Optimized for SMEs and freelancers in Luxembourg

Easy-to-Use Invoicing Software A complete and intuitive solution for your business management

Easy-to-use online invoicing software to enhance your business management

Flexina is the most comprehensive invoicing and business management software in Luxembourg. Designed to meet the needs of SMEs and freelancers, it offers an all-in-one solution including invoicing, scheduling, CRM, electronic signature, and much more.

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

Flexina: The Best Online Invoicing Software with Peppol

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

Benefit from personalized support from our team of experts.

All-in-One, 100% Modular Management Software

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

Flexina online invoicing software interface for Luxembourg
Complete customization freedom for your quotes and invoices.

Create Unique Quotes and Invoices with Your Own Custom Templates!

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

Tailor-Made Design for Your Quotes and Invoices

Customize the layout, colors, and add your logo.

Modular Terms & Conditions

Easily add and modify your clauses on the back of your documents or as an attachment.

Payment QR Code

Include an EPC QR code on your invoices to allow clients to make quick bank transfers.

Customizable quote and invoice template editor with real-time preview
Automated and intelligent cash flow management.

Take Control of Your Cash Flow in Real-Time

Instantly visualize your financial status and automate customer follow-ups.

Real-Time Monitoring

Track your invoices and payments with clear and instant indicators.

Automatic Bank Reconciliation

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

Online Payments

Accept online payments for your invoices via Digiteal, Stripe, or PayPal effortlessly.

Dashboard for managing unpaid invoices and client reminders in the Flexina software
A comprehensive dashboard to manage your clients and suppliers.

Optimize Customer Relations with Flexina CRM

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

Centralized Client Management

Create complete customer records with business history and personalized tracking.

Automated VAT Data

Import and verify VAT numbers instantly via VIES.

Integrated Business Tracking

Organize your tasks and business notes directly within each customer record.

Flexina CRM interface with task management and integrated customer tracking
Maximize your business performance with our complete commercial management suite.

Boost Your Revenue with Flexina Invoicing

Optimize your financial tracking and make informed decisions with detailed statistics and real-time analysis.

Real-Time Financial Dashboard

Instantly view your revenue, with automatic updates for each invoice.

Detailed Business Analytics

Utilize detailed statistics by VAT rate, country, customer categories, and products.

Strategic Business Reporting

Manage your business with clear graphs and customized performance indicators.

Real-time sales statistics and graphs from the Flexina invoicing software
Secure and accelerate the electronic signing of your quotes and purchase orders with our legal and certified solution.

Electronic Signature for Quotes and Purchase Orders

Our electronic signature solution allows for 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 signing process of your business documents with instant notifications.

Simplified Quote Validation

Quickly obtain the electronic signature of your quotes and convert them into purchase orders.

Electronic signature of quotes and purchase orders with real-time tracking
Centralize planning, tasks, and invoicing in a single interface tailored to all business sectors.

Planning and Task Management Integrated into Your Business Software

Manage your operations efficiently with a professional planning tool connected to your administrative and commercial processes.

Multi-Activity Planning

Manage interventions, projects, and tasks directly linked to your client records.

Integrated Management

Automatically connect your planning to quotes, orders, and invoices.

Collaborative Scheduling

Coordinate teams and track task progress in real time.

Flexina business planning software integrated with invoicing and management
Adopt Peppol electronic invoicing, recommended for B2B and mandatory for B2G transactions in Luxembourg.

Electronic Invoicing with Peppol in Luxembourg: Stay Ahead of Legal Requirements

Peppol electronic invoicing is already required for transactions with the Luxembourg public sector. Flexina helps you simplify this transition and optimize your invoicing process.

Compliant Peppol Invoicing

Send and receive electronic invoices that comply with Peppol standards for transactions with the government and B2B partners.

Security and Traceability

A reliable and secure solution recommended for businesses looking to automate their electronic invoicing.

Easy Transition to Peppol

Flexina helps you implement Peppol electronic invoicing, making transactions with public administrations and business partners effortless.

Peppol: Invoice sent and received electronically in compliance with Luxembourg regulations
Smart modules that simplify your management: PrestaShop import, AI-powered invoice scanning, electronic signatures, and more.

Flexina: Concrete Innovations for Your Daily Management

Developed over 15 years in collaboration with our clients, Flexina integrates features that save you time and enhance efficiency.

PrestaShop Import & Electronic Invoicing

Automatically import your PrestaShop orders and convert them into Peppol-compliant invoices with one click.

AI-Powered Invoice Scanning

Digitize your supplier invoices using our AI-powered module that automatically extracts key data.

Integrated & Connected Modules

CRM, planning, electronic signature for quotes—all your management tools centralized in one interface.

Flexina's innovative modules: PrestaShop import, AI scanning, electronic signature, planning, and CRM

Flexina: The Complete Guide to Electronic Invoicing and Billing Software in Luxembourg

Discover everything you need to know about mandatory electronic invoicing in Luxembourg, compliance with Peppol, and the risks of free invoicing software. Flexina offers a reliable and cost-effective alternative for freelancers, small businesses, and SMEs, without subscriptions and with optimized management of quotes and invoices.

Flexina: More Than Just an Online Invoicing Software

What is Flexina, and why choose it as an online invoicing software in Luxembourg?
Flexina is an online invoicing and quotation software designed to simplify business management for freelancers, small businesses, and SMEs in Luxembourg. Unlike other solutions, Flexina does not require a subscription and offers a modular approach, allowing you to customize your software according to your needs without unnecessary costs.
Which invoicing software is best for small businesses in Luxembourg?
The choice of invoicing software depends on your needs. Flexina is ideal for freelancers and small businesses in Luxembourg due to its user-friendliness, comprehensive management of quotes and invoices, and mandatory Peppol electronic invoicing for B2G with strong recommendations for B2B.
Is Flexina an invoicing software for Mac?
Yes, Flexina is an online invoicing software accessible from any device, including Mac, without installation. It works on all modern browsers, allowing you to manage your invoicing from anywhere.
Is invoicing software mandatory in Luxembourg?
With the digitalization of invoicing in Luxembourg and mandatory Peppol electronic invoicing for B2G, it becomes essential to use compliant invoicing software. Flexina meets electronic invoicing requirements and ensures a smooth transition to new regulations.
Is Flexina an electronic invoicing software for Luxembourg?
Yes, Flexina is an electronic invoicing software designed to comply with legal requirements in Luxembourg. It enables issuing and receiving electronic invoices that adhere to Peppol and UBL 3Bis standards, ensuring full compliance with current legislation.
Is Flexina a quotation and invoicing software for the construction industry in Luxembourg?
Yes, Flexina is a quotation and invoicing software tailored for professionals in the construction industry. It allows you to manage deposits, apply specific VAT rates, and include detailed line items. You can also track project progress with our intervention management module.

Mandatory Electronic Invoicing in Luxembourg

Why is electronic invoicing mandatory in Luxembourg?
Electronic invoicing via Peppol is mandatory for all transactions with public administration (B2G) and strongly recommended for B2B exchanges. This reform aims to modernize business transactions, automate accounting, and simplify tax controls.
What are the benefits of Peppol electronic invoicing for Luxembourg companies?
Adopting Peppol allows Luxembourg companies to:
- **Facilitate exchanges with Benelux companies**, where electronic invoicing is widely adopted.
- **Simplify accounting export and automate invoice recording**.
- **Reduce payment delays and simplify transaction management**.
Does Flexina support the reception and import of e-invoices in Peppol format?
Yes, Flexina does not only allow sending e-invoices but also supports receiving and automatically importing purchase invoices in XML Peppol format. With our AI-powered scanning system, supplier invoices are automatically integrated into your accounting, reducing manual entry and errors.

Payments and SEPA QR Code in Luxembourg

Why use the SEPA QR Code on your invoices in Luxembourg?
The SEPA QR Code allows your clients to directly scan the code on the invoice to make an instant payment. This payment method, already widely supported in Belgium, is becoming more common among Luxembourg banks.
Does Flexina allow the integration of a SEPA QR Code on invoices?
Yes, Flexina allows you to add a SEPA QR Code directly to your invoices. This makes it easier for your clients to pay and reduces the time required for payment settlement.
See for yourself the ease of online invoicing
and the quality of our customer service
Try Flexina Invoicing for free for 15 days without obligation

You can also contact us to get a free demonstration with a Flexina Invoicing advisor.

Flexina Invoicing makes your online invoicing easy on iPhone, iPad and Android.

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

Customer testimonials

For more than 10 years, we have been providing quality professional service in dozens of countries.
TWOSEVEN SRL - SECURITY, NETWORK & ELECTRICAL
Faithful to FLEXINA since always, 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 latitude in settings and customizations. You can also count on an extremely efficient and responsive technical service, which makes each handling very smooth. A must have for all freelancers and companies who want an all-in-one tool without any hassle. Thanks to the whole team!
Lionel Delsart - Belgium
Led Tech Pro SARL.
I have been using Flexina for 13 years, it is an excellent invoicing software which is complete (quote, order form, delivery note, invoice, etc.). It is easy to use, with its application and the Cloud, it allows access to documents from anywhere and with any device. Regular updates whose payment with QR code is very practical. I highly recommend this invoicing solution.
Ugo Genestout – Switzerland
PRINTING IXTHUS
I take this digital pen to say that I find that Flexina is a company that fights hard to satisfy us, what's more, with an excellent team behind, available, at the listen, and above all reactive! Nothing to complain about, I use Flexina every day, even on weekends, and it works great! 100% recommended.
Guillaume LEDUC – France
SCHALLER SARL
Since 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 - Luxembourg
PASTITALIA SARL
I was looking for a program online, I found flexina which solved all my problems, simple and fast and the support always available, I highly recommend it in Switzerland.
Sergio Scalirò – Switzerland
SERRURERIE LAMARCK
We have been using Flexina to make our invoices and quotes for several years now, it is a really complete and easy-to-use invoicing software. We are very satisfied with the service and the human contact with the members of the Flexina team, who are always available to advise us.
Guillaume LEDUC – France
OPTIBELUX S.A.
I've been using Flexina since 2016, the software is super simple and very practical. Good luck to the whole team.
Jonathan Flasschoen – Luxembourg
Casa&Co SA
We have been using Flexina for years. Very easy to use and very easy to handle. We recommend it.
CENGIZ GURSOY – Switzerland
SAS ECHO-VERT PYRENEES OCEAN
Flexina, top-of-the-line software suitable for SMEs on computers and smartphones. simple software meets business needs
Katia Goursaud – France
The online invoicing software Flexina Invoicing is ready for the electronic invoicing
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