Every app needs billing and nobody wants to build it twice. SparkPay gives you a hosted pricing page, Stripe checkout, PDF invoices and a type-safe kit for gating features by plan in your own code. It covers the commercial side too: coupons, referrals, win-back campaigns and tax-ready exports. An MCP server lets an AI assistant read and change plans and revenue. Runs on your own Stripe account. Free for one app up to $1,000 processed.
I build small SaaS products and kept rewriting the same billing layer every time: pricing page, checkout, webhooks, feature gates, invoices, the lot. SparkPay is that layer pulled out so I stop doing it, and it now runs the billing for every product I own.
It sits on your own Stripe account, so you keep the customer relationship and the money never passes through me.
The free tier covers one app and the first $1,000 processed, no card. I would genuinely rather hear what it gets wrong than get a polite upvote, so tell me.