Billing infrastructure for Europe's regulatory reality.
Kontorion unifies EU tax, SEPA and e-invoicing in one platform, built for the reality of 27 member states, at the pace modern product teams expect from their tools.
One platform, not three systems.
Subscriptions, payments, EU tax and accounting: most teams assemble this from three separate systems. Kontorion delivers it as one integrated platform, built natively for the EU market instead of retrofitted from US products.
- OSS · RC · VIES
EU tax
OSS, reverse charge and VIES checks as core logic, not a plug-in.
- SEPA
SEPA Direct Debit
Part of the billing run, not a separate tool.
- XRECHNUNG · ZUGFERD
E-invoicing
XRechnung and ZUGFeRD/Factur-X, native to the platform.
- DATEV
DATEV export
Accounting as an export, not an afterthought.
In Early Access, with a small group of design partners.
We'll say it plainly: once the first customers have closed a quarter on Kontorion, we'll let real voices speak. Until then, three things you will never see here:
- No stock photos.
- No invented logos.
- No made-up customer numbers.
What we hold ourselves to.
Honesty over staging
We only communicate what is genuinely live today, and label what sits on the roadmap. An honest gap beats an invented logo.
EU-first
Tax logic, payment methods and e-invoicing are built for the requirements of European finance teams, not adapted. Hosted in the EU, GDPR-native.
Finance-grade correctness
Versioned plans and prices, FX and tax rules frozen at invoice time, a traceable audit log. Existing books are never touched.
Built in Aichach.
Kontorion is a product of Frontier Algorithmics UG (haftungsbeschränkt), based in Aichach, Germany. Full legal details are available in our Legal Notice.
Let's talk.
Whether it's a short demo, technical questions or a conversation about your billing requirements in the EU market, we're reachable.
contact@frontieralgorithmics.com