Letstamp vs Loyalty Interchange Protocol

Letstamp is a digital loyalty platform for restaurants, cafés, beauty salons, retail stores and other businesses. It supports stamp cards, reward points, birthday and referral campaigns, new-customer offers, coupons, gamification and catalog products. Restaurants can set rewards for dine-in, takeaway and repeat visits, send targeted offers, and manage campaigns across multiple locations. Businesses can review customer activity and reports, segment customers, send gifts, and contact customers by SMS or push message. They can also publish a branded app on the App Store and Google Play, with their logos, colors, banners and in-app pages. POS integration can synchronize products and trigger campaigns for selected products, with settings for each branch; an API is available for connecting existing systems. Letstamp states that it has no customer limit and allows unlimited reward distribution. The Platform plan costs $32 a month, billed monthly, for one branch and two campaigns, with a 7-day trial. White Label App costs $96 a month, billed monthly, for one branch and ten campaigns. Letstamp was founded in 2009 and is headquartered in Istanbul, Turkey.

Loyalty Interchange Protocol (LIP) is an open-source loyalty platform and vendor-neutral transaction protocol for restaurant technology teams that own integration work. Its checkout lifecycle includes member lookup and enrollment, balances and ledger history, order evaluation, accrual, redemption, reversal, and refund-safe adjustments. Its restaurant order model represents items, modifiers, discounts, fees, taxes, tips, tenders, and totals across channels such as drive-thru, kiosk, web, mobile, pickup, delivery, and catering. Supported program types include points, visits or stamps, wallet credit, paid membership, and hybrid multi-account programs.

The `/platform/v1` API covers profiles, consent, behavioral events, segments, campaigns, connectors, imports, analytics, and attribution. The maker provides an Apache-2.0 reference stack for self-hosting with Docker Compose or Node.js 22 and newer. Storage described includes SQLite-backed local storage and tenant-scoped PostgreSQL for multi-instance use. Customer sign-in remains external. LIP 0.2.0 is described as pre-1.0 infrastructure, not a turnkey no-code marketing service; CSV member imports are limited to 1 MiB and 1,000 rows.