ChaChing is a billing engine designed to replace Stripe billing while maintaining Stripe for payment processing. Its main purpose is to provide businesses with Stripe Billing's features at 50% lower fees, enabling them to manage subscriptions and invoices efficiently while saving thousands per year.

The platform offers comprehensive subscription and invoicing capabilities including one-off invoices for setup fees or custom services, automated subscriptions with cycles and renewals, and auto-proration on upgrades or downgrades with instant credit calculations. For tax and compliance, it provides pluggable tax engines like TaxJar or Anara, multi-tax products with global compliance for GST, VAT, and sales tax, and custom tax rules.

ChaChing includes robust analytics features such as real-time revenue metrics tracking MRR, ARR, and LTV, high-fidelity growth dashboards, and real-time events visualization for cohort health monitoring. The developer experience features Stripe migration with zero downtime, a testing sandbox for safe iteration, and OpenAPI architecture for standardized integration.

The migration process works by connecting your Stripe account using the secret key, selecting subscriptions to migrate, and reviewing the import of all dependencies to ensure smooth operation. Users continue using Stripe for payment processing while ChaChing handles subscriptions and invoices.

Benefits include saving 50% on billing fees compared to Stripe, managing subscriptions and invoices with ease, and accessing real-time analytics. Use cases include businesses wanting to reduce billing costs while maintaining Stripe payments, companies needing automated subscription management, and organizations requiring global tax compliance.

The product targets small to medium businesses and enterprises looking to cut billing fees. It integrates with Stripe for payments and supports tax providers like TaxJar and Anara. Technical details include 99.99% uptime, under 50 ms API response times, and migration capabilities from Stripe with future support for Chargebee and Recurly.