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Klaviyo & Mailchimp Certified

Your email list is sitting
on untapped revenue.
We fix that.

Strategy, design, pixel-perfect HTML, and revenue-driving automations — all under one roof. Built exclusively for eCom brands ready to scale with email.

⭐⭐⭐⭐⭐5.0 · 752 reviews on Upwork
+42%
Revenue lift
📈
💌
7,000+
Templates built
10–40%
Average revenue lift for our clients
14 days
Average time to first results
11.7x
Average ROI in first 90 days
2+ years
Average client partnership duration

Trusted by brands across eCommerce, SaaS & Retail

WonderCrunch
PureSport
WhiteningCo
Boyd & Co
SleepDrops
FoxFolk
SkinnyFizz
Williams Warn
Safe-Guard Products
Inaya Nutrition

Works with the platforms you use

Primary focus on Klaviyo. Experience across HubSpot, Mailchimp, ActiveCampaign, Omnisend, and 15+ more platforms.

Klaviyo
Shopify
HubSpot
Mailchimp
Postscript
Attentive
WooCommerce
BigCommerce

You're not buying “email marketing”

You're investing in a revenue engine. Here's what you actually get.

Full Ownership, Zero Headache

No briefing. No follow-ups. No micromanaging. We take complete ownership of your email channel from strategy to execution — you stay focused on growing your business.

Fast Wins, Then Scale

We don't wait for perfection. We launch fast, track what works, and double down on results. You'll see real revenue impact within weeks — not months.

Results or We Walk

We tie our work to your numbers. If the results aren't there, you're free to leave — no lock-in contracts, no fine print, no excuses.

Your Entire Funnel, Covered

From lead capture to post-purchase retention — we connect every touchpoint. Email isn't a standalone tactic here, it's the backbone of your revenue system.

More than an agency:
we're your email team.

Most agencies only do strategy. Most developers only write code.
We deliver the full picture: strategy, design, development and automation under one roof.

01

Design, Dev & Automation Under One Roof

Unlike most email agencies, we handle everything in-house: pixel-perfect HTML, revenue-driving flows, and full automation setup. No handoffs. No miscommunication. Figma to inbox, start to finish.

02

13+ Years, 800+ Projects Delivered

We have built and delivered 800+ projects across every type of email: campaigns, transactional, flows, and full automation series. That depth means fewer mistakes and faster results.

03

Your Email Looks Perfect. Everywhere.

Gmail, Outlook, Apple Mail, Samsung Mail. Your emails will render flawlessly everywhere. We test across 50+ client and device combinations before every send.

04

Revenue-First Approach

Every decision we make, subject lines, flow logic, send timing, is driven by one question: will this make our client more money? Every email we build is designed to make you money.

Stop juggling 3 vendors. We handle it all.

Strategy, design, pixel-perfect code, and automations — all under one roof.
Stop coordinating between your designer, developer, and strategist.

Why Mailrun over everyone else?

Most agencies look the same on paper. Here's what actually separates us.

✓  Mailrun✗  Other Agencies
Dedicated team on your brand every single weekNew face assigned to your account every few months
Strategy built around your revenue goals, not vanity metricsMonthly reports full of open rates that don't move the needle
We only take clients we know we can growWill onboard any brand that swipes a card
Proactive ideas and honest pushback when neededWaiting for your brief before doing anything
Every campaign tied to actual revenue impactClick rates and impressions with no business context
Full-stack execution: copy, design, flows, and strategySiloed specialists who never talk to each other

✓ Good Fit

  • Established brand ready to scale email revenue
  • Values long-term partnership over cheap one-off work
  • Wants a team that thinks, not just executes
  • Open to honest strategy conversations
  • Focused on business growth, not just email metrics

✗ Not a Fit

  • Looking for the cheapest option available
  • Needs results overnight with no strategy budget
  • Wants someone who just says yes to everything
  • Not ready to invest in email as a revenue channel
  • Prefers to micromanage every single email

What our clients actually say.

Brands trust us with their most important channel. Here's what they say.

★★★★★
“Zahidul is one of the best email professionals I've worked with. He handles both design and development end-to-end, delivering polished, production-ready emails every time. Turnaround was fast, communication was excellent, and the quality spoke for itself. We've worked together for 5+ years now.”
🧑‍💼
James R.
Head of Retention, BYD Cars
⭐ Upwork · 5+ years
★★★★★
Our Klaviyo flows went from generating 10% of revenue to over 35% in 3 months. Zahidul knew exactly what to build and why. Highly recommend for any eCommerce brand serious about email.
👩
Sarah T.
CEO, DTC Fashion Brand
⭐ Upwork
★★★★★
Exceptional HTML email developer. Provided Figma to HTML email development with templates that worked perfectly in Outlook, which is notoriously difficult. Fast, professional, and gets it right the first time. Will definitely hire again.
🧔
Marcus L.
Marketing Director, SaaS
⭐ Upwork · Top Review
★★★★★
Set up our entire Klaviyo account from scratch. Every flow, segment, and integration was done perfectly. Our abandoned cart recovery alone paid back the entire project cost in the first week.
👩‍💼
Priya M.
Founder, eCommerce Store
⭐ Upwork

Ready to turn your email list
into your best sales channel?

Let's Talk →

Let's build something
great together.

Whether you need a single template or a full email program overhaul, we'd love to hear about your project. We typically respond within 24 hours.

hello@mailrun.co
Responds within 24 hours
Working with clients globally
Top Rated Plus · 100% Job Success

📅 Prefer to talk first?

Book a free 30-minute discovery call, no commitment, just a quick chat to see if we're a good fit.

Book a Free Discovery Call