PostKnock — best for postcards plus phone follow-up
Our pick (and yes, it's us)
PostKnock is a self-serve direct-mail tool built specifically for small service businesses — dental, optometry, HVAC, chiropractic, med spa, veterinary and 50+ other verticals. You upload a CSV, pick an industry playbook, preview a proof, and launch. Postcards come in 4×6, 6×9 and 6×11, with printing and USPS First-Class postage rolled into the per-piece price, plus EDDM-style saturation mailing when you want a whole route instead of a list.
The differentiator is the second touch: a built-in Call Queue (a Pro feature) gives your front desk a daily list of who to call, with the right per-wave script, timed to when each postcard landed. Postcard plus phone call is the one-two punch most direct-mail tools leave out. You also get QR-code tracking, an in-app postcard Design Studio, and multi-touch wave sequences (up to 5 waves).
Pricing: a genuinely free tier (no credit card, no minimum, no time limit) at roughly $1.05 per 4×6 card, and Pro at $99/mo or $799/yr dropping cards to about $0.79 and unlocking the Call Queue and multi-wave sequencing. You pay per piece from a wallet — no campaign minimums.
Honest caveat: PostKnock does not have native CRM/PMS integrations — you bring contacts in by exporting a CSV from your other system and importing it (the wizard auto-maps columns). There's no email channel and no AI feature set. If an API or CRM-triggered automation is non-negotiable, Lob or Postalytics will fit better.