can focus on what matters: growing your business.

Is invoicing software suitable for entrepreneurs, VSEs and SMEs?

Management software like Flexina perfectly adapts to all business sizes, offering tailored features for each situation:

For self-employed entrepreneurs:

  • Daily simplicity: Create your quotes and invoices in just a few clicks with ready-to-use templates

For VSEs / SMEs:

  • Complete management: Manage your entire activity (purchases, sales, inventory, cash flow) from a single interface
  • Facilitated growth: Evolve peacefully thanks to modules adapted to your needs (multi-user, multi-company discounts)

Flexina evolves with you: start with the essential features for your activity, then activate new modules as you grow. It's the assurance of a solution that adapts to your needs, without ever holding you back.

Pricing and free versions

Is it possible to get a free version of invoicing software and what are its limitations?

Beware of so-called free invoicing solutions! In reality, they often hide important limitations that can hinder your activity: blocked features, limited number of invoices, or worse, dependence on a system that risks wasting your time and money.

At Flexina, we made a different choice: to offer a fair and transparent price, unchanged for 15 years. For a reasonable investment, you benefit from:

  • A complete solution without feature restrictions
  • Personalized support for your success
  • Regular updates at no extra cost

With the best value for money on the market, Flexina is a profitable investment that sustainably accompanies your company's growth. Why risk your company's future with a free solution when you can have a professional tool for a few euros per month?

Electronic signature and payments

Why choose a quote and invoice program with electronic signatures and online payments?

Customer satisfaction also involves modernizing your tools! Flexina radically transforms your customers' experience by simplifying each step:

No more back-and-forth with documents: your customers sign their quotes directly online. No need to print, scan or mail. A simple click is enough to validate an order.

Payment becomes as simple as online shopping: your customers instantly pay their invoices via a secure interface. Result? Your sales close faster and your cash flow improves.

This digital fluidity gives your company a modern image and sets you apart from the competition. Your customers appreciate this time saving and simplicity that make their lives easier.

Why use a quote and invoice program to have your customer quotes signed?

Using a quote and invoice program to have your customer quotes signed offers many advantages. Here's why it can transform your sales process:

  • Time saving: With a quote and invoice program, you can create, send and have your quotes signed in just a few clicks. No need to print, scan or send documents by mail. Everything is done online, which significantly speeds up the process.
  • Professionalism: An electronically signed quote gives a modern and professional image of your company. Your customers will appreciate the simplicity and speed of the process, which can improve their satisfaction.
  • Security and compliance: Electronic signatures are secure and legally recognized. They guarantee the authenticity and integrity of documents, reducing the risks of fraud and disputes.
  • Real-time tracking: You can track the status of your quotes in real time, know when they have been opened, signed or refused. This allows you to react quickly and improve your conversion rate.
  • Process automation: Once the quote is signed, the program can automatically generate the corresponding invoice, send notifications and update your management systems. This reduces manual tasks and the risk of errors.

Flexina offers a complete quote and invoice solution with integrated electronic signature. Thanks to Flexina, you can simplify and accelerate your sales processes while offering an optimal customer experience.

QR Codes and SEPA payments

What is an EPC QR code on an invoice, a SEPA payment QR code, a bank transfer QR code, a QR code to pay or a QR code for invoice?

An EPC QR code (European Payments Council) or SEPA payment QR code is a standardized 2D barcode that revolutionizes payments in Europe.

Present on invoices, this bank transfer QR code encodes all the information necessary for payment:

  • Beneficiary's IBAN
  • Amount to pay
  • Invoice reference
  • Beneficiary details

This QR code to pay allows customers to settle their invoices instantly via their mobile banking app by simply scanning the code, thus eliminating manual entry errors.

The QR codes for invoice are automatically generated by modern invoicing software according to SEPA standards, facilitating:

  • Cross-border payments
  • Automatic bank reconciliation
  • Simplified management of incoming payments

This digital payment solution considerably simplifies the payment process while ensuring the reliability of transmitted data.

What is the display of SEPA payment QR Code on invoices and quotes with deposit request, how to generate a QR code for deposit invoice, where to place the bank QR code on documents?

The display of SEPA payment QR Code on invoices and quotes optimizes the collection of deposits and payments. The system works as follows:

  • For standard invoices: the QR code automatically encodes the total amount to pay
  • For deposit requests: the QR code contains only the requested deposit amount
  • For signed quotes: possibility to include a QR code for deposit payment

The advantages of this feature:

  • Facilitated deposit payment by customers
  • Reduction of bank details entry errors
  • Faster collection of deposit requests
  • Automated tracking of received payments

This digital payment solution integrates perfectly into the invoicing and deposit management process, significantly improving cash flow tracking.

Electronic invoicing and Peppol

How to convert a PDF invoice to a Peppol electronic invoice?

Converting a PDF invoice to a Peppol electronic invoice may seem simple, but it requires special attention to ensure compliance with the standards and formats required by the Peppol network. Here are the general steps:

  1. Using OCR and AI: While tools like OCR (Optical Character Recognition) and AI can extract data from a PDF file, it is often necessary to manually re-enter all necessary information (invoice number, date, amount, lines, totals, etc.) to map them correctly to the electronic format.
  2. Choose compatible software: Use invoicing software that natively supports the Peppol format. This will save you many intermediate steps and ensure smooth and compliant conversion.
  3. Take advantage of the obligation in Belgium: With the electronic invoicing obligation in Belgium, it's the perfect time to adopt software that natively handles the generation of Peppol electronic invoices. This not only simplifies the process but also ensures legal compliance.

Flexina facilitates this process by natively integrating Peppol compatibility, allowing you to generate compliant electronic invoices quickly and efficiently.

How to send your invoices to your accounting software?

With electronic invoicing, sending your invoices to your accounting software becomes much simpler and more efficient. Here's how to proceed:

  • Using electronic invoicing: Most modern accounting software is already compatible with importing invoices in electronic format. This means you can send your invoices directly from your invoicing software to your accounting software without having to manually re-enter information.
  • Process automation: Electronic invoices are automatically imported into your accounting software, reducing the risk of errors and saving you valuable time.
  • Contact your accountant: To ensure everything is properly configured and you're using best practices, don't hesitate to contact your accountant. They can guide you and help you optimize your invoicing and accounting processes.

Flexina offers an electronic invoicing solution that integrates perfectly with major accounting software. Thanks to Flexina, you can send your invoices directly to your accounting software smoothly and effortlessly, while benefiting from automation and data accuracy.

Planning and integrated management

Why use planning integrated with your invoicing and business management?

Using planning integrated with your invoicing and business management software offers many advantages for optimizing your business management. Here are some reasons why this is beneficial:

  • Information centralization: With integrated planning, all your management information (appointments, tasks, invoices, quotes) is centralized in one place. This gives you a clear overview and allows you to manage your activity more efficiently.
  • Time saving: You no longer need to juggle between multiple tools or applications. Everything is accessible from a single interface, saving you valuable time.
  • Better organization: Integrated planning helps you better organize your days and those of your collaborators. You can plan appointments, deliveries, and tasks to be completed, while having visibility on everyone's availability.
  • Project tracking: You can track the progress of your projects in real time, from quote creation to final invoicing. This allows you to better anticipate needs and ensure optimal customer follow-up.
  • Error reduction: By automating certain administrative tasks, such as generating invoices from scheduled appointments, you reduce the risk of errors and ensure better accuracy in your documents.

Flexina offers planning integrated with its invoicing and business management solution, allowing you to benefit from all these advantages for smoother and more efficient management of your business.

Have a specific question?

Our team of experts is here to help you make your choice and answer all your questions about Flexina.

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Customer testimonials

For over 15 years, we have been offering quality professional service in about ten countries

TWOSEVEN SRL

SECURITY, NETWORK & ELECTRICAL

"Always loyal to FLEXINA, a real pleasure and a very efficient tool on a daily basis. We had tried many different invoicing software and none of them offered such flexibility in settings and customizations. A must have for all freelancers and companies who want an all-in-one tool without any hassle."
Lionel Delsart

Led Tech Pro

LED Technology

"I have been using Flexina for 13 years, it's an excellent invoicing software that is complete (quotes, purchase orders, delivery notes, invoices...). It is easy to use, with its app and Cloud, it allows access to documents from anywhere and with any device."
Ugo Genestout

IMPRIMERIE IXTHUS

Printing

"I find that Flexina is a company that fights hard to satisfy us, with an excellent team behind it, available, attentive, and especially responsive! I use Flexina every day, even on weekends, and it works perfectly! 100% recommended."
Guillaume LEDUC

SCHALLER

Services

"Since I started using Flexina, my life has changed. Everything is easier, they update very regularly. They always answer the phone, they are really super responsive! Thank you"
Albane SCHALLER

PASTITALIA

Restaurant

"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 in Switzerland."
Sergio Scalirò

SERRURERIE LAMARCK

Locksmith

"We have been using Flexina to create our invoices and quotes for several years now, it's a really complete and easy to use invoicing software. We are very satisfied with the service and human contact with Flexina team members."
Guillaume LEDUC

OPTIBELUX

Optics

"I have been using Flexina since 2016, the software is super simple and very practical. Best wishes to the whole team."
Jonathan Flasschoen

Casa&Co

Decoration

"We have been using Flexina for years. Very easy to use and handle. We recommend it."
CENGIZ GURSOY

ECHO-VERT PYRENEES OCEAN

Environment

"Flexina, top software adapted to SMEs on computer as well as smartphone. Simple software meets business needs"
Katia Goursaud