Mail a postcard, then follow up with a phone call. PostKnock turns your list of customers who drifted away into a working pipeline — with pre-built playbooks for 50+ industries.
Start Free — No Credit CardA reactivation postcard is a physical mail piece sent to a customer who hasn't bought, booked, or visited in a while — with one job: get them to come back. It pairs a friendly reminder with a specific reason to return (an offer, a deadline, a "we'd love to see you again").
Lapsed patients, expired members, customers past their usual service interval, one-time buyers who never came back. If you have a list of names and addresses, you can reactivate them.
No envelope to open and nothing to unsubscribe from — the message is visible the moment it hits the mailbox. A postcard lands in a channel your old customers aren't ignoring the way they ignore another marketing email.
Lapsed customers are the cheapest list you'll ever market to — you already earned their trust once. The challenge is reaching people who have tuned out your other channels. Mail (plus a call) cuts through.
Industry studies typically report direct-mail response rates to an existing house list in the low-to-mid single digits (often cited around 3–6%),1 with results varying widely by offer, list quality, and follow-up. Treat any number as an estimate, not a promise — your own list and offer drive the outcome.
Postcards that get attention. Callbacks that close the deal. Here's the whole loop — four steps, no agency.
Choose a pre-built multi-touch wave sequence for your industry (50+ verticals). Wave timing, message direction, UTMs, and call scripts come pre-configured — up to 5 waves. Upload your lapsed-customer list by exporting a CSV from your existing system; the import wizard auto-maps the name, address, and phone columns.
Start from an industry template and edit it in the in-app Design Studio — your logo, your offer, your colors. Choose 4×6, 6×9, or 6×11. Add a QR code that links to your booking page or offer.
Postcards print and ship via USPS First-Class automatically — printing and postage are included in the per-piece price. Send to a targeted list, or run an EDDM-style saturation mailing to a whole neighborhood. You pay from your wallet, per piece, only for what you send.
A few days after delivery, the built-in Call Queue (a Pro feature) fills up with the people who got the card. Your front desk works the queue with the wave's pre-loaded call script and logs each outcome. Non-responders roll forward into the next wave. This postcard-then-phone one-two punch is the part most "just mail it" tools leave out.
Real reactivation postcards, themed per industry and ready to customize in the Design Studio. Here are a few across different verticals — the same postcard + call sequence works for all of them.
Dental
Med Spa
HVAC
Veterinary
Direct mail doesn't have to be a black box. Add a QR code to any reactivation postcard and you can see scans roll in.
Each card carries a QR code linking to your booking page or offer, so a scan is a measurable signal that the card got noticed.
Playbooks set UTM parameters on the destination URL, so the traffic shows up labeled in your own web analytics.
For the people who don't scan, the Call Queue gives your team a second, human touch — and a logged outcome either way.
No credit card, no minimum, no time limit. You only pay when you send — from your wallet, per card.
Single-wave postcard campaigns · Unlimited contacts · From $1.05/piece
Everything in Free + the Call Queue & multi-wave sequences · From $0.79/piece
Per-piece pricing includes printing + USPS First-Class postage. Pro is $99/mo or $799/yr. See full pricing →
The same postcard + call playbook, tuned for your world. A few of the verticals with their own reactivation guide:
3-wave reactivation for patients overdue 12+ months.
View dental reactivation →
Bring back clients whose treatment window has lapsed.
View med spa reactivation →
Re-engage patients who dropped off their care plan.
View chiropractic reactivation →
Win back members whose passes or memberships lapsed.
View yoga reactivation →
It's a postcard sent to a past customer who hasn't bought, booked, or visited recently, with the goal of getting them to return. It usually pairs a friendly reminder with a specific offer and a clear way to respond — like a QR code to your booking page. PostKnock then follows the card with a phone call so the outreach isn't a single touch.
Results vary a lot by list quality and offer, so treat any figure as an estimate. Industry studies typically report direct-mail response rates to an existing house list in the low-to-mid single digits, often cited around 3 to 6 percent. Lapsed customers tend to respond better than cold prospects because they already know you, and adding a phone follow-up gives non-responders a second, human touch.
A few days after a card is delivered, PostKnock's built-in Call Queue (a Pro feature) populates with the people who received it. Your team works the queue using the playbook's pre-loaded call script and logs each outcome. Anyone who doesn't respond rolls forward into the next wave. The calls are made by your own staff — PostKnock organizes the queue and scripts.
They start at $1.05 per 4x6 postcard on the Free plan and drop to $0.79 on Pro, with printing and USPS First-Class postage included in that per-piece price. You pay from your wallet only for what you send — no setup fees, no minimums, no contracts. Pro is $99/mo or $799/yr and adds the Call Queue and multi-wave sequences.
Any service business with a list of past customers. PostKnock ships pre-built playbooks for 50+ industries — dental, med spa, HVAC, optometry, veterinary, chiropractic, physical therapy, gyms and studios, home services, and more. The postcard-plus-call sequence is the same; the timing, messaging direction, and call scripts are tuned per vertical.
Export your inactive customers as a CSV from whatever system you already use, then upload that CSV to PostKnock. The import wizard auto-maps name, address, and phone columns. PostKnock does not connect to or sync with third-party software directly — the flow is a one-time CSV export and import, which you can repeat whenever you refresh the list.
Yes. Each postcard can carry a QR code linking to your booking page or offer, so scans give you a measurable response signal, and playbooks add UTM parameters so the traffic shows up labeled in your own web analytics. Logged call outcomes from the Call Queue tell you how the human follow-up went.
Three sizes: 4x6, 6x9, and 6x11. You design any of them in the in-app Design Studio, starting from an industry template and editing the copy, offer, colors, and logo to match your brand.
Pick a playbook, design a card, mail it, and work the Call Queue. Start free — you only pay when you send.
Start Free — No Credit Card1 Direct-mail response-rate ranges are drawn from general industry benchmarks (e.g. ANA / DMA Response Rate Report coverage). Figures are estimates that vary widely by list, offer, and follow-up — presented here as a range, not a guarantee.