Melon Post

PostKnock is a marketing platform for small service businesses — dental practices, HVAC contractors, optometrists, chiropractors, veterinary clinics, and home services. It combines direct-mail postcards with automated phone follow-up in a single workflow. Choose a pre-built industry playbook (dental recall, HVAC seasonal, lapsed-patient re-engagement, etc.), upload a contact list, and PostKnock handles printing, USPS First-Class mailing, QR-code tracking, and post-delivery call queues with pre-loaded scripts for your front desk. Multi-wave campaigns sequence postcards and calls over weeks. CSV import auto-maps fields. Real-time tracking shows delivery, scans, completed calls, and revenue attribution. Free plan available — only pay for postcards sent. Pro from $99/month unlocks multi-wave sequencing, the full call queue, and analytics. No contracts. 30-day money-back guarantee.

Stannp is a direct mail marketing platform built to design, schedule, send, automate, and track direct mail at scale. It helps teams print and send direct mail worldwide, including postcards, letters, and self-mailers, while connecting direct mail to modern marketing workflows through more than 1,000 integrations and a custom API. Users can upload a PDF and send letters through virtual printing, create bulk mail campaigns, or set up automated triggered communications for reminders, renewals, newsletters, customer milestones, abandoned carts, lead follow-ups, win-back campaigns, sales, and events. Stannp positions direct mail as a high-impact marketing channel that reaches and engages contacts in a tangible way, combining the visual and tactile nature of print with the tracking, personalization, and automation expected from digital tools. It supports fully personalized follow-up mail, triggered postcards with product images and voucher codes, segmented seasonal campaigns, etc.