Kill Bill has been the leading open-source billing and payment platform for the past 15 years. Organizations around the globe, from startups to public companies, trust Kill Bill to invoice billions every year. Why scale with Kill Bill? Unlike proprietary SaaS solutions that penalize your growth by taking a percentage of your revenue, Kill Bill offers a robust infrastructure at a predictable, fixed cost. We give you full control over your financial data and architecture, with absolutely no vendor lock-in.