Billing

Open source billing and subscription management platforms give SaaS companies and marketplaces control over one of their most critical systems -- revenue collection. Self-hosted alternatives to Stripe Billing, Chargebee, and Recurly, such as Lago and Kill Bill, handle subscription lifecycle management, usage-based metering, invoicing, and tax calculation on your own infrastructure. Lago has gained significant adoption by providing a usage-based billing engine that companies like Mistral AI and Groq use to meter API consumption in real time. The case for self-hosting billing goes beyond data control: billing logic is deeply coupled to business models, and the flexibility to implement custom pricing schemes (committed-use discounts, tiered usage, hybrid models) without fighting SaaS platform constraints accelerates go-to-market for new pricing strategies. Financial data residency requirements under PCI DSS and regional regulations make self-hosted billing a compliance necessity for many companies. Modern open source billing tools integrate with payment processors (Stripe, Adyen, GoCardless) while keeping all subscription state, invoice records, and revenue data in your database. This enables accurate revenue recognition and financial reporting without depending on third-party API exports. Docker-based deployment with PostgreSQL or MySQL backends makes these platforms operationally manageable. When evaluating self-hosted billing, focus on webhook reliability, proration handling, multi-currency support, and the quality of financial reporting. Self-hosted billing infrastructure compounds in value over time as your pricing models evolve and your financial data becomes an asset for analytics and forecasting.