Skip to main content New EU e-invoicing mandate from 2027 - Kontier issues XRechnung & ZUGFeRD natively

Built for Europe

The billing layer
for Europe.

Kontier turns catalogs, seats and usage events into paid, audit-proof invoices - EU VAT OSS, XRechnung, SEPA and DATEV in one API.

Start free for 14 days

Problem

Every pricing change becomes an engineering project.

6+ months

is what a product team typically spends on billing integration, tax edge cases and dunning - instead of the product.

2,184

EU tax rules under 2006/112/EC apply to every invoice - with OSS thresholds, FX and proration.

5-10%

of revenue is lost to failed SEPA debits and cards without active dunning.

Self-serve and usage-based models exploded the demands on billing. Generic payment plugins and DIY pipelines break at the first pricing change. We rebuilt the stack: one layer that bills the way Europe audits.

Learn more

Core systems

Four systems. One billing layer.

Monetize, bill, collect, close - standalone or chained into one pipeline. The same API runs a prototype and production.

  1. Monetize

    Catalogs, seats, tiers, promos and usage metering as data, not code. Pricing changes without a deploy.

    Catalog synced …

  2. Bill & tax

    One event in, one XRechnung out. 2,184 tax rules, OSS, FX pinning and proration in a single pass.

    Billing & taxing …

  3. Collect & recover

    SEPA, Stripe and GoCardless with R-transaction routing. Dunning, retries, wallets and holds built in.

    Collecting …

  4. Close & audit

    Signed ledger, IFRS 15 / ASC 606, GoBD and DATEV export. Month-end close without Excel.

    Ledger signed …

Live product

Watch Kontier work.

Four screens from the real product - what your finance and engineering teams use every day.

Sample data
Search commands⌘K
Welcome to Kontier
€42,380 collected from 36 invoices this week
EUR (€) Last 12 months
Annual recurring revenue €1,486,200
Customers: 1,284ARPA: €1,158
Outstanding receivables €84,350
Open: 23Late: 4Failed: 0
Cashflow €312,480
Recurring: €248,100One-off: €64,380
Events · today142
Events · last 7 days1,284
Events · last 30 days5,847
EU VAT OSS, aggregated live

Comparison

The EU billing comparison.

14 criteria against Lago, Chargebee and Hyperline - continuously updated.

  • Fully supported
  • Partially supported
  • Not supported
Where Kontier wins, and where it doesn't.
Kontier Lago Chargebee Hyperline
EU VAT (OSS, reverse charge, VIES) Partially supported Partially supported
SEPA Direct Debit (CORE + B2B)
XRechnung (native, with Leitweg-ID)
IFRS 15 / ASC 606 rev rec Partially supported Partially supported
Plan & price versioning (replay-safe)
Per-invoice FX pinning Partially supported Partially supported Partially supported
Volume discounts, graduated tiers & packages (with formulas) Partially supported
Wallets + holds + prepaid
Marketplace settlements Partially supported Partially supported Partially supported
AI dunning + R-transaction routing Partially supported Partially supported Partially supported
RFC 9457 errors + idempotent webhooks Partially supported Partially supported
Test clocks + sandbox keys
German UI + support Partially supported
Managed Cloud (EU-only) Partially supported Partially supported Partially supported

EU VAT (OSS, reverse charge, VIES)

  • Kontier Fully supported
  • Lago Not supported
  • Chargebee Partially supported
  • Hyperline Partially supported

SEPA Direct Debit (CORE + B2B)

  • Kontier Fully supported
  • Lago Not supported
  • Chargebee Fully supported
  • Hyperline Fully supported

XRechnung (native, with Leitweg-ID)

  • Kontier Fully supported
  • Lago Not supported
  • Chargebee Not supported
  • Hyperline Not supported

IFRS 15 / ASC 606 rev rec

  • Kontier Fully supported
  • Lago Partially supported
  • Chargebee Partially supported
  • Hyperline Not supported

Plan & price versioning (replay-safe)

  • Kontier Fully supported
  • Lago Not supported
  • Chargebee Not supported
  • Hyperline Not supported

Per-invoice FX pinning

  • Kontier Fully supported
  • Lago Partially supported
  • Chargebee Partially supported
  • Hyperline Partially supported

Volume discounts, graduated tiers & packages (with formulas)

  • Kontier Fully supported
  • Lago Not supported
  • Chargebee Partially supported
  • Hyperline Not supported

Wallets + holds + prepaid

  • Kontier Fully supported
  • Lago Not supported
  • Chargebee Not supported
  • Hyperline Not supported

Marketplace settlements

  • Kontier Fully supported
  • Lago Partially supported
  • Chargebee Partially supported
  • Hyperline Partially supported

AI dunning + R-transaction routing

  • Kontier Fully supported
  • Lago Partially supported
  • Chargebee Partially supported
  • Hyperline Partially supported

RFC 9457 errors + idempotent webhooks

  • Kontier Fully supported
  • Lago Not supported
  • Chargebee Partially supported
  • Hyperline Partially supported

Test clocks + sandbox keys

  • Kontier Fully supported
  • Lago Not supported
  • Chargebee Not supported
  • Hyperline Not supported

German UI + support

  • Kontier Fully supported
  • Lago Partially supported
  • Chargebee Fully supported
  • Hyperline Fully supported

Managed Cloud (EU-only)

  • Kontier Fully supported
  • Lago Partially supported
  • Chargebee Partially supported
  • Hyperline Partially supported

As of July 2026. Based on publicly available documentation from each provider. ZUGFeRD, Factur-X, Peppol, and DATEV are available in Kontier.

Sources: lago.app · chargebee.com · hyperline.co

Logos and trademarks are property of their respective owners. No endorsement implied.

Run next month's billing on Kontier.

With your real data, in your own workspace. Fourteen days is enough to know.

Test free

Deepdive

How the billing layer is built.

Tax engine

2,184 rules under 2006/112/EC, OSS thresholds, FX pinning and proration - decided per line item, not per country.

Signed ledger

Every posting signed and chained. IFRS 15 / ASC 606, GoBD-compliant, with DATEV export to your accountant.

Dunning & routing

R-transaction codes drive retry strategies. Wallets, holds and multi-rail collection recover revenue that would otherwise lapse.

How it works

From usage event to paid invoice.

Connect catalog & usage.

REST API, SDKs or dashboard. One event is enough.

Pick a blueprint.

12 business models - from per-seat SaaS to outcome-based. With formula and API example.

Bill & close.

XRechnung out, SEPA collection in, DATEV export to your accountant.
Business Models

Pick your business model. The blueprint is already here.

Twelve documented blueprints with ready-made API calls - configure, don't rebuild.

See all blueprints in the docs
  • SaaS per-seat
    Billing formula seats × price/month, day-exact proration API example 
    POST /v1/subscriptions
{ "price": "pro_seat_v3", "quantity": 12 }
  • API platform
    Billing formula calls × €0.0004, tiered from 5M API example 
    POST /v1/usage
{ "meter": "api_calls", "quantity": 18402 }
  • Cloud infrastructure
    Billing formula vCPU-h × €0.031 + egress GB × €0.02 API example 
    POST /v1/usage
{ "meter": "vcpu_hours", "quantity": 713.5 }
  • Marketplace + payouts
    Billing formula GMV × 12% commission → split payout API example 
    POST /v1/charges
{ "amount": 10000, "split": { "fee": 1200 } }
  • Reseller network
    Billing formula list price − 30% margin, per partner tier API example 
    POST /v1/invoices
{ "customer": "reseller_…", "price": "tier_gold" }
  • Domain registrar
    Billing formula registration + renewal × years, promo-ready API example 
    POST /v1/subscriptions
{ "price": "domain_renewal" }
  • Hybrid PaaS
    Billing formula base €49 + usage beyond free quota API example 
    POST /v1/usage
{ "meter": "build_minutes", "quantity": 420 }
  • Subscription box
    Billing formula €29.90/month, −15% annually API example 
    POST /v1/subscriptions
{ "price": "box_monthly" }
  • Telco carrier
    Billing formula base price + GB tiers API example 
    POST /v1/usage
{ "meter": "data_gb", "quantity": 38.2 }
  • Creator platform
    Billing formula revenue − 10% platform fee → payout API example 
    POST /v1/charges
{ "amount": 500, "split": { "creator": "acct_…" } }
  • Enterprise SaaS
    Billing formula flat per entity + PO reference API example 
    POST /v1/invoices
{ "customer": "entity_de_…", "price": "ent_flat" }
  • Outcome-based services
    Billing formula flat fee + bonus per milestone API example 
    POST /v1/invoices
{ "price": "milestone_golive" }

FAQ

Questions we hear often.

Is Kontier a payment provider?
No. Kontier sits on top of your payment providers: Stripe for cards, GoCardless for SEPA direct debit. You don't need a new PSP contract. Kontier drives collection, retries and dunning through the providers you already have.
How does migration work?
Most teams are fully migrated in under two weeks. We provide a migration tool and personal support throughout the switch.
Where is my data stored?
In European data centers. Your data never leaves the EU. GDPR compliance is not an add-on, but a foundation of the architecture.
What does Kontier cost?
After the 14-day trial with real data, from €199/month net (plus VAT) - cancel monthly, no setup fee. The free trial applies to the self-serve plans Starter and Scale; Enterprise and On-Premise run through a conversation. All plans are on the pricing page.
Can I cancel and export my data at any time?
Yes. Kontier is cancellable monthly, and your data - customers, invoices, accounting data - is fully exportable at any time. No lock-in.
What support do I get at launch?
Migration concierge, blueprint setup, and a direct line to engineering. We stay on it until your first OSS filing runs through cleanly.

See Kontier on your business model.

  • 14 days free (Starter & Scale)
  • from €199/month net
  • cancel monthly

  1. Test free

    14 days, with your real data in your own workspace.

  2. Get an API key

    Sandbox with real EU tax rules.

  3. Issue your first invoice

    XRechnung-compliant from day one.

Test free

Book a demo

Book a technical demo. 15 minutes with an engineer on your specific pricing model and tax setup.

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Prefer email? Reach us at contact@frontieralgorithmics.com

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