Accountants

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100% free for accountants & fiduciaries

Your clients' invoices in your accounting software

Keep your tools and your workflow. Flexina automatically delivers your clients' sales and purchase invoices to Expert/M, WinBooks, Exact Online, Sage BOB, Yuki, Octopus… in UBL XML or PDF. No setup, no fees, without changing your accounting software.

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✓ No subscription✓ No installation✓ Nothing changes for you

The Flexina (fox) and Peppol Box (rabbit) mascots delivering a stack of invoices to the accountant

Free for life

for your firm

UBL · XML · PDF

whichever format you want

100 %

free for accountants

Since 2008

invoicing is our craft

Peppol since 2021

ahead of the curve

10+ accounting tools

compatible, your choice

We adapt to you, not the other way around

3 ways to retrieve your clients' invoices

Already using a retrieval platform? Perfect. If not, pick the method that suits you best. Either way, it's free and your clients don't change a thing.

Email Connector — the simplest

Set up your software's import address (Expert/M, WinBooks, Exact Online, Sage BOB, Yuki, ClearFacts…). We send everything automatically in UBL XML or PDF, in just 2 minutes.

Fiduciary portal — the most flexible

View all your clients from the accountant portal, download their sales and purchase invoices, filter by period and export in bulk. Accessible anywhere, no installation needed.

Flexina Sync — the most automated

Full automation. Our desktop app (Windows/Mac) syncs invoices straight into your software's folders, at whatever frequency you choose.

Your clients don't change anything, and neither do you. In UBL XML or even PDF.

Works with your accounting software

Every good accounting package imports invoices in UBL XML, Peppol or PDF. If yours supports import, it works — and you keep the software you already use.

The Flexina mascot delivering neatly sorted invoice folders

Expert/MWinAuditorAdsolutOctopusWinBooksYukiVeniceSage BOBExact OnlineClearFacts

Plus any software that supports UBL / Peppol / PDF import. Not sure? Just ask us →

How does it work? In 3 steps.

Set up automatic retrieval in just a few minutes.

Create your accountant portal

Free sign-up in a few minutes. No card, no commitment.

Your clients link to you

From their Flexina or Peppol Box interface, your clients connect to your firm in one click.

Receive their invoices

Choose your method and format (UBL XML or PDF). Sales and purchase invoices arrive automatically.

Peppol B2G: an opportunity

Guide your clients toward a compliant solution

Peppol is required for the public sector (B2G), and many businesses want to get ready. We offer software built to help your clients move to Peppol — with dedicated support included and clear pricing.

from €20/mo

Flexina Invoicing

Complete business management: quotes, orders, invoices, e-signature, reminders, bank reconciliation, CRM, scheduling…

Discover Flexina

from €5/mo

Peppol-Box

A simple, effective solution for sole traders and merchants who want to send and receive Peppol e-invoices.

See Peppol-Box

from €10/mo

Peppol-Box Integration

For businesses with an existing ERP or software: API, XML sending, PDF-to-XML conversion.

See the integration

Dedicated support included

Your clients call us directly. No tickets, no waiting, no extra charge — support is included in their licence.

Clear, fixed pricing

Prices that don't creep up, with support, maintenance and updates all included. No nasty surprises.

Hosted in Europe, GDPR-compliant

Encrypted transfers and European hosting. Reassure your clients: their data stays protected and compliant with GDPR.

Why accountants choose Flexina

Invoicing specialists since 2008, Peppol live since 2021, UBL XML export for the past 5 years. We know e-invoicing inside out — and it's free for you.

Free for your firm

No subscription, no licence, no hidden fees. Flexina Sync is 100% free for accountants and fiduciaries.

We adapt to your tools

Keep your software and your way of working. We deliver invoices wherever you want, in whatever format you want.

Peppol & UBL compliant

Every invoice issued through Flexina or Peppol-Box meets the Peppol BIS 3.0 and UBL XML standards.

Data secured in Europe

Encrypted transfers, European hosting and GDPR compliance. Your data and your clients' data stay protected.

The key point

Your clients' support? That's on us.

A question, a snag, a step that needs explaining? Your clients call us directly, not you. Our team is reachable by phone, chat and email — and support is included in the licence price.

With Flexina and Peppol Box, your clients will never come to you with a technical issue about using our software. You save time, and they're taken care of.

✓ Our team, real people✓ Phone · chat · email✓ Included, no extra cost

The Flexina support team, shown as the fox mascot wearing a headset, handling your clients' technical questions

Flexina Sync: The Free Solution for Accountants and Fiduciaries

Discover how Flexina facilitates the transmission of electronic invoices to accountants and fiduciaries, free of charge. A Windows and Mac compatible solution, integrated with major accounting software via UBL XML and Peppol.

Flexina Sync: A free and reliable solution for accountants

What is Flexina Sync?

Flexina Sync is a free tool that allows accountants and fiduciaries to automatically receive sales and purchase invoices from their clients in UBL XML Peppol or PDF format, ready to be imported into their accounting software.

Is Flexina Sync really free?

Yes, Flexina Sync is completely free for accountants and fiduciaries. It requires no subscription or paid license.

What are the benefits of Flexina Sync for accountants?

Flexina Sync automates invoice reception and transmission, simplifies accounting management, and ensures seamless integration with accounting software supporting UBL XML and Peppol import.

What invoice formats are supported by Flexina Sync?

Flexina Sync supports UBL XML Peppol and PDF formats, ensuring compatibility with most accounting software.

Is Flexina Sync compatible with Windows and Mac?

Yes, Flexina Sync is available on Windows and Mac, allowing simple and quick installation on all platforms.

How does Flexina Sync work?

How do I activate my accountant account on Flexina?

Simply contact the Flexina team to create your accountant account and access the dedicated interface.

How do I link my clients to my Flexina Sync account?

Your clients activate the connection with your accountant account directly from their Flexina interface.

How do I install Flexina Sync?

Download and install Flexina Sync on your computer. Once installed, configure your invoice receiving directories.

How do I set the invoice synchronization frequency?

You can choose to receive invoices immediately after creation, after sending via Peppol, by email, or according to your preferences.

Integration with accounting software

Which accounting software is compatible with Flexina Sync?

Flexina Sync is compatible with all accounting software accepting UBL XML and Peppol import, including Expert/M, WinAuditor, Adsolut, Octopus, WinBooks, Yuki, Venice, Sage BOB, Exact Online, ClearFacts, and many others.

Does Flexina Sync allow automatic invoice import?

Yes, Flexina Sync enables automatic transmission of sales invoices, purchases and credit notes directly to the defined directory for each client.

Can I set up specific folders for each client?

Yes, Flexina Sync allows you to define specific directories where sales invoices, purchases and credit notes will be saved for each client.

Does Flexina Sync facilitate Peppol electronic invoicing?

Yes, Flexina Sync is designed to integrate with Peppol and UBL XML standards, ensuring smooth e-invoice transmission between businesses and accountants.