COMPARISON
PostKnock vs SendJim
SendJim is a credit-based marketing suite for home service businesses: postcards, handwritten cards, gifts, voicemail drops and SMS, with neighbourhood radius targeting on top. It does more kinds of things than we do. It also starts at $99 a month before you mail anything, and its cheapest per-card rate sits behind a $599/mo plan. PostKnock does one job — postcards and the follow-up calls that turn them into booked work — and its free plan costs nothing per month.
| Feature | PostKnock | SendJim |
|---|---|---|
| Monthly fee to start | $0 — Free plan, no card at signup | $99/mo (Basic) |
| Cheapest per-postcard rate | $0.91 (4×6, Pro at $99/mo) | $0.88/credit — needs the $599/mo Pro plan |
| Per-postcard rate on the entry plan | $1.04 (4×6, Free, $0/mo) | $1.74/credit (Basic, $99/mo) |
| Credits that expire | None — wallet balance never expires | Credits expire after 12 months |
| Phone follow-up calls | ✓ Built-in per wave, with a script and a daily queue | Ringless voicemail drops (0.5 credits) |
| Multi-wave sequences | ✓ Unlimited waves, non-responders advance automatically | ✓ CRM-triggered automations |
| Ready-made playbooks (sequence + timing + call script) | ✓ 156 across 52 verticals | Campaign templates |
| Design Studio: shuffle to a finished card | ✓ 4 style shells × 6 layouts, unlimited reshuffles | Template picker + design service |
| Neighbourhood radius targeting | ✓ ZIP picker with live household counts | ✓ Radius mapping around a job address |
| Gifts, handwritten cards, SMS | ✗ Postcards and calls only | ✓ Its main advantage over us |
| Free plan | ✓ No monthly fee, no expiry, full Design Studio | ✗ Lowest plan is $99/mo |
| Minimum order | None | None |
| Print proof before sending | ✓ Real print files, 4-point sign-off, blocks launch until approved | Proof on request |
SendJim figures read from their published pricing page (members.sendjim.com/pricing) on 18 August 2026 and can change — confirm on their site. A SendJim postcard costs 1–1.75 credits depending on size, so the per-credit rates above are the price of their smallest card. PostKnock figures are our own published prices, printing and postage included.
No monthly fee, no minimum, no time limit, and no card at signup. You fund a wallet before anything mails.
Where PostKnock goes further
The monthly fee arrives before the first postcard does. SendJim's Basic plan is $99/mo and includes zero credits, so a quiet month still costs $99 and every card on top is $1.74. PostKnock's Free plan is $0/mo: you fund a wallet, you're charged $1.04 a card when something actually mails, and an idle month costs nothing.
Their cheapest card needs their most expensive plan. SendJim's $0.88 credit rate is the Pro plan at $599/mo. Reaching it means committing $7,188 a year before postage. PostKnock Pro is $99/mo and drops 4×6 to $0.91 — three cents off their best rate, at a sixth of the subscription.
Credits expire. A wallet doesn't. SendJim credits expire after 12 months, so unused budget is forfeited. PostKnock charges per piece from a wallet balance that never expires. If your season is slow, the money is still there next spring.
It genuinely does more than we do. Gifts, handwritten cards, SMS and voicemail drops are real SendJim features and we have none of them. If your plan is a full multi-channel relationship programme built around your CRM, that is a fair reason to pick them. If your plan is "mail the neighbourhood, then call the ones who don't respond", you're paying a suite price for one channel.
Who is SendJim best for?
SendJim fits a home service business that wants one system for every touch: postcards after a job, a handwritten thank-you, a gift to a top customer, an SMS, a voicemail drop, all triggered from ServiceTitan or Jobber. The radius mapping around a completed job is a genuinely good idea for HVAC, plumbing, roofing and lawn care. If you'll use several of those channels and you're already at a volume where $299/mo disappears into the noise, it's a reasonable buy.
Who is PostKnock best for?
PostKnock fits the same trades when the plan is narrower and the budget is real: mail a sequence, then work the callbacks. Import your customer list, pick a playbook, launch. Wave 1 lands, your phone queue fills with the people it reached, wave 2 goes to whoever didn't respond. No monthly fee to start, no credits to forfeit, and the per-card price is on the pricing page rather than behind a demo.
Pricing comparison
SendJim publishes three plans: Basic $99/mo with no included credits at $1.74/credit, Growth $299/mo with 100 credits at $0.94/credit, and Pro $599/mo with 400 credits at $0.88/credit. A postcard costs 1–1.75 credits by size. PostKnock is $0/mo at $1.04 per 4×6, or $99/mo at $0.91.
Run the same month through both. 500 customers, three waves, 1,500 small postcards: PostKnock Pro is $99 + 1,500 × $0.91 = $1,464, and PostKnock Free is $1,560 with no subscription at all. SendJim Basic is $99 + 1,500 × $1.74 = $2,709; Growth is $299 + 1,400 × $0.94 = $1,615; Pro is $599 + 1,100 × $0.88 = $1,567. PostKnock's free plan comes in under every SendJim tier for that month, and follow-up calling is included in Pro rather than billed as voicemail credits.
Switching from SendJim
Moving from SendJim to PostKnock takes about 5 minutes:
- Export your customer list from your CRM or field-service software as a CSV
- Sign up for PostKnock (free, no credit card required)
- Import the CSV: PostKnock auto-maps name, address and phone columns
- Pick the HVAC, plumbing or landscaping playbook (or design from scratch)
- Approve the print proof and launch your first multi-wave campaign
A worked example: HVAC maintenance reminders
Plug your own numbers in. A contractor with 500 past customers running a 3-wave maintenance-reminder sequence on PostKnock Pro:
- 500 customers × 3 waves = 1,500 postcards at the 4×6 Pro rate of $0.91 = $1,365, plus $99 for the month
- Phone follow-up calls after each wave, included in Pro
- Assume a 4% booking rate → 20 tune-ups booked
- Assume an average tune-up is worth $350
- 20 × $350 = $7,000
The two assumptions above are ours, not measured results: response rate and customer value vary a lot by business, list quality and offer. Swap in your own figures before budgeting off this.
Frequently Asked Questions
On postcards, yes, at every tier we can compare. SendJim's entry plan is $99/mo with cards at $1.74 a credit; its $0.88 rate requires the $599/mo plan. PostKnock's free plan is $0/mo at $1.04 a card and Pro is $99/mo at $0.91. For a 1,500-card month PostKnock Free costs $1,560 against $1,615 on SendJim Growth and $1,567 on SendJim Pro. SendJim does more than postcards, so compare the channels you'll actually use.
Not as a call queue. SendJim offers ringless voicemail drops, billed at 0.5 credits each, which leave a recording without ringing the phone. PostKnock builds a live call into each wave: a script per wave and a daily queue your office works through, timed to when each card lands. A voicemail is a broadcast; a callback is a conversation.
Gifts, handwritten cards and SMS. Those are real features and we have none of them — PostKnock is postcards plus follow-up calls, deliberately. SendJim's radius mapping around a job address is also strong for trades. If you want a full multi-channel programme, that's a fair reason to choose them.