Mini Katana Activates AWOL Email Subscribers with PostPilot 

In just three years, Mini Katana has become an eCommerce legend. 

The replica Japanese sword brand, founded by Isaac Medeiros, is already close to $10 million in revenue. Even more impressive: Its growth has been mostly propelled by its irresistible TikTok and YouTube videos.

“We currently get 300 million to 400 million views a month on our content,” said Medeiros. 

Mini Katana also has smartly built a massive email list from all that traffic so they can continue to market to them. But only a fraction of subscribers are buying. 

The company uses MailMatch, a PostPilot feature that identifies physical addresses based only on email information, to connect with those prospects who have engaged with the brand and not yet purchased. And it’s getting a remarkable 5x ROAS. 

In this case study, we’ll explain how it works, and share the other campaigns that are killing it for Mini Katana. 

The Problem: Keeping Exponential Growth Going 

The first year of its existence, Mini Katana did $2.5 million in sales; the second year it hit nearly $10 million, and it’s on track to continue its incredible growth. 

The brand’s email list has also exploded. In the last six months alone, they’ve added more than 500,000 emails to the list. 

But the conversion rate was below 1%. 

“We're driving so much traffic to the site that's low intent,” Medeiros said. “Because it's all coming from these hundreds of millions of views we're getting organically each month. It's just kind of what we expect." 

Email open rate is low because historically, Mini Katana’s messages were dominated by drops and sales, not the entertainment that drew people in the first place. 

The Promise: Postcards Reach People Who Don’t Open Email

To juice growth, Mini Katana decided to press on a number of levers and see what yielded results. They included Amazon, paid, and direct mail. 

Mini Katana used PostPilot to test a winback campaign that was sent to customers who had ordered three times in the past, but hadn’t purchased in more than three to six months.  

It’s getting Mini Katana a 9x ROAS. 

“It had such good results that we decided to automate it and do another round of winbacks,” Medeiros said. 

Having proven the power of postcards to reach email ignorers, he decided to try MailMatch. 

The Postcard: Turning Email Subscribers into Customers 

When someone subscribes to Mini Katana’s email list, PostPilot’s proprietary feature matches that email address to a postal address and drops them a postcard. 

The card has some dramatic flair, in keeping with the brand. It includes a discount code to entice recipients to make a purchase. 

PostPilot turned the campaign around at warp speed, Medeiros said. 

“It’s all been super easy,” he said. “PostPilot did the first round of designs, we gave them to our team and sent them back the same day, and it launched.” 

“We're very constrained with manpower right now,” Medeiros said. “The white-glove service makes it so much easier to execute. It wasn’t just the design but the segmentation and the strategy. All I have to do is go, Does this make sense? Great, let’s go.” 

Looking at the data for received cards (not the ones that have been mailed in the past week or so), the ongoing campaign continues to generate a 5x-plus ROAS. 

The Postscript

Mini Katana is leveraging direct mail throughout its marketing funnel, from prospecting to abandoned cart to winbacks. The abandoned cart campaign consistently achieves a ROAS of 8.3x. 

For Black Friday this year, the brand is planning an exciting new effort: a Cardalog, using it as a gift guide. 

The team has learned from checkout questions that 40% of its customers are buying a sword for someone else. They’re leaning into gifting, and are considering creating Cardalog gift guides around Father’s Day and even customer birthdays.  

“I think they’ll do really well for us,” Medeiros said. “Given our track record with PostPilot, I’m sure they will.” 

Next Case Study

GOOD AMERICAN Makes the Switch to Full-Funnel Revenue with Direct Mail

The body-positive apparel brand switched to PostPilot to improve performance and unlock a full-funnel channel.

KURU Footwear Notches $2m+ with Full-Funnel Direct Mail

In their first year with PostPilot, the foot pain fighters drove 7 figures in revenue at a 10x+ ROI.

Taylor Stitch Automates Retention and Revenue with PostPilot

The responsible shirting brand has driven 7 figures in seasonal and programmatic revenue using direct mail.

HexClad Built a 7-Figure Programmatic Direct Mail Program with PostPilot

The cookware experts drove nearly $3M over BFCM and continue to expand their evergreen direct mail strategies.

Direct Mail Is “Instrumental” in Driving Repeat Purchases for M&S Meats

PostPilot helped the 80-year-old premium jerky brand increase YoY holiday revenue by 110%.

Gozney Retargets & Converts Anonymous Website Visitors with Direct Mail

The outdoor pizza oven brand drove $100k+ in revenue and a 10X+ ROAS acquiring new customers with SiteMatch.

Plum Deluxe Scales Handwritten Birthday Wishes with PostPilot

The community-powered gourmet tea brand adds a personal touch (at scale) for thousands of customers with PostPilot.

Bones Coffee Sees “Explosive” Results with Postcards

With their first two mailers, the company drove nearly $100k in sales and brought thousands of customers back into the fold.

How Direct Mail Became an Essential Marketing Channel for Dr. Squatch

The rocketship CPG brand chose PostPilot for its concierge service and superior analytics.

Pourri Smashed Its Black Friday Goals with PostPilot

Direct mail gave the home fragrances brand a 10% incremental revenue boost, outperforming every other channel.

WINPRO Pet Uses Direct Mail to Reach *All* Its Customers

The pet supplements brand knows that direct mail connects when email can’t.

Cardalogs: A New Acquisition Channel for Misook

The women’s fashion brand tried prospecting with a faster, more flexible alternative to catalogs. It got a 3.4x ROAS.

How HexClad Uses PostPilot to Convert Email Subscribers

The cookware brand’s direct mail campaign helped rack up $800k in sales from new customers.

Wine by Lamborghini Wins at Retention with PostPilot

Holiday campaigns and automated flows keep luxury customers coming back—generating more than 10x ROAS. 

Caden Lane Leans Into PostPilot for Cold Prospecting

Direct mail scored the stylish and fast-growing baby brand a 3.8x ROAS on a first-touchpoint campaign.

Rock City Lab Reactivates Subscribers with Postcards

The ecommerce marketing agency uses direct mail to bring lapsed subscribers back — at 7X the rate of organic reactivation.

Laird Superfood Supercharges Retention With Postcards

Laird Hamilton’s plant-based food brand reengaged thousands of lapsed VIPs and saw 12x ROAS on a single campaign.

Obvi Drives Profits with Automated Postcard Campaigns

The rocketship supplements brand wanted to offset high ad costs and reach dormant customers. They scored 1000%+ ROIs.

Ezra Firestone's BOOM! Achieved a 2600% ROI with Postcards

Ecom legend Ezra Firestone knows how to retain customers. Get his direct mail playbook to drive retention and profits.

Dr. Brandt Uses Postcards to Reach Lapsed Customers

The popular skincare brand relies on PostPilot to mitigate the high cost of online ads and email deliverability issues.

Grande Cosmetics Keeps VIPs Coming Back with Direct Mail

The cult beauty brand generated more than $276,000 from a single postcard campaign. Now, it’s going deeper.

Beardbrand Wins Back “Unreachable” Customers with Easy, Effective Postcards

The OG mens grooming brand needed a way to reach and reactivate top customers who didn't engage with email. They got buyers back and achieved a 10X return.

Promix Nutrition Uses Postcards to Get Into Customers’ Homes

Promix founder Albert Matheny was looking for more than ROI. He wanted to connect offline for stronger recognition, affinity, and credibility.

Orbit Baby Uses Postcards to Acquire High-AOV Customers

With MailMatch™, the DTC stroller brand could send direct mail based just on the emails of high-intent shoppers.

CYSM Hyper-Personalizes 100+ Direct Mail Campaigns

The shapewear brand uses direct mail for holidays, retention, VIP rewards, and more to Drive >10X ROAS.

Bulletproof Re-Engages Customers with Direct Mail + Email

Bulletproof solved the one-time-buyer problem by converting massive second-purchases and new subscribers.

Urbani Truffles Wins Back High-Value Customers with Postcards

Urbani used postcards to win back valuable customers they couldn’t reach online, and how they’re now integrating direct mail across their marketing strategy.

Oh!mino Uses Postcards to Get 60% of Customers Coming Back

CEO & founder Michael Maynard used automated direct mail to help lift reorder rates from 24% to 63%.

Privy CEO Ben Jabbawy on Driving 6% of Revenue with Postcards

Ben speaks with Jeremy Roberts, CMO of apparel brand Tradlands, on making direct mail a leading overall revenue channel.

Postcards Outperformed Email 18.5 to 1 for Morris 4X4

Studies show customers receiving direct mail marketing are more likely to spend more over time (higher LTV). Morris 4x4 put this theory to the test and the results were remarkable.

ATH Organics is Crushing ROI with Postcards

The supplements brand tests creative, offers, and personalization to optimize its direct mail campaigns.

Drag &
Scroll

Ready to increase your revenue?

Join thousands of ecommerce brands using PostPilot to acquire more customers & keep them coming back again (and again).

Try it risk-free
5.0 Shopify Rating

No contracts. No minimums.