Payment Providers & Compliance: Stripe, Adyen, Chargebee, Paddle, PayPal Compared

Choosing a payment provider is one of those decisions that seems straightforward until you start digging into tax compliance, European regulations, and the operational burden that comes with processing global payments.

After working with several payment providers across different projects, I have learned that the choice is rarely about transaction fees alone. The real question is: how much of the payment operations burden do you want to own?

This post breaks down the two fundamental payment models, compares five major providers, and offers a decision framework based on team size, geography, and business model.

Payment Processor vs Merchant of Record#

Before comparing individual providers, it helps to understand the two fundamentally different models for accepting payments.

A Payment Processor handles the technical side of moving money. You remain the seller. You are responsible for tax collection, compliance, invoicing, and dispute management. Stripe, Adyen, and PayPal operate this way.

A Merchant of Record (MoR) is the legal seller in the transaction. The MoR provider sells your product on your behalf, handles tax collection and remittance, manages compliance, and deals with chargebacks. Paddle operates as a Merchant of Record.

The distinction matters more than most teams realize at the start. With a Payment Processor, you gain flexibility but accept operational responsibility. With an MoR, you trade some control and margin for significant reduction in compliance work.

Provider Comparison#

Here is how the five major providers compare across the dimensions that matter most for SaaS businesses.

Stripe#

Stripe is the default choice for developer-first teams, and for good reason. The API design is clean, the documentation is thorough, and the ecosystem of tools (Billing, Tax, Connect, Radar) covers most SaaS needs.

The US base rate of 2.9% + $0.30 per transaction is competitive (EEA rates start lower at 1.5% + EUR0.25 for standard cards), but costs can add up. Stripe Tax adds 0.5% per transaction. Stripe Radar for fraud detection adds another 0.05-0.07%. International cards add 1% plus a 1% currency conversion fee. A transaction that starts at 2.9% can quickly reach 5% or more with add-ons.

Stripe works best when your engineering team is strong and you want full control over the payment experience.

Adyen#

Adyen targets larger businesses with complex payment needs. Its Interchange++ pricing model passes through the actual interchange rate plus a small markup, which typically results in lower effective rates for high-volume merchants.

The integration requires more effort than Stripe. Subscription management is not a core strength -- you will likely need a separate billing layer. But for businesses processing across multiple channels (online, in-store, mobile) and regions, Adyen provides a unified platform that few competitors match.

Adyen makes sense when you are processing significant volume and need omnichannel capabilities.

Chargebee#

Chargebee is not a payment processor -- it is a subscription billing and revenue operations platform that sits on top of your payment gateway (typically Stripe or Adyen).

It excels at complex billing scenarios: usage-based pricing, hybrid models, multi-currency invoicing, revenue recognition, and dunning management. If your pricing model involves metered usage, multiple tiers with add-ons, or B2B invoicing with net terms, Chargebee adds significant value.

The trade-off is added complexity. You now have two systems to maintain -- your payment gateway and your billing layer.

Paddle#

Paddle stands apart as a Merchant of Record. This means Paddle is legally the seller. Paddle handles VAT/sales tax calculation, collection, and remittance in every country. You receive a revenue share minus Paddle's fee.

The 5% + $0.50 per transaction fee is higher than Stripe's base rate. But that fee includes tax handling, currency conversion, and dispute management. For a small team without a dedicated finance function, this trade-off often makes sense.

The limitation is flexibility. Paddle is designed for digital products and SaaS. Physical goods, marketplaces, and custom payment flows are outside its scope. If you need Paddle's tax handling but sell physical goods, you may need to look at subscription lifecycle management approaches that combine multiple providers.

PayPal#

PayPal remains relevant primarily for consumer trust and reach. In markets where credit card penetration is low, PayPal (and Venmo in the US) serves as a familiar payment method.

For SaaS businesses, PayPal is rarely the primary processor. It works well as an additional payment method alongside Stripe or Adyen, capturing customers who prefer PayPal checkout over entering card details.

PSD2 and Strong Customer Authentication#

If you accept payments from European customers, you need to understand PSD2 and its Strong Customer Authentication (SCA) requirement.

PSD2 (Payment Services Directive 2) is EU regulation that requires Strong Customer Authentication for electronic payments. SCA means the customer must authenticate using at least two of three factors: something they know (password/PIN), something they have (phone/hardware token), or something they are (fingerprint/face).

3D Secure 2 is the standard protocol for implementing SCA in online card payments. When a European cardholder makes a payment, the issuing bank may challenge the transaction with a 3D Secure authentication step.

All five providers listed above support 3D Secure 2, but the implementation details differ:

• Stripe: Handles SCA automatically with Stripe.js and Payment Intents API. Supports exemptions via Stripe Radar.
• Adyen: Full SCA support with advanced exemption engine. Supports delegated authentication for lower friction.
• Paddle: As MoR, Paddle manages SCA compliance on your behalf.
• PayPal: Handles SCA within the PayPal checkout flow.
• Chargebee: Inherits SCA handling from the underlying payment gateway.

PSD3 is coming. The next iteration of the Payment Services Directive is expected to have implementation deadlines in 2026-2027. It introduces stricter SCA enforcement, updated Transaction Risk Analysis thresholds, and stronger consumer protection rules. All major providers are expected to support PSD3 requirements as they become finalized.

VAT and Sales Tax Complexity#

Tax is where the real operational burden lies. EU VAT rules require you to charge the customer's country VAT rate (not your own). The US has state-by-state sales tax with nexus rules that change as your customer base grows. And countries like India, Brazil, and Australia each have their own digital services tax requirements.

Here is how each provider handles tax:

• Paddle (MoR): Handles everything. Tax calculation, collection, filing, and remittance worldwide. This is Paddle's strongest selling point.
• Stripe Tax: Calculates and collects tax in 50+ countries. You still file and remit. Costs an additional 0.5% per transaction.
• Chargebee: Integrates with Avalara or TaxJar for tax calculation. Filing is separate.
• Adyen: No native tax calculation. Requires third-party tax solution.
• PayPal: No native tax calculation. Manual handling required.

For teams without a dedicated finance function, the tax question alone can tip the decision toward Paddle. For larger organizations with existing tax infrastructure, Stripe Tax or a Chargebee + Avalara combination offers more flexibility.

Decision Framework#

Choosing a payment provider depends on your team, your market, and your business model. Here is a decision tree that captures the key decision points.

A few additional considerations:

• Geography matters. If most of your customers are in the EU, tax compliance is critical. Paddle or Stripe Tax reduces that burden significantly.
• Start simple. Many successful SaaS companies start with Stripe and add complexity (Chargebee, tax solutions) as they grow.
• PayPal as secondary. Regardless of your primary processor, offering PayPal as an alternative payment method captures customers who prefer it.
• Migration is painful. Switching payment providers mid-growth involves migrating customer payment methods, subscription data, and billing logic. Choose thoughtfully upfront.

Code Comparison: Stripe vs Adyen Checkout#

To illustrate the difference in developer experience, here is a side-by-side comparison of creating a checkout session with Stripe and Adyen.

Stripe Checkout Session#

import Stripe from "stripe";
const stripe = new Stripe(process.env.STRIPE_SECRET_KEY!);
async function createCheckoutSession(  priceId: string,  customerId: string): Promise<string> {  const session = await stripe.checkout.sessions.create({    customer: customerId,    mode: "subscription",    payment_method_types: ["card"],    line_items: [      {        price: priceId,        quantity: 1,      },    ],    success_url: `${process.env.APP_URL}/success?session_id={CHECKOUT_SESSION_ID}`,    cancel_url: `${process.env.APP_URL}/pricing`,    // SCA is handled automatically by Stripe    payment_method_options: {      card: {        request_three_d_secure: "automatic",      },    },  });
  return session.url!;}

Adyen Sessions API#

import { Client, CheckoutAPI } from "@adyen/api-library";
const client = new Client({  apiKey: process.env.ADYEN_API_KEY!,  environment: "TEST", // or "LIVE"});
const checkout = new CheckoutAPI(client);
async function createAdyenSession(  amount: number,  currency: string,  reference: string): Promise<{ id: string; sessionData: string }> {  const response = await checkout.PaymentsApi.sessions({    amount: {      value: amount, // Amount in minor units (cents)      currency: currency,    },    reference: reference,    merchantAccount: process.env.ADYEN_MERCHANT_ACCOUNT!,    returnUrl: `${process.env.APP_URL}/checkout/result`,    countryCode: "NL",    // SCA: Adyen handles 3DS2 through its risk engine    authenticationData: {      attemptAuthentication: "always",    },    channel: "Web",  });
  return {    id: response.id,    sessionData: response.sessionData,  };}

The key differences:

• Stripe uses a hosted checkout page by default. You redirect the customer to Stripe's page. Less control, faster implementation.
• Adyen returns session data that you render with Adyen's Drop-in or Components library. More control over the checkout experience, more integration work.
• SCA handling: Both handle 3D Secure automatically, but Stripe's approach requires less configuration.

Both approaches integrate well with entitlement synchronization systems that track what a customer has paid for across platforms.

What I Would Choose Today#

For a new SaaS product with a small team: Paddle. The tax handling alone saves enough time and complexity to justify the higher fee. Focus engineering effort on the product, not on tax compliance.

For a growing SaaS with engineering resources: Stripe with Stripe Tax. The developer experience is unmatched, and the ecosystem handles most needs without a separate billing layer.

For enterprise with complex needs: Adyen for payment processing, Chargebee for subscription billing. This combination handles high volume, multiple payment methods, and complex pricing models.

In all cases: add PayPal as a secondary payment method. The integration effort is minimal, and it captures customers who prefer not to enter card details.

References#

• Stripe Checkout Sessions API Documentation - Official API reference for creating checkout sessions.
• Adyen Online Payments Integration Guide - Official guide for building payment integrations with Adyen.
• Paddle Pricing - Paddle's MoR pricing structure and included features.
• Stripe Strong Customer Authentication Guide - Stripe's guide to PSD2 SCA compliance.
• Adyen PSD2 SCA Compliance Guide - Adyen's implementation guide for PSD2/SCA.
• PSD2, SCA, and 3DS2 Explained (Spreedly) - Overview of European payment regulations.
• 3D Secure and PSD2 Guide for EU PSPs (GPayments) - Detailed guide on 3DS2 implementation for European payment service providers.
• PSD3 Overview (Partisia) - Analysis of the upcoming PSD3 directive and its implications.
• Chargebee Documentation - Official Chargebee subscription billing documentation.
• Stripe vs Paddle vs Chargebee Comparison (Churnmate) - Independent comparison for SaaS billing decisions.
• Adyen Node.js API Library - Official Adyen SDK for Node.js/TypeScript integrations.
• Stripe Fees 2025 Breakdown - Detailed breakdown of Stripe's fee structure including hidden costs.