About
PromoStack exists for one reason: small teams shouldn't have to build coupon logic, stacking rules, and race-safe redemption themselves. We provide the promotion layer as an API — coupons with stacking and exclusion rules, idempotent redemption, and billing that just works — so you can ship discounts instead of infrastructure.
A redemption is money moving. The engine is race-safe and idempotent by design, not by patching later.
Every dashboard action goes through the same public REST API you get — documented, versioned, and tryable.
Free $0, Starter $29, Growth $79 per month, billed through Paddle. No contact-sales wall, no fine print.
Built by an indie developer for indie SaaS teams: no sales calls, no onboarding theater, no credit card to start.