Portreeve
One API call links repeat signups, cards and devices to catch trial and credit abuse.
Portreeve screens every signup, login and checkout through one API call and links accounts by device, card and email to catch trial abuse, AI credit farming, self-referrals and coupon stacking that per-account rules miss — for example, catching a self-referral where the referrer and claimer share the same device and card. It returns allow, review or block with a reason attached, and in the sample dashboard flagged 37 of 1,284 daily screenings (2.9%) and held 4 payouts for review. The free tier covers 1,000 screenings a month, no card required.
What holds up
- +Links accounts by device, card and email — catches the same person behind many emails
- +Every decision comes back with its reason, unlike a CSV export and a gut call
- +1,000 free screenings a month, no card required, live in one API call
- +Holds a referral payout automatically when referrer and claimer share a device and card
Mind the limits
- −No pricing shown beyond the free 1,000 screenings a month — cost after that isn't on the page
- −Requires wiring an API call into your signup, login and checkout flows, not a no-code dashboard
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