Running an online store isn’t just about selling products—it’s about building relationships. And in today’s digital world, those relationships are often nurtured through email and SMS. That’s where a Klaviyo marketing agency comes in.

Think of it this way: if your ecommerce business is a car, Klaviyo is the engine, and the agency is the expert mechanic who tunes it for peak performance.

In this guide, we’ll dive into everything you need to know about working with a Klaviyo marketing agency—what they do, why they matter, and how they can help your brand grow faster than ever.

What is a Klaviyo Marketing Agency?

A Klaviyo marketing agency specializes in using Klaviyo’s platform to create high-performing email and SMS campaigns for ecommerce brands.

Instead of sending boring newsletters that land in spam, they build automated customer journeys that boost sales, increase retention, and create brand loyalty.

Their expertise covers:

  • Strategy and planning

  • Email/SMS automation

  • Segmentation & personalization

  • Campaign execution

  • Analytics and optimization

Why Choose Klaviyo Over Other Platforms?

Not all email tools are built for ecommerce. Here’s why Klaviyo stands out:

  1. Ecommerce-first integrations – Shopify, WooCommerce, BigCommerce, and more.

  2. Advanced customer segmentation – Target buyers based on behavior, not just demographics.

  3. Revenue attribution tracking – See exactly how much money emails generate.

  4. AI-powered features – Smarter recommendations and automation.

  5. Unified email + SMS platform – Manage both in one place.

Agencies know how to squeeze every drop of value from these features.

Core Services Offered by a Klaviyo Marketing Agency

1. Platform Setup & Migration

Switching from Mailchimp, ActiveCampaign, or Omnisend? Agencies handle the entire migration and ensure nothing is lost.

2. Automation Flow Creation

They build high-converting automations like:

  • Welcome series

  • Cart abandonment recovery

  • Browse abandonment reminders

  • Post-purchase upsells

  • Win-back sequences

3. Campaign Management

Agencies create regular promotions, holiday campaigns, and product launch emails.

4. Design & Branding

Professionally designed templates keep emails consistent with your brand identity.

5. Copywriting & Storytelling

Subject lines, body copy, and CTAs are optimized for clicks and conversions.

6. SMS Marketing

They integrate SMS into your strategy for even stronger results.

7. Data Analytics & Reporting

Detailed reports show you ROI, growth, and opportunities for scaling.

The Benefits of Hiring a Klaviyo Marketing Agency

Hiring an agency means you’re not just outsourcing—you’re investing in growth.

  • Increase Revenue: Many ecommerce brands grow email-driven sales to 30–40% of total revenue.

  • Save Time: Free up your schedule for operations, product, and growth.

  • Leverage Expertise: Agencies know the platform inside out.

  • Better Deliverability: They ensure your emails land in inboxes, not spam.

  • Ongoing Optimization: Agencies keep testing, tweaking, and improving.

When Should You Hire a Klaviyo Marketing Agency?

You probably need one if:

  • You don’t have automated flows set up.

  • Email brings in less than 20% of your total revenue.

  • You only send emails during sales.

  • You lack time or skills for campaign management.

  • You’re stuck and want to scale faster.

How Much Does a Klaviyo Marketing Agency Cost?

Pricing depends on scope, but here’s a breakdown:

  • Setup/Migration: $1,500 – $5,000

  • Monthly Retainer: $2,500 – $10,000+

  • Campaign-only packages: $1,000 – $6,000

Remember: with email’s average ROI of $36 per $1 spent, agencies often pay for themselves many times over.

How to Choose the Right Klaviyo Marketing Agency

Not all agencies are created equal. Here’s what to look for:

  1. Klaviyo Partner Badge – Shows verified expertise.

  2. Industry Experience – Have they worked with brands like yours?

  3. Case Studies & Results – Can they prove revenue growth?

  4. Clear Reporting – You should know exactly what’s working.

  5. Cultural Fit – Do they understand your brand voice?

The Onboarding Process: What to Expect

A typical onboarding looks like this:

  • Week 1–2: Account audit, setup, or migration.

  • Week 3–4: Build essential automation flows.

  • Month 2: Launch campaigns, run A/B tests, refine strategies.

  • Month 3+: Scale, optimize, and expand into SMS.

Mistakes a Klaviyo Marketing Agency Helps You Avoid

  • Spamming subscribers with irrelevant emails.

  • Neglecting list hygiene, leading to poor deliverability.

  • Overlooking SMS opportunities.

  • Relying only on holiday sales.

  • Ignoring performance data.

Future of Klaviyo Marketing

Looking ahead, Klaviyo marketing agencies will leverage:

  • AI-driven personalization for even smarter targeting.

  • Cross-channel customer journeys that mix email, SMS, and social ads.

  • Deeper analytics on customer lifetime value.

  • Hyper-personalized shopping experiences.

Case Study: Real Impact of a Klaviyo Marketing Agency

A fashion ecommerce brand struggled with low repeat purchases. Email contributed just 12% of sales.

After hiring a Klaviyo marketing agency:

  • Email revenue rose to 38% of total sales.

  • Repeat purchase rate jumped 42%.

  • Average order value increased by 22%.

This transformation wasn’t luck—it was strategy.

Conclusion

Hiring a Klaviyo marketing agency can be a game-changer for ecommerce brands. With their expertise in automation, segmentation, and personalization, agencies turn your email and SMS strategy into a powerful growth engine.

Instead of guessing what works, you’ll have a team of specialists driving predictable revenue and stronger customer relationships.

If you’re serious about scaling, it’s time to consider partnering with a Klaviyo marketing agency.

FAQs

1. Can a Klaviyo marketing agency work with small businesses?
Yes—many agencies tailor services for startups and growing brands.

2. How soon will I see results?
Most businesses see improvements within 30–60 days.

3. Do agencies only manage email, or SMS too?
The best ones handle both email and SMS in Klaviyo.

4. How do I know if my agency is performing well?
Check metrics like revenue from email, open rates, and conversions.

5. Is Klaviyo really better than Mailchimp for ecommerce?
Absolutely—Klaviyo is designed specifically for ecommerce businesses.