COMPARISON
PostKnock vs Cactus Mailing
Cactus Mailing is a full-service direct mail agency — their team handles the design, list, printing, and mailing for you. PostKnock is the DIY alternative: design your own postcard in a visual editor, send as few or as many as you like, see pricing on the website, and never schedule a sales call. Same goal, very different setup.
| Feature | PostKnock | Cactus Mailing |
|---|---|---|
| Model | DIY software | Full-service agency |
| How you get started | Sign up online — no sales call | 10-minute consultation to begin |
| Minimum order | None — send 1 or 5,000 | Quote-based; campaigns are scoped during consultation |
| Per-piece pricing | Listed publicly — $1.05 Free, $0.79 Pro (4×6) | Quote-based; request via form or phone |
| Recurring fee | $0 Free / $99/mo Pro | Bundled into each campaign quote |
| Design control | Visual editor — you design it | Their in-house design team |
| Time to first launch | Same day — minutes to set up | ~3–4 day design review + 7–14 day delivery |
| Phone follow-up calls | ✓ Built-in (Pro) | Not part of their service |
| Multi-wave sequences | ✓ Configurable in-app | Ongoing monthly campaigns (managed) |
| Industry playbooks | ✓ Pre-built for 25+ industries | Custom-designed per client |
| AI background images | ✓ 10/mo Free, 50/mo Pro | Not advertised |
| Cancel anytime | ✓ No contracts | Per campaign quote |
Cactus Mailing details summarized from cactusmailing.com at time of publish. Their service model is full-service with quote-based pricing — check their site for the latest.
No sales call. No minimum. Send your first postcard the same day.
Why owner-operators pick PostKnock as their starting point
Try it without a sales call. Cactus Mailing's flow starts with a consultation — a 10-minute call with their team, then design reviews, then quoting. That's a great fit if you want an agency to run things for you. If you'd rather sign up tonight, design a postcard, and send a small batch this week, PostKnock skips that whole runway.
See the price before you buy. PostKnock's per-piece prices live on the website: $1.05 on Free, $0.79 on Pro (4×6). One recurring fee — $99/mo for Pro, $0 for Free. Cactus quotes are custom and depend on the conversation. Both approaches work; PostKnock is for the owner who'd rather just see the number.
Send 1 postcard or 5,000. PostKnock has no minimum. That's the whole point of the experiment-first approach — mail 50 cards to your top reactivation list and see what comes back before you commit to a larger run. Full-service agencies typically scope campaigns at a meaningful scale because that's what makes their design and production team economical.
Design it yourself in a visual editor. Drag-and-drop, brand kit, AI-generated background images, instant proof previews. No designer interview, no 3–4 day review cycle. If you've never designed a postcard before, our industry templates do the heavy lifting — you mostly just type your offer.
One simple Pro fee, then per-piece. Pro is $99/mo (or $799/year) — that unlocks multi-wave sequences and phone follow-up calls. Everything else is per-piece. No campaign-by-campaign quoting, no design hours, no setup fees.
When Cactus Mailing is the right call
Cactus Mailing is a great fit if you want a fully managed direct mail experience. You talk to their team, they recommend an approach, their in-house designers build your postcard from scratch, their team handles the list and printing, and your campaign goes out. If you have the budget for an agency relationship and you'd rather hand the whole project off, that's a totally reasonable way to do direct mail — and Cactus has been doing it for years across 40+ industries.
When PostKnock is the right call
PostKnock is for the owner-operator who'd rather control the project themselves. You want to upload your reactivation list and see the postcard before bedtime. You want to test a 50-card pilot before going bigger. You want one transparent monthly fee plus per-piece pricing — no quotes, no design hours, no contracts. And when you're ready, you want phone follow-up calls and multi-wave sequences in the same tool, not as add-ons.
Pricing side-by-side
Cactus Mailing doesn't publish pricing — each campaign is quoted after a consultation, and the bundle (design hours, list, printing, postage) is folded into one all-inclusive number. That works if you value a single point-of-contact.
PostKnock's pricing is on the website. Free: $0/month, $1.05/card (4×6), no minimum, no card required to sign up. Pro: $99/month (or $799/year), $0.79/card (4×6), with phone follow-ups and multi-wave sequences included.
The structure that helps owner-operators most: one small recurring fee and per-piece-only-when-you-send. If you mail nothing in a month, Pro is your only cost. If you mail thousands, your spend scales with your sending — no surprise quotes.
Trying PostKnock alongside an agency
You can keep your Cactus relationship and try PostKnock for a small pilot — it's how a lot of owners decide which model fits them long-term:
- Sign up for PostKnock (free, no credit card, no sales call)
- Upload a small list (50–200 contacts) and pick an industry playbook
- Customize in the visual editor, preview the print proof, and launch
- Compare results to your Cactus campaign and decide what fits your business
Frequently Asked Questions
What's the main difference between PostKnock and Cactus Mailing?▼
Cactus Mailing is a full-service agency — their team designs, lists, prints, and mails for you, with quote-based pricing. PostKnock is DIY software — you design in a visual editor, see prices on the website, and send as few or as many postcards as you like with no minimums and no sales call.
Can I design my own postcard in PostKnock?▼
Yes. The PostKnock visual editor includes industry templates, brand kit support, drag-and-drop layout, AI-generated background images, and an instant proof preview so you can see exactly what gets mailed. No designer required.
What's the minimum order at PostKnock?▼
There isn't one. You can send a single postcard or several thousand. Most owner-operators start with a small pilot list to see how things land before committing to a larger run.
How does PostKnock pricing work compared to a Cactus Mailing quote?▼
PostKnock has one recurring fee (Free $0/mo or Pro $99/mo) plus per-piece pricing that's published on the pricing page. Cactus Mailing bundles design, list, and printing into a per-campaign quote you receive after a consultation. Both approaches have their fans — PostKnock fits owners who'd rather see the cost up front and pay only when they send.