Klaviyo Email Marketing Agency

We run your email and SMS, and it pays for itself.

We handle the whole channel so you can get back to growing your brand. You spend 30 minutes a week to approve content. We do everything else, and we make you money doing it.

How our services work

Trusted by 75+ brands

THE PROBLEM

You're not struggling. You're under-optimised.

Your retention problem doesn’t look like a problem. Email runs. Campaigns go out. Revenue comes in. But somewhere underneath, the numbers tell a different story.

Repeat purchase rate is flat. LTV isn’t moving. Cross-sell is reactive instead of designed. Every customer is being spoken to the same way: one campaign, one welcome flow, one strategy broadcast to the entire list.

If your emails feel like they’ve plateaued, get in touch.

THE FIX

We don't just send emails. We engineer retention 
with data.

Retention Engineering starts at the data layer. We map which customers buy Product B after Product A. We learn who converts to a second order in 30 days versus 90 — and why. We identify which segments will reorder, which will lapse, which become VIPs, which need reactivating — and we build the entire system around that intelligence.

Every customer segment gets a distinct strategic approach 
every month.

Image 3

01

A customer who places a second order within 30 days is significantly more likely to become a long-term repeat buyer. Compress that window and you compound LTV.

02

Customers brought back through behaviour-triggered reactivation flows spend meaningfully more over the following 12 months than those reactivated through generic campaigns.

03

LTV moves on small structural changes — a few percentage points of repeat purchase rate at $1M+/month is seven figures of additional revenue per year.

HOW WE WORK

The strategy is the work.
The execution fits how you already work.

WITH IN-HOUSE CREATIVE

If you have your own creative team in house, you do NOT need to use ours.

You direct.
We engineer.

We own the strategy

Segment map, send calendar, messaging priorities — all defined by us.

Your team executes

Campaigns and flows built under our direction. Your brand voice, intact.

Zero disruption to workflow

We plug into how you already work. No restructuring required.

without in-house creative team

If you have your own creative team in house, you do NOT need to use ours.

We handle everything.
You approve.

End-to-end delivery

Strategy, copy, design, and deployment — all from our team.

Brand voice built from your data

Developed from customer behaviour, not guesswork or templates.

Same outcome, either way

The strategic result is identical. The model adapts to you.

Either model produces the same result. The difference is operational, not strategic.

Focused retention work.
Building since 2022.

Built from the ground up on client results.

Founded from scratch — no investment, no acquisitions
0
Shopify brands served
0 +
Average client tenure
0 years
Nate Bower Fitness
Örlö
Hatching Time
Twenty

Awards & Certificates

awards
partners

As Seen In

2
1

CASE STUDIES

Real brands. Real numbers. Real retention work.

What compounding retention looks like in practice — engineered, measured, repeatable.

VILROS

ELECTRONICS

Revenue from email + SMS
0 %

From 1% to 26% of total revenue from email and SMS in 30 days. $101,000 in additional revenue in the first month — engineered through behaviour-triggered flows, and 100,000+ subscribers reactivated from a dormant list.

BLUE HORIZON

HEALTH & WELLNESS

From email + SMS in 2025
£ 0 k

Over £950k generated from email and SMS in 2025. Built on rebuilt deliverability, structured non-purchaser conversion, and engineered lifecycle architecture.

DR. SHIBA

Pet supplements

Total revenue from email
0 %

From 20% to 42% of total revenue from email in 90 days. Consistently above 35% for the following 18 months. Engineered by restructuring email to focus on customer behaviour, and replacing discount dependency with value-led messaging.

CLIENT TESTIMONIALS

Real experiences working 
with Shawfire

Founders and operators who’ve worked with us, in their own words.

REAL CLIENT EMAIL WORK

The work behind the numbers.

Email and SMS campaigns
built for behaviour, not broadcast.

JACK SHAW BUILDS

How we think about retention.

Jack Shaw publishes weekly on YouTube about retention, customer psychology, and what it actually takes to build serious eCommerce brands properly.

CLIENT TESTIMONIALS

Real reviews from our partners

Posted on Google Google
Nima Moghaddasi profile picture
Nima Moghaddasi
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Shawfire took my brands from no email/sms presence to consistently generating 15%+ of our revenue from email/sms. Great strategies for flows and campaigns to maximize CVR and LTV. Great email designs. Great team to work with.
Posted on Google Google
Zachary Strong profile picture
Zachary Strong
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Working with Shawfire has consistently been a great experience. They have helped our company with email calendars, email design, automated emails, and list health. It's been great seeing their team help us bring our brand to life in ways that customers enjoy.
Posted on Google Google
Eliam Puente profile picture
Eliam Puente
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Their service and experience are very good. Day-to-day communication was excellent and everything was done in a timely manner. Recommended!
Posted on Google Google
Jay Vasantharajah profile picture
Jay Vasantharajah
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Have been working Jack for over a year now and am very impressed with the results. The quality of the email copy is excellent, but more importantly, it converts! Jack and his team are very responsive, provide us great insights on our email marketing campaigns, and take time to learn our business and communicate ideas to us. Highly recommend Jack & Shawfire Media to manage your email marketing campaigns!
Posted on Google Google
rebecca james profile picture
rebecca james
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
We’ve had a really positive experience working with Shawfire media. The team are lovely to deal with, communication is always easy and we’ve built a great rapport with them. They understand our brand well and consistently produce creative, professional email campaigns that fit what we’re looking for. They’re responsive, approachable and make the whole process very straightforward. Would definitely recommend!
Posted on Google Google
Shielda Fahreisa profile picture
Shielda Fahreisa
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
We've been working with Shawfire and Jack for over a year now, and they continue to impress. They are consistently reliable and always capable of leading our creative output with fresh, high-impact ideas. Love working with them!
Posted on Google Google
Joseph Rigby profile picture
Joseph Rigby
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
What a refreshing experience talking to Jack was! I hopped on a call with him to discuss email marketing, and his authenticity shone through immediately. He took the time to understand my situation and then honestly explained that his services weren't what I needed right now. That level of genuineness builds instant trust. If you're looking for someone who is not just skilled at what they do, but is also a truly good and honest person, Jack should definitley be your first port of call
Posted on Google Google
dusan kloc profile picture
dusan kloc
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
We have worked with Jack for close to a year now and he has helped our backend generate consistent 20%+ revenue via his email flows and management. His expertise in email marketing has significantly improved our engagement rates and boosted conversions. Would highly recommend Jack to any ecom business.
Posted on Google Google
Asher klein profile picture
Asher klein
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Shawfire media does an amazing job with our email campaigns .
Posted on Google Google
Michael Melnick profile picture
Michael Melnick
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Jack Shaw has been an invaluable asset in managing the email marketing channel for our direct-to-consumer business, The Good Chocolate. His expertise with the Klaviyo platform is top-notch. Under Jack's guidance, we've been able to implement highly effective email automation sequences and flows tailored to different customer segments. This level of personalization has significantly improved our engagement, conversions, and gotten us to an unprecedented 95% deliverability score. What truly sets Jack apart is his exceptional project management ability and responsible approach. He works diligently to keep every campaign and initiative running smoothly, updating us regularly and proactively solving any issues. Jack takes full ownership, ensuring all deployments occur without a hitch and tight deadlines are met. Jack's strategic thinking ensures our messaging stays on-brand while incorporating tactics to boost performance metrics. His focused efforts to optimize and streamline our email operations have paid enormous dividends. Above all, Jack is a consummate professional - thoughtful, committed to driving results, and an integral part of making our email marketing a success. I wholeheartedly recommend Jack for any company looking to level-up their email initiatives.

READY TO GROW?

If retention isn't compounding the way it should — let's talk.

Discovery calls are diagnostic. We’ll look at where retention is leaking, what it’s costing you, and whether we’re the right fit.

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