Adyen vs Polar

Adyen is a global payments company founded in Amsterdam in 2006 by Pieter van der Does and Arnout Schuijff, and listed on Euronext Amsterdam since 2018. Adyen runs its own acquiring, processing and risk stack in one system, so a merchant gets one contract and one report for card payments, local payment methods and in-store terminals across many countries. Customers include Uber, Microsoft, eBay and OpenAI.

The platform covers online checkout through Drop-in and Components SDKs, point-of-sale terminals, Tap to Pay on phones, RevenueProtect fraud scoring, network tokenization, payouts, and Adyen for Platforms for marketplaces that onboard and pay sub-merchants. Pricing is published and usage-based: a fixed $0.13 processing fee per transaction plus a payment method fee, such as Interchange++ plus 0.60% for Visa and Mastercard. There are no setup or monthly fees, though a minimum invoice can apply depending on industry.

Adyen fits large retailers, travel and mobility companies, and marketplaces processing high volumes across several regions, where unified data and acquiring margins matter. It is a poor fit for small shops: onboarding is sales-led, integration needs developers, and support is tuned for enterprise accounts. Stripe is easier for startups and SaaS billing, PayPal brings consumer wallet reach, and Square suits small in-person sellers.

Adyen keeps growing: H1 2026 net revenue was about EUR 1.3 billion, up 19% year on year, and in July 2026 it completed the acquisitions of Talon.One (loyalty and promotions) and Orb (usage-based billing).

Polar is an open-source merchant of record and monetization platform for developers, based in Stockholm and founded by Birk Jernström. It started as a way to fund open-source work and evolved into a full payments platform for selling SaaS subscriptions, digital products and access to software, with global tax compliance handled because Polar is the legal seller.

Polar provides hosted and embedded checkout, subscriptions with trials and upgrades, usage-based billing driven by metered events, license keys, a customer portal and discounts. A distinctive feature is benefits: purchases can automatically grant access to a private GitHub repository, a Discord role, file downloads or license keys, which suits developer products and paid communities. SDKs for TypeScript and Python, adapters for Next.js and other frameworks, webhooks and a public API make integration fast, and the codebase itself is open source. The free Starter plan charges 5% plus 50 cents per transaction, and paid plans from $20 a month lower that fee.

Polar fits indie developers, open-source maintainers and small SaaS teams that want low fees and developer-friendly tooling. As a young company it has fewer enterprise features, a smaller support team and less history than established providers. Lemon Squeezy, now owned by Stripe, offers a similar indie-friendly experience at higher fees, Paddle is better for larger SaaS companies needing invoicing and sales-assisted deals, and Stripe alone is cheaper if you can manage tax yourself.