Email & SMS Marketing Agency
FOR BRANDS BUILT DIFFERENTLY
Letterbox helps founder-led, family-owned and women-owned ecommerce brands grow through strategic email marketing, SMS and Klaviyo automation designed to bring customers back.
CURRENTLY ACCEPTING 1 NEW CLIENT FOR Q4 2026
WHAT HAPPENS WHEN WE GET INVOLVED
1,900%
Email revenue growth · children's furniture · 5 months
£30.6K
Email revenue · food brand · 6 months
3×
Email revenue · luxury pet brand · 90 days
1,741%
Subscriber growth · sustainable fashion brand
Email is the only channel where your brand speaks directly, without algorithm interference, to someone who chose to hear from you.
WHY LETTERBOX MEDIA
Most agencies spend it on discount codes and abandoned-cart nudges.
We don't. We treat every email strategy as a body of work — something that accumulates meaning over time, that sounds like you, that customers actually look forward to opening.
That's why we keep our roster small. We don't hand you off to a project manager who doesn't care. You work directly with our Founder.
WHAT WE'RE GOOD AT
Email marketing, SMS marketing, and every retention lever in between
Email Marketing
Campaigns people actually open, not delete on sight. We take this personally.
Email Automation & Flows
Built once, obsessed over forever, working while you sleep.
Omnichannel Strategy
Email, SMS, WhatsApp, Socials, Reviews, RCS actually talking to each other, not stepping on each other's lines.
SMS Marketing
Texts that don't make people regret giving you their number.
Retention Marketing
Keeping customers around so you're not paying twice to acquire the same customers.
Copy & Brand Voice
Marketing that sounds like your brand, not like a template with your logo pasted on.
Turn Website Visitors Into Loyal Customers
Make your brand impossible to ignore.
Leverage Email Automations
Imagine your brand as a well-tuned orchestra, each note carefully placed to create a seamless melody. Our email automations ensure that every message, every touchpoint, happens at just the right moment, turning prospects into loyal customers, effortlessly.
Stand Out In Inboxes With Branded Email Campaigns
Remember the joy of receiving a handwritten letter, crafted just for you? That’s the experience we recreate with our custom email campaigns. Tailored to resonate with your audience, each email campaign we design feels personal, intentional, and full of purpose.
Reach Out Quickly With SMS
In a world of noise, a simple text can be as powerful as a whisper in a quiet room. Our SMS marketing service cuts through the clutter, delivering timely, impactful messages that build connections and drive action, all with the familiarity of a trusted conversation. Pair it with our email marketing solutions, and you’ll have the perfect recipe for building real connections with your customers.
Trusted by Global E-Commerce and DTC Brands
"I have a social enterprise with very specific needs, it is quite a complex business. Letterbox Media worked with me on our Klaviyo flows. I thought at first that it would be just technical advice for best practice, but it was FAR more. They helped us with brand messaging, graphic assets and their copy was much better than ours! The flows have been incredibly successful for us. I cannot recommend Letterbox Media highly enough and will be doing more projects with them."
Kelly B., Founder
Nice Words By People Who Pay Us
More Proof Of Our Awesome Work
Don't Know Where To Begin?
Talk To Our Email Experts
30 min
100 Singapore dollars
1 hr
499 Singapore dollars
