Dodo Payments

Polar is a billing platform and Merchant of Record aimed at developers building AI-era software. It provides payments, subscriptions, and usage-based billing while handling global tax and compliance for its customers.

**Stripe** is a financial technology company that provides online payment processing software and APIs for businesses of all sizes. Founded in 2010 by Irish brothers Patrick and John Collison, it lets companies accept payments, manage subscriptions and billing, handle tax compliance, prevent fraud, and access treasury and banking tools. Headquartered in South San Francisco and Dublin, it remains privately held.

Paddle is a commerce platform and payments provider for software and SaaS companies. Operated by Paddle, it provides payment processing, subscription billing, invoicing, tax and compliance handling, and related merchant services for software vendors.

Lemon Squeezy is a commerce platform for selling digital products and subscriptions, aimed primarily at software companies. It provides payment processing, subscription billing, licensing, tax/VAT handling and storefront/customer management.

RevenueCat is a subscription and in-app-purchase platform for mobile, smart TV, and web apps. It provides a subscription backend that simplifies purchase implementation, automates receipt validation across StoreKit, Google Play, smart TV, and web, and maintains a unified view of customer and subscription data. Its product tools include configurable paywall templates, audience targeting for paywalls and pricing, A/B testing, subscription analytics, predictive campaign analysis, and web-to-app monetization. The service is free until an app reaches $2,500 in monthly tracked revenue, according to its website.