Lemon Squeezy

Dodo Payments is a merchant-of-record and subscription billing platform for digital products and software. It manages subscription lifecycles, payments, refunds, and disputes, and provides the resulting transaction and customer data for analytics and integrations.

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.

Square is a financial services and mobile payments company founded in 2009 and now a business unit of Block, Inc. It offers payment processing hardware and software, point-of-sale systems, online payments, payroll, and small-business services such as lending and inventory management.

Flippa is an online marketplace for buying and selling online businesses and digital assets, including websites, SaaS products, eCommerce stores, mobile apps, domains and YouTube channels. The platform hosts listings, auctions and brokered sales to connect buyers and sellers.