Email and SMS marketing are no longer optional for ecommerce brands—they’re lifelines. And when it comes to combining automation, segmentation, and personalization, Klaviyo is the platform everyone’s talking about.

But here’s the truth: having Klaviyo doesn’t guarantee success. It’s like owning a Ferrari without knowing how to drive stick. That’s where a Klaviyo marketing agency makes the difference. These agencies are specialists who fine-tune your account, design winning strategies, and ensure every email and text message generates revenue.

In this guide, we’ll break down everything you need to know about hiring a Klaviyo marketing agency, what they do, why they matter, and how they can transform your ecommerce growth in 2025.

What is a Klaviyo Marketing Agency?

A Klaviyo marketing agency is a specialized digital partner that focuses exclusively on leveraging Klaviyo for ecommerce success. Unlike general marketing agencies, they don’t try to juggle a dozen platforms—they live and breathe Klaviyo.

These agencies typically help with:

  • Account setup and migration

  • Email & SMS automation flows

  • List growth and lead capture

  • Creative design and copywriting

  • Deliverability management

  • Performance optimization and reporting

Why Work With a Klaviyo Marketing Agency?

1. They Bring Expertise You Don’t Have

Learning Klaviyo by yourself is time-consuming. Agencies have done it hundreds of times, which means fewer mistakes and faster results.

2. They Maximize Your ROI

Instead of sending random campaigns, agencies build automation systems that generate 30–50% of your email revenue passively.

3. They Protect Your Sender Reputation

Poor deliverability means your emails land in spam. Agencies know how to warm up domains, clean lists, and keep you in the inbox.

4. They Free Up Your Time

Your team can focus on products and customers, while the agency handles the tech, creative, and strategy.

Core Services of a Klaviyo Marketing Agency

Account Setup & Migration

  • Seamless transfer from Mailchimp, Omnisend, or other tools

  • Import of clean lists and purchase history

  • Setup of domain authentication (SPF, DKIM, DMARC)

Email Automation

  • Welcome flows to turn subscribers into buyers

  • Abandoned cart and checkout flows to recover lost sales

  • Post-purchase and loyalty flows to keep customers coming back

  • Re-engagement campaigns to win back at-risk subscribers

Campaign Strategy & Execution

  • Monthly campaign calendars

  • Creative templates tailored to your brand

  • Split testing for subject lines, content, and CTAs

List Building & Growth

  • Optimized pop-ups and signup forms

  • Incentives like discounts, loyalty points, or giveaways

  • SMS + email capture for omnichannel reach

Reporting & Optimization

  • Revenue tracking by campaign and flow

  • Deliverability and engagement monitoring

  • Continuous testing for higher conversion rates

How a Klaviyo Marketing Agency Helps Ecommerce Brands Scale

Smarter Segmentation

Instead of blasting the same message to everyone, agencies create precise segments based on:

  • Purchase behavior

  • Customer lifetime value

  • Engagement frequency

  • Browsing activity

Better Creative

Email design isn’t just about pretty templates. Agencies craft emails that:

  • Look professional on mobile and desktop

  • Use persuasive copy that converts

  • Have strong, clickable CTAs

Revenue Tracking

Agencies know the metrics that matter:

  • Revenue per recipient

  • Flow-generated revenue

  • Click-to-purchase rates

  • ROI per campaign

Benefits of Hiring a Klaviyo Marketing Agency

  • Get results faster than DIY

  • Increase your email-driven revenue share

  • Avoid spam-folder disasters

  • Gain access to expert designers, writers, and strategists

  • Scale SMS marketing alongside email

When Should You Hire a Klaviyo Marketing Agency?

You should consider hiring an agency if:

  • Your current email revenue is underperforming

  • You don’t have the time or skills to manage Klaviyo

  • You’re migrating from another platform

  • You want to expand into SMS marketing

  • You want predictable, measurable ROI from email

Choosing the Right Klaviyo Marketing Agency

1. Look for Official Partnerships

Choose an official Klaviyo Partner (Elite or Master tier if possible).

2. Ask for Case Studies

Check if they’ve delivered results for ecommerce brands like yours.

3. Understand Their Process

Do they offer end-to-end management (strategy, design, deliverability), or just templates?

4. Evaluate Their Pricing

Agencies should be transparent about setup fees and monthly retainers.

How Much Does a Klaviyo Marketing Agency Cost?

  • Setup & Migration: $2,000–$5,000

  • Comprehensive Onboarding: $5,000–$15,000

  • Ongoing Retainers: $2,000–$8,000/month

While the cost may feel high, consider this: even a single abandoned cart flow can generate tens of thousands in yearly revenue, easily covering agency fees.

A 3-Month Timeline With an Agency

Month 1:

  • Migrate data

  • Authenticate domains

  • Launch core flows

Month 2:

  • Launch first campaign sequences

  • Optimize signup forms

  • Begin SMS flows

Month 3:

  • Advanced segmentation

  • Testing subject lines, offers, and design

  • Performance scaling

Case Study: Real Results From an Agency

A skincare brand moved from Mailchimp to Klaviyo with the help of a Klaviyo marketing agency. Within 90 days:

  • Flow revenue grew from 12% to 40% of total sales

  • Deliverability improved, boosting open rates by 27%

  • SMS opt-ins increased by 15,000 subscribers in 3 months

Conclusion

Klaviyo is an incredible tool, but like any powerful system, it requires expertise to unlock its full potential. That’s why partnering with a Klaviyo marketing agency is such a smart investment.

From setup and automation to creative and reporting, agencies help brands maximize revenue while avoiding costly mistakes. If you’re ready to scale in 2025, hiring the right Klaviyo marketing agency might just be your growth shortcut.

FAQs

1. What makes a Klaviyo marketing agency different from a general agency?

They specialize exclusively in Klaviyo, bringing deeper expertise in flows, segmentation, and deliverability.

2. Can agencies help with SMS as well as email?

Yes, most agencies integrate SMS marketing alongside email for an omnichannel approach.

3. How long does onboarding usually take?

Most agencies can set up and optimize your account within 4–6 weeks.

4. Do I need an agency if I’m a small store?

If you’re under $500k/year in revenue, DIY may work. But once you’re scaling, an agency delivers far better ROI.

5. What’s the biggest mistake ecommerce brands make with Klaviyo?

Not setting up automation flows properly—missing out on 30–50% of potential email revenue.