Building billing is hard

Building billing today feels like 𝑎𝑠𝑠𝑒𝑚𝑏𝑙𝑖𝑛𝑔 𝐼𝐾𝐸𝐴 𝑓𝑢𝑟𝑛𝑖𝑡𝑢𝑟𝑒 𝑤𝑖𝑡ℎ 𝑝𝑎𝑟𝑡𝑠 𝑓𝑟𝑜𝑚 𝑑𝑖𝑓𝑓𝑒𝑟𝑒𝑛𝑡 𝑏𝑜𝑥𝑒𝑠.

You’re trying to ship a new pricing plan.

• Feature gating lives in one system
• Usage metering in another
• Invoicing is separate

Each box almost fits.
But none come with the same manual.

And when something breaks?
Good luck figuring out where.

Shipping a “simple” pricing change turns into:
4 tools, 3 teams, and 10 Slack threads.

We flipped it.
At Flexprice, we're building an open source metering and billing platform for AI and agentic companies. With Flexprice, teams can roll out usage-based, credit-based, or hybrid pricing models with ease. It handles metering, pricing, and invoicing so AI companies can focus on building, not billing.

Broke it all down in a blog:

https://flexprice.io/blog/why-usage-based-billing-is-an-engineering-problem