Chargebee - Chargebee lets you manage subscriptions and payments at scale, handle custom recurring billing scenarios, reduce subscription churn and simplify accounting.

CouponScout - Get notified when your discount codes leak

Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.

LenderKit - LenderKit is an advanced level crowdfunding solution that allows you to create and run your online investment business quickly.

Recurly - Subscription billing and recurring billing management. Recurly offers enterprise-class subscription billing for thousands of companies worldwide.

Offices for Startups - Rent, sublet and sell office spaces for startups companies. Leading marketplace for commercial real estates in the world, for renting, buying or selling.