P 
Polar
Open-source merchant of record billing built for developers.
NOT REALLY
why this verdict
Keep it — OpenAI has not replaced it
OpenAI's version overlaps, but does not finish the finance job, so this one is still worth keeping open.
- A named launch, not a vibe named, unlinked
- Codegen makes billing look easy until tax and dunning arrive. OpenAI, April 1, 2025 — no announcement link recorded yet.
- How much of the job it covers not the job editorial call
- Parts of it. The job still needs the tool to get finished.
- Is there a free way to do it? paid only
- 3 replacements listed, all paid.
- What the call is worth nothing to cancel
- No paid entry tier tracked, so there is no subscription to cancel.
Reason composed from the fields above missing: announcement linked missing: free replacement listed recorded: two or more escape hatches
- Threatened by
- OpenAI
- Since
- April 1, 2025
- List price
- free
- Per year
- —
The backstory
Polar grew fast on X by pairing merchant-of-record tax handling with an API and usage-based billing aimed at AI products that charge per token. Cursor will happily generate your billing code; it will not remit VAT in twenty-seven countries on your behalf.