Kwit is a payment-provider-agnostic billing platform. Connect your zahls.ch account, define your pricing, and let Kwit handle subscriptions, invoices, and dunning - while your payment processor just processes.
Built for the Swiss payment stack:
Kwit gives you the full billing lifecycle on top of the Swiss payment rails you already trust - without locking you into a single processor.
0 Per-transaction fees charged by Kwit on top of your processor.
Swiss QR-bill invoicing, TWINT and card payments via zahls.ch.
Minutes From connecting payments to your first live checkout.
Kwit sits between your app and zahls.ch, and migrates the customers and pricing you already run on Stripe or Polar. Set up in minutes, not days.
Learn moreEverything you need to migrate, bill, and scale - while your payment processor just processes.
Get startedPoint Kwit at your existing Stripe or Polar account - or your live pricing page - and we scrape your plans to automatically create matching products and prices. Bring your customers and subscriptions with you, no rebuild required.
Three steps to go from zero to receiving payments.
Add your zahls.ch API credentials. Kwit provisions webhooks and configures the payment gateway automatically.
Create products with flat or per-unit pricing. Set billing intervals - monthly, yearly, or one-time.
Kwit handles checkout sessions, subscription renewals, invoice generation, and dunning. You focus on your product.
Kwit is the billing layer that sits between your app and your payment processor. It handles the lifecycle - the processor handles the charge.
Stripe, Polar, and others couple billing logic to their payment rails. Kwit separates the two - you own the billing engine, the processor just moves money.
Built for zahls.ch. Supports TWINT, card tokenization, and bank transfers out of the box. Swiss QR Bill invoicing included.
Your customers, your subscriptions, your invoices. Switch payment providers without rewriting your billing logic.
Manage subscriptions, track revenue, and monitor your billing - all in one place.
Developer
Settings
Subscriptions
Manage your active subscriptions.
Active
Trialing
Past Due
Canceled
Est. MRR
Jane Doe
jane@acme.com
Max Müller
max@startup.ch
Lena Huber
lena@design.io
A complete billing platform. You build the product - Kwit handles the money.
Scrape pricing from Stripe, Polar or your site and auto-create matching products.
Flat-rate and per-unit pricing with flexible billing intervals.
Track customers, collection methods, and external identifiers.
Full lifecycle - create, renew, cancel, with trial and proration support.
Automated generation with line items, sequential numbering, and PDF delivery.
Card tokenization, TWINT, and bank transfers via zahls.ch.
Hosted checkout with redirect URLs and session tracking.
Programmatic access with scoped API keys for your integrations.
Real-time event delivery with HMAC signatures and retry logic.
Revenue charts, subscription metrics, and recent activity at a glance.
Automated payment retries and customer recovery flows.
Add billing to your app in minutes. The SDK runs on your server - create customers, start checkouts, and handle lifecycle events via webhooks.
import Kwit from "@kwit/sdk";
const kwit = new Kwit(process.env.KWIT_API_KEY!);
const customer = await kwit.customers.create({
email: "jane@acme.com",
name: "Jane Doe",
currency: "CHF",
});
const { checkoutUrl } = await kwit.checkout.create({
customerId: customer.id,
productId: "product_pro_monthly",
successUrl: "https://app.acme.com/welcome",
cancelUrl: "https://app.acme.com/pricing",
});
// redirect user to checkoutUrlConnect your zahls.ch account, set up your products, and start accepting payments in minutes.