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AI · June 30, 2025

FO

Flexprice: Open-Source Usage-Based Billing Toolkit

Hey HN, I’am Koshima, co-founder of Flexprice (https://flexprice.io/). Flexprice is an open source monetization platform for AI & Agentic companies. You can build usage-based, credit-based, or hybrid pricing models with full control. Usage-based billing works on paper, but breaks fast in production: (1) High-volume data (e.g., 10k API calls/sec from AI inferences) breaks naive pipelines, dropping events and causing underbilling or customer complaints. (2) Backfilling missing events or retroactive discounts screws up invoices, forcing 3 AM log stitching to avoid revenue…

Flexprice: Open-Source Usage-Based Billing Toolkit launched on June 30, 2025 with 7 votes, #3,918 of 7,999 launches that month and more than 75% of that year's launches.

What it does

In the maker’s words, at launch

Hey HN, I’am Koshima, co-founder of Flexprice (https://flexprice.io/). Flexprice is an open source monetization platform for AI & Agentic companies. You can build usage-based, credit-based, or hybrid pricing models with full control. Usage-based billing works on paper, but breaks fast in production…

Does a similar job

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