
Postalytics
PostcardMania
Mailjoy
Lob
PostGrid
Automated postcard campaigns with built-in phone follow-up. Send recall cards, seasonal promos, and reactivation postcards. Free to start, Pro from $99/mo.

Simple, reliable & efficient distributed task queue for C++

Website, pricing, platforms and company facts side by side.
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| Website | postknock.com | github.com |
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| Company | 2026 | — |
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In their own words, as submitted to SaaSHub.


PostKnock combines direct mail postcards with automated phone follow-up calls in a single platform. Choose a pre-built campaign playbook (dental recall, HVAC seasonal, etc.), upload your contact list, and PostKnock handles printing, mailing via USPS, and queues your front desk for follow-up calls...
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Delightfully easy direct mail marketing. A DIY direct mail tool created for marketing and growth teams. Design, mail & track personalized direct mail postcards and letters. Digital marketers use Mailjoy to send data-driven mail campaigns.
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A simple API to integrate print & mail solutions into your applications.
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Transform your Offline Communications. Use our fully-documented REST API to send personalized letters, checks, postcards and improve address accuracy.
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