“Gavin and the team have turned our email CRM into a profitable growth engine and source of new prospective customers. Creatively spot on, efficient and really easy to deal with.”
Shawn Beck
Skinny Fizz
Klaviyo Email & SMS Specialists
Turn your email list into your best-performing sales channel
In-box builds revenue-driving email and SMS programs for ecommerce brands: data-led strategy, on-brand creative, and automations that sell while you sleep. We work with brands worldwide.
Trusted by ecommerce brands across the world
Video reviews
What our customers are saying
Hear it straight from the founders we work with.
Email designs
Email designs your customers actually want to open
On-brand campaigns and flows we design for ecommerce brands, crafted to look beautiful in the inbox and built to drive revenue.
Case studies
Real results, on camera
Michael Gabriels
Liquified RV
Scott Hawaii
Brands that trust In-box
By the numbers
The numbers our clients see
0.0%
average open rate
vs 39.7% industry average
0.00%
average click rate
vs 1.47% industry average
$0.00
revenue per recipient
vs $0.11 industry average
The opportunity
Your most profitable channel is the one you already own
Ad costs keep climbing and every click gets more expensive. Meanwhile the list you've already built, your subscribers, is the one audience you own outright.
Most ecommerce brands leave 20-40% of potential revenue sitting unopened in the inbox. In-box turns that list into a predictable, compounding revenue engine with email and SMS that actually gets read, clicked, and bought from.
What we do
Six ways we grow your email revenue
Whether you need a full retention program or a single piece of the puzzle, we plug in where it counts.
01
Email Campaigns
Data-led, beautifully designed campaigns that land, get opened, and convert: planned around a calendar built for your brand.
02
Email Automations (Flows)
Welcome, abandoned cart, post-purchase, win-back: always-on flows that drive revenue 24/7 across the lifecycle.
03
Sign-Up Forms & List Growth
Zero-party-data capture that grows your list and tells you who your subscribers really are.
04
SMS Marketing
Direct, high-cut-through texts that reach customers where they're most engaged and drive instant action.
05
Klaviyo Set-Up & Migration
New to Klaviyo or moving from Mailchimp? We handle migration, integrations and set-up end to end.
06
Account Audit
A deep dive into your account to find the revenue and deliverability you're leaving on the table.
Why In-box
Why brands choose In-box
Data-driven
Every decision backed by your numbers, not guesswork.
Relationship-driven
We build programs your subscribers actually want to open.
Klaviyo specialists
Deep platform expertise; we live in the tool every day.
Founder-led
You work with experts, not account managers reading a script.
Crystal-clear reporting
Video walkthroughs of your data, so you always know what's working.
AI-assisted
We build AI into every step, from research and copy to reporting, so your program moves faster and gets smarter over time.
How we compare
The In-box difference
In-house
Generalist agency
In-boxWinner
Email/SMS expertise
Limited, stretched thin
Generalists across many channels
Klaviyo email & SMS specialists
Strategy
Reactive, ad-hoc
One-size-fits-all
Data-led, tailored to your brand
Creative
Whoever's free
Templated
On-brand, conversion-first
Reporting
Buried in the platform
Spreadsheet dump
Plain-English video walkthroughs
Who you deal with
You do it all
An account manager
The founder and his team
Meet the founder
Led by Gavin Hewitson
In-box started in an unlikely place. Gavin spent five years as a touring stand-up comedian before a side gig in email marketing turned into something bigger. Today he leads a team of fifteen full-time members, helping ecommerce brands around the world turn email and SMS into a serious revenue channel. The same instinct for holding an audience's attention, just pointed at the inbox.
He shares the same strategies he uses for clients on the In-box YouTube channel, so you always know the thinking behind your account.
FAQ
Frequently asked questions
Reviews
What our clients say
“Bringing In-box onboard was a great decision. We saw a big increase in sales. They improved our flows, dialled in our campaigns and helped us gain a big advantage in the market.”
Richard Tourino
Good & Fugly
“Gavin is super talented, focused, efficient and effective. We're already seeing significant lifts in sales and all key metrics.”
Alistair Kirk
Beach Booch
“Gavin and the In-box team are experts in email marketing. They have exceeded expectations in their management of our email flows.”
Peter Maddison
Kids Posters
“Very impressed with his knowledge, organisation, communication, responsiveness, and efficiency. 5 stars all around.”
Kathy Cane
Canes Deer Velvet
“In-box exceeded all expectations. Communication was prompt and concise, the delivery looked slick, and we loved the video reports.”
Berrin Moody
Baxters Original
“Gavin and the team have turned our email CRM into a profitable growth engine and source of new prospective customers. Creatively spot on, efficient and really easy to deal with.”
Shawn Beck
Skinny Fizz
“Bringing In-box onboard was a great decision. We saw a big increase in sales. They improved our flows, dialled in our campaigns and helped us gain a big advantage in the market.”
Richard Tourino
Good & Fugly
“Gavin is super talented, focused, efficient and effective. We're already seeing significant lifts in sales and all key metrics.”
Alistair Kirk
Beach Booch
“Gavin and the In-box team are experts in email marketing. They have exceeded expectations in their management of our email flows.”
Peter Maddison
Kids Posters
“Very impressed with his knowledge, organisation, communication, responsiveness, and efficiency. 5 stars all around.”
Kathy Cane
Canes Deer Velvet
“In-box exceeded all expectations. Communication was prompt and concise, the delivery looked slick, and we loved the video reports.”
Berrin Moody
Baxters Original
Let's talk
Ready to grow your email revenue?
Book a free audit and we'll show you exactly where the revenue is hiding.
$1k+ value · no obligation · 24 hr turnaround