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

Causal App - Causal replaces your spreadsheets and slide decks with a better way to perform calculations, visualise data, and communicate with numbers. Sign up for free.

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

Pry Financials - Finance for Founders

Zuora - Zuora creates cloud-based software on a subscription basis that enables any company in any industry to successfully launch, manage, and transform into a subscription business.

Finmark - Financial planning software for startups