Flexprice

Flexprice is a newer open-source billing platform specifically designed for AI and agentic companies that need sophisticated usage metering and credit systems. Unlike traditional billing platforms, Flexprice is built from the ground up to handle high-frequency, real-time usage events—think API token counts, compute minutes, or request volumes in production systems processing thousands of events per second.\n\nThe platform combines usage metering, credit management, seat-based subscriptions, feature entitlements, and automated invoicing into one composable stack. You can self-host or use their cloud. For indie AI product builders, Flexprice eliminates the pain of building custom billing logic while maintaining full transparency through open-source code. The learning curve is higher than no-code platforms, but it's lower than building billing from scratch.