Last Updated: February 2026

PostPilot Review: Why We Recommend It for Customer Re-Engagement

PostPilot is a direct mail automation platform for ecommerce brands, and it's one of the few tools we actively recommend to clients. Not as a replacement for email or SMS — but as the channel that reaches customers when those digital channels have stopped working. In this PostPilot review, we cover exactly where it fits in your retention stack.

We've used PostPilot across multiple brands and seen ROAS range from 2-6x on lower-AOV products to 45x on high-end fashion. The results depend on your average order value and how you use it, but the use case is clear: when a customer has stopped engaging with your emails and texts, a physical postcard in their mailbox can bring them back.

This article covers how PostPilot works, the specific use cases where we've seen it perform, how to integrate it with Klaviyo, and when it makes sense for your brand.

What PostPilot Does

PostPilot automates the process of sending physical postcards to your customers. You design the card, define who gets it (using your Klaviyo segments or Shopify data), and PostPilot handles printing, addressing, and mailing. Cards typically arrive within a week.

The platform integrates with Klaviyo and Shopify, so you can target customers based on purchase history, engagement status, and segment membership — the same data you already use for email and SMS targeting. You can also assign unique discount codes per campaign to track performance accurately.

As of 2026, the cost is approximately $0.67 per postcard, which includes printing and postage. There's no complex pricing tier — you pay per card sent.

Where PostPilot Actually Works

Direct mail isn't right for every situation. Here are the specific use cases where we've seen it deliver real results:

1. Unengaged Customer Re-Engagement

This is probably the strongest use case for PostPilot. You have customers who've purchased before but have completely stopped engaging — they're not opening emails, not clicking SMS, essentially invisible to your digital marketing. Continuing to hit them with more emails and texts isn't going to work. They've tuned you out.

A physical postcard breaks through that noise. It shows up in their mailbox — a completely different channel that they can't ignore or filter. We've seen this bring back customers who hadn't engaged in months. For more on keeping customers before they lapse, see our guide on customer retention strategies.

2. Winback Campaigns for Lapsed Purchasers

Similar to re-engagement but more targeted: customers who bought once (or multiple times) but haven't purchased in a defined window — say 90 or 120 days. They liked your product enough to buy it, but something stopped them from coming back. A personalized postcard with a compelling offer can be the nudge they need.

This is where we've seen the strongest ROAS numbers. One high-end fashion brand we worked with saw 45x ROAS on their winback postcards — though that was driven partly by their high average order value. Even on a lower-AOV snack brand (around $60 AOV), we still saw 2-6x ROAS, which is profitable at $0.67 per card. You can calculate your ROAS to see how direct mail stacks up against your other channels.

3. Abandoned Cart / Checkout Follow-Up

This one is less intuitive but it works. If someone abandons their cart and doesn't convert from your email and SMS abandoned cart flows, you can trigger a postcard as a final touchpoint. The timing needs to be right — you're sending this after the digital sequence has played out, so there's a delay built in. But for high-value carts, it can be worth it.

Use our Flow Builder to map out how PostPilot fits into your existing abandoned cart sequence alongside email and SMS touchpoints.

4. Big Sale Announcements

For major sales events — Black Friday, anniversary sales, seasonal clearance — a postcard can drive awareness beyond your digital channels. This works best as a one-off campaign to a broad segment rather than an automated flow. Send the postcard a few days before the sale starts so it arrives in time to build anticipation.

How to Integrate PostPilot With Klaviyo

PostPilot connects directly with Klaviyo, which is what makes it practical for brands already running their retention marketing there. There are two main ways to use the integration:

Flow-Triggered Sends

You can add PostPilot as a step in your Klaviyo flows. For example, in a winback flow: send email 1, wait 3 days, send email 2, wait 3 days, send SMS, wait 7 days — if they still haven't purchased, trigger a PostPilot postcard. The postcard becomes the last resort in a multi-channel sequence, only firing when the digital touchpoints haven't converted.

This is the most cost-effective approach because you're only sending postcards to people who didn't respond to free (or near-free) email and SMS messages first.

Segment-Synced Campaigns

For one-off campaigns, you can build a segment in Klaviyo — say, customers who purchased in the last year but haven't engaged with any email in 90 days — and sync that segment into PostPilot. Then you trigger a campaign in PostPilot to send those specific people a postcard. Use our Audience Builder to map out the right segments for direct mail targeting.

This approach is great for seasonal campaigns or when you want to reach a specific group of lapsed customers with a targeted offer.

When PostPilot Makes Sense (and When It Doesn't)

PostPilot isn't for every brand. Here's how to think about whether it's worth adding to your marketing stack:

It Makes Sense When:

• You have a significant base of lapsed customers — if you have thousands of customers who bought but haven't engaged in months, PostPilot gives you a way to reach them.
• Your AOV is high enough — at $0.67 per card, the math works better for brands with $80+ AOV. A single conversion covers the cost of sending hundreds of postcards.
• Your email and SMS are already dialed in — PostPilot is a complement, not a substitute. If your email marketing and SMS aren't performing well yet, fix those first.
• You're already using Klaviyo — the integration makes PostPilot practical. Without it, you're manually managing lists and losing the flow-trigger capability.

It Probably Doesn't Make Sense When:

• Your AOV is very low — if your average order is $20-30, the per-card cost eats too much into your margin. The ROAS math gets tight.
• You don't have enough customer data — PostPilot needs physical mailing addresses. If your customer base is mostly anonymous site visitors, you don't have enough to target.
• Your email and SMS aren't set up yet — direct mail should be the third channel, not the first. Get your Klaviyo tracking and flows working before adding PostPilot.

Tips From Running PostPilot Campaigns

A few things we've learned from running PostPilot campaigns across multiple brands:

Use Unique Discount Codes

Always create a discount code specific to each PostPilot campaign. This is the only reliable way to attribute revenue back to the postcard. Without it, you're guessing. A code like COMEBACK15 or MISSYOU20 also reinforces the message on the card itself.

Keep the Design Simple

A postcard isn't a catalog. One product image (or a lifestyle shot), a short message, a clear offer, and a URL or QR code. That's it. The goal is to get them back to your site, not to tell your entire brand story on a 4x6 card.

Use PostPilot as the Last Step, Not the First

Since email and SMS are essentially free compared to $0.67 per postcard, always exhaust your digital touchpoints first. PostPilot should be the final step in a flow — the channel you reach for when everything else has been tried. This keeps your customer acquisition cost down and makes the ROAS math work.

Account for Delivery Time

Postcards take about a week to arrive. For flow-triggered sends, this means building in appropriate delays. For sale announcements, send at least 7-10 days before the sale starts. This is different from email and SMS where delivery is instant — plan accordingly.

Bottom Line

The short version of this PostPilot review: it fills a real gap in ecommerce retention marketing. When customers stop engaging with email and SMS, you need another way to reach them — and a physical postcard in their mailbox is hard to ignore. The Klaviyo integration makes it practical to add to your existing flows without building a separate system.

The key is understanding when to use it: for unengaged customers, winback campaigns, and as a final touchpoint after digital channels haven't converted. At $0.67 per card, the ROI depends on your AOV — high-AOV brands will see dramatic returns, while lower-AOV brands need to be more selective about who they send to.

Get your email and SMS right first. Then add PostPilot as the third channel. For a broader look at building a multi-channel retention strategy, read our guide on mastering direct mail in marketing, or see our case study on a 500% increase in email and SMS revenue.

Frequently Asked Questions

What is PostPilot?

PostPilot is a direct mail automation platform for ecommerce brands. It lets you send personalized postcards triggered by customer behavior — like lapsed purchase windows, abandoned carts, or segment membership — and integrates directly with Klaviyo and Shopify.

How much does PostPilot cost?

As of 2026, PostPilot charges approximately $0.67 per postcard, which includes printing and postage. There's no monthly platform fee for basic usage. The per-card cost means ROI depends heavily on your average order value — high-AOV brands see dramatically better returns.

Does PostPilot integrate with Klaviyo?

Yes. You can trigger PostPilot sends from Klaviyo flows (e.g., send a postcard if a winback email series doesn't convert) or sync Klaviyo segments into PostPilot for one-off campaigns. The integration uses your existing Klaviyo data for targeting.

What kind of ROAS can you expect from PostPilot?

It varies significantly by brand and average order value. We've seen anywhere from 2-6x ROAS for lower-AOV brands (around $60 AOV) to 45x ROAS for high-end fashion and apparel brands. The $0.67 per-card cost means even a single conversion from a batch of postcards can be profitable for higher-AOV products.

When should I use PostPilot vs email or SMS?

PostPilot works best as a complement to email and SMS, not a replacement. Use it when digital channels have stopped working — specifically for unengaged customers who aren't opening emails or clicking SMS, winback campaigns for lapsed purchasers, and as a final touchpoint in abandoned cart sequences after email and SMS haven't converted.