Appup pictoAppup

Get paid online. In complete security.

Stripe, PayPal, subscriptions, marketplace — we integrate the payment system that fits your business. Secure, smooth, compliant.

Stripe Certified ArchitectStripe Certified Developer

A failed payment is a lost customer.

78% of cart abandonments are linked to a payment process that's too complex or not reassuring enough. We make sure that's never your case.

Secure Stripe online payment integration by Appup

Maximum security

PCI-DSS, 3D Secure, end-to-end encryption — your customers pay with confidence, your data is protected.

Smooth experience

One-click payment, embedded form, no external redirect. The ideal journey to maximise your conversions.

Tailor-made

One-off, recurring, with commission or marketplace — we adapt the architecture to your exact business model.

Every transaction counts. We make sure none fails.

Whatever your business model, we've already integrated a similar system.

01

One-off payment

Selling products, services, bookings. One click, the customer pays, you get paid.

02

Subscriptions

Monthly, annual, freemium plans. Handling of upgrades, downgrades, trial periods and automatic reminders.

03

Marketplace & commissions

Stripe Connect, split payments, fund redistribution between sellers and platform. KYC included.

04

Automated invoicing

Invoice generation, payment reminders, credit notes. All automated via Stripe Billing or equivalent.

Stripe Certified. Not just users.

We don't just "plug in" Stripe. We are Stripe Certified Architect and Stripe Certified Developer — which means we master the full architecture: webhooks, idempotency, dispute handling, SCA compliance.

The result: a robust payment system that handles edge cases without breaking and scales with your growth.

Beyond integration: we optimise your flows.

A payment that works is the baseline. We go further with strategic monitoring of your flows: understanding, month after month, where your revenue really comes from and where it leaks.

Then we run a flow optimisation to maximise your margins — transaction fees, failed-payment recovery, payment method mix: every detail changes what you actually collect.

The technologies we integrate

01

Stripe

The reference for online payments. Checkout, Elements, Connect, Billing, Invoicing.

02

PayPal

The universal classic. Buttons, Smart Payment, Payouts — ideal for international markets.

03

Apple Pay & Google Pay

One-tap payment on mobile. Integration via Stripe or directly in your native apps.

04

Transfers & SEPA

Recurring SEPA direct debits, instant transfers — perfect for B2B and large amounts.

Payments integration

On quote

for an integration on your site or app

PCI-DSS compliantStripe Certified

What's included

  • Account compliance setup
  • Integration of the chosen solution
  • Secure payment system
  • Post-payment webhook handling
  • Email confirmation sending
  • Full testing and validation
  • Supported go-live

Available options

Billing strategy consulting, strategic flow monitoring, flow optimisation to boost your margins, subscriptions, marketplace/connect, automated invoicing, dispute handling

The scope depends on the complexity of the integration and your project's constraints.

Discuss my project