Thankster

Thankster is a service that prints, stuffs, stamps, seals and mails handwritten cards and letters for businesses. Users supply recipients and message text, and the service produces and sends the mail immediately or on a schedule, covering use cases such as customer appreciation, direct mail marketing, drip campaigns and lead generation.

Features include a card editor with merge fields, system handwriting and calligraphy fonts, custom handwriting styles, QR codes, signatures, automated and drip campaigns, and AI-generated messages and images. Sending can be triggered through direct integrations (including Infusionsoft/Keap, Shopify, NationBuilder and Google Sheets), Zapier, Make, Pabbly Connect, Latenode, Konnectify, viaSocket, Integrately, Albato and Workato, plus an API and Quick Send option. Mail formats include folder cards, flats, postcards and letters, with real first-class stamps.

Thankster is aimed at B2B and nonprofit users across industries such as real estate, insurance, e-commerce and financial services. Packaging includes one-off projects sold as prepaid credit packs and monthly automated plans tiered by cards per month, with usage-based per-card pricing; plans vary by card format, handwriting font allowances, drip campaign steps and daily AI message/image limits.