Switch from Stripe Billing or Chargebee once every invoice matches.

Customers, running subscriptions, SEPA mandates and open receivables move to Kontier. Your payment provider stays. Until the cut-over date both systems bill the same month, and we compare every invoice to the cent.

See the reconciliation

Free, no obligation · three questions, one email address

What moves, what stays and what we settle first.

The fear of switching is rarely the new code. It is whether every subscription, every mandate and every open invoice is still there on cut-over day. So every object is listed here with the field that carries it over.

Movesfrom your current system to Kontier

Customers

Name, address, VAT ID and your own ID
customer.external_id
Products, plans, prices

Tiers, interval and currency
product.pricing_model
Running subscriptions

Plan, quantity and the day they renew
current_period · next_cut_at
SEPA mandates

Mandate reference, signature date, the scan as evidence
reference · signed_on
Open receivables

Open invoices with amount and due date
amount_due · due_date
Invoice history

Past invoices as history on the customer account, for questions and reporting. Nothing is issued again.

Stayswhere it is, unchanged

Your payment provider

Stripe, GoCardless, Mollie or your own bank. No new PSP contract.
Your customer IDs

cus_…, your CRM number or the row in the sheet: it stays readable as external_id.
Your pricing model

Subscriptions, per seat, usage or a mix. Configured, not reinvented.
Your issued invoices

They keep the number and date they were issued with.

Settled firstbefore the first import

Cut-over date

The first day only Kontier issues invoices. Ideally the start of a billing period.
Mandate rail

Whether mandates are collected through your bank, GoCardless, Mollie or Stripe. A mandate never moves to another rail silently.
Tiered prices

Kontier keeps the pricing model on the product, not the price. Two prices on one product are always read the same way.

Parallel run

The parallel run finds what the import missed.

Until the cut-over date, Kontier bills the same periods as your current system, in a sandbox. We compare every invoice: net, VAT, gross. Every difference gets a cause and a fix. Nothing is approved until the difference is €0.00.

CustomerLineStripeKontierΔStatus

cus_3m9q Subscription · monthly €236.81 €236.81 €0.00 match

cus_8f2k API calls · 18,402 €40.00 €87.60€40.00 +€47.60€0.00 mismatch match

Finding Tiers imported as VOLUME: 18,402 × €0.004 = €73.61 net. Stripe bills graduated: 8,402 × €0.004 = €33.61 net.

Fix product.pricing_model VOLUME → STAIRCASE, re-run in the sandbox: €33.61 + €6.39 VAT = €40.00.

cus_71xa Per seat · 12 × €15.00 €214.20 €214.20 €0.00 match

cus_d04p Subscription · reverse charge AT €199.00 €199.00 €0.00 match

cus_k2rv Annual plan €2,380.00 €2,380.00 €0.00 match

1,192 more invoices · all match

Test clock
In the sandbox the month runs on a test clock: renewals, phase changes and dunning steps fall due as they would live.
No mail to customers
A sandbox sends no email to recipients outside your organization and uses no number from your live invoice sequence.
Approved at €0.00
While a difference is open, the cut-over stays blocked. Your current system keeps billing as usual until then.

Sequence

A dated plan, not a leap of faith.

This is what a switch looks like as a plan. The dates here are an example. How long yours takes depends on data volume and pricing model; we set the plan with your data in the first conversation.

2 Nov Mon

Connect

Connect payment providers

Stripe for cards, GoCardless, Mollie or your own bank for SEPA. Your accounts stay as they are.
5 Nov Thu

Import

Catalog, customers, subscriptions, mandates

Prices with tiers, customers with external_id, subscriptions with their renewal day, mandates with reference and signature date.
9 Nov Mon

Parallel run

Same month, two systems

The sandbox bills November on a test clock. Every invoice is compared with your current system.
26 Nov Thu

Approval

Reconciled to the cent

Every difference has a cause and a fix. At a €0.00 difference you approve the cut-over date.
1 Dec Tue

Cut-over

Kontier issues

From the start of the period, invoices, collections and dunning come from Kontier. Your old system issues nothing more.
Jan

Support

Through your first OSS filing

We stay on it until your first OSS filing runs through cleanly.

Where you start

Five starting points, one route.

Billing software, in-house code or a spreadsheet: the sequence is the same. What differs is the place where an import can go wrong. We know it before we start.

Stripe Billing

Today

Subscriptions, invoices and tax in Stripe Billing, cards through Stripe Payments.

With Kontier

Kontier takes over subscriptions, invoices, tax and dunning. Stripe keeps collecting the cards, on the same account.

What we watch

Stripe keeps tier logic on the price, Kontier on the product. graduated becomes STAIRCASE, volume becomes VOLUME.
tiers_mode → pricing_model
Chargebee

Today

Subscriptions and invoices in Chargebee, payments through a connected gateway.

With Kontier

If the gateway is Stripe, GoCardless or Mollie, Kontier connects the same account. Your Chargebee IDs stay readable as external_id.

What we watch

Add-ons and coupons become prices and promotions in Kontier. The parallel run shows whether every discount bills the same.
addon → price · coupon → promotion
Paddle

Today

Paddle sells as merchant of record in its own name and remits the VAT.

With Kontier

With Kontier you invoice in your own name. Kontier decides EU VAT per line and prepares the OSS return. Cards and SEPA run through Stripe, Mollie or GoCardless.

What we watch

This is where the payment route changes. Where saved payment methods cannot come along, customers add them again through a portal link, with no new checkout.
portal link · add_payment_method
In-house code

Today

Cron jobs, webhooks and an invoice table your team maintains next to the product.

With Kontier

Your backend reports events to the API (OpenAPI 3.1). Kontier prices, issues and collects. Your IDs stay as external_id.

What we watch

Usage from running periods is backfilled with a timestamp. The idempotency key keeps an event from counting twice.
POST /v1/usage-events
Spreadsheets

Today

Price list and customer list in Excel, invoices by hand, SEPA mandates on paper in a binder.

With Kontier

The price list comes into the product catalog by CSV import. We move customers and subscriptions out of the sheet with you.

What we watch

Paper mandates are recorded with their signature date and scan. They get the 14-day pre-notification before each debit.
channel: operator · signed_on

From the cut-over

What Kontier takes over from day one.

The same capabilities the platform describes everywhere else. How Kontier compares with Chargebee, Lago and Hyperline is on the homepage comparison (as of July 2026, sources: lago.app, chargebee.com, hyperline.co). See the comparison →

OSS · Reverse charge · VIES

EU VAT

OSS, reverse charge and VIES validation, decided per invoice line and not bolted on.
XRechnung · ZUGFeRD 2.3 · Factur-X

E-invoicing

XRechnung with Leitweg-ID straight from the platform; ZUGFeRD 2.3 and Factur-X as hybrid PDF/A-3 invoices.
SKR03 · SKR04 · CSV

DATEV export

Monthly posting batches with BU keys for § 13b, OSS and the small-business regime, sent straight to your accountant.
CORE · B2B · R-codes

SEPA Direct Debit

CORE through GoCardless, Mollie or Stripe, B2B through your own bank. Returned debits drive retries and dunning.
Versioning · GoBD

Audit trail

A traceable audit trail with plan and price versioning, built for GoBD requirements.
GDPR · Subprocessors

Operated in the EU

Platform data is processed in the EU; details in the subprocessor register. German UI and German-language support.

Let's set your cut-over date.

Three questions, one email address. We reply by email with the next steps of your migration.

from €199/monthStarter, net plus VAT

From €199/month net
14 days free
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No setup fee
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Choose a plan and test

Switching, just not this quarter?

We'll get in touch when there is news on migration, data import and running both systems in parallel.

Switch from Stripe Billing or Chargebee once every invoice matches.

What moves, what stays and what we settle first.

Customers

Products, plans, prices

Running subscriptions

SEPA mandates

Open receivables

Invoice history

Your payment provider

Your customer IDs

Your pricing model

Your issued invoices

Cut-over date

Mandate rail

Tiered prices

The parallel run finds what the import missed.

Test clock

No mail to customers

Approved at €0.00

A dated plan, not a leap of faith.

Connect payment providers

Catalog, customers, subscriptions, mandates

Same month, two systems

Reconciled to the cent

Kontier issues

Through your first OSS filing

Five starting points, one route.

Stripe Billing

Chargebee

Paddle

In-house code

Spreadsheets

What Kontier takes over from day one.

EU VAT

E-invoicing

DATEV export

SEPA Direct Debit

Audit trail

Operated in the EU

Let's set your cut-over date.

Switching, just not this quarter?

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