Payments tools for AI-built apps
Taking money: payment processors and merchants of record. 3 options, each with its free plan and the catch.
Every payments option
Stripe
The standard payments API: cards, wallets, subscriptions (Billing), hosted Checkout and no-code Payment Links.
Free No setup or monthly fees; you pay per successful transaction Lemon Squeezy
A merchant of record for digital products and SaaS. It collects and remits sales tax and VAT for you, and handles subscriptions, license keys and checkout.
Free No monthly feePolar
A developer-focused merchant of record for subscriptions, one-off sales and usage billing, with publicly posted rates.
Free Starter plan: no monthly feeFree tiers side by side
The first two lines of each free plan, and the price where paid plans start.
| Tool | Free plan | Paid from |
|---|---|---|
| Stripe | No setup or monthly fees; you pay per successful transaction; US pricing: 2.9% + 30¢ per domestic card charge | See the pricing page |
| Lemon Squeezy | No monthly fee; 5% + 50¢ per transaction | See the pricing page |
| Polar | Starter plan: no monthly fee; 5% + 50¢ per transaction | Pro: $20/month (3.8% + 40¢ per transaction) |