Lotus is an open-source pricing and billing engine for businesses of any model, including usage-based, per-seat, and custom pricing. Use the real-time system to optimize, test, and deploy your pricing, and streamline metering, entitlements, and invoices.
Looking beyond Lotus, try Lago for a fully open-source Stripe Billing alternative, or Chargebee for mature dunning, taxes, and reporting. Prefer infrastructure control? Octane is cloudβnative, while Paigo automates SaaS billing with 0% fees.