That’s where a Klaviyo marketing agency comes in. These specialists don’t just send emails—they build systems that nurture customers, recover abandoned carts, and keep your audience buying again and again.

In this guide, we’ll break down everything you need to know about working with a Klaviyo agency: what they do, how they help, what it costs, and how to pick the right one for your brand.

What is a Klaviyo Marketing Agency?

A Klaviyo marketing agency is a team of experts that specialize in running email and SMS marketing campaigns on the Klaviyo platform.

They go beyond simply sending newsletters. Their job is to create automated customer journeys—from welcoming new subscribers to reactivating old customers—so your marketing runs on autopilot.

Think of them as your in-house marketing team, but laser-focused on Klaviyo.

Why Choose Klaviyo Over Other Platforms?

Klaviyo isn’t just another email tool. It’s specifically built for ecommerce, and that’s why agencies love it.

1. Ecommerce Integrations

Works seamlessly with Shopify, WooCommerce, BigCommerce, and Magento.

2. Data-Driven Personalization

Target customers based on purchase history, browsing behavior, and predicted lifetime value.

3. Revenue Attribution

See exactly how much money each email or SMS brings in.

4. Advanced Segmentation

Build hyper-targeted lists (e.g., “VIP customers who spent $500+”).

5. All-in-One Platform

Email + SMS + analytics in one place.

With all these features, a Klaviyo marketing agency can turn them into strategies that directly boost revenue.

Services Offered by a Klaviyo Marketing Agency

1. Account Setup & Migration

Agencies handle the technical side—whether you’re new to Klaviyo or migrating from Mailchimp, Omnisend, or ActiveCampaign.

2. Automated Email Flows

Essential flows every agency sets up include:

  • Welcome series

  • Abandoned cart reminders

  • Post-purchase upsell

  • Win-back campaigns

  • Browse abandonment

3. Campaign Management

Holiday sales, product launches, and promotions—done professionally and on schedule.

4. SMS Marketing

Text messages get 98% open rates. Agencies know how to blend SMS with email without annoying customers.

5. Creative & Design

On-brand templates that are mobile-friendly and optimized for conversions.

6. Copywriting

Engaging subject lines, persuasive body copy, and strong CTAs.

7. Analytics & Optimization

Constant A/B testing and reporting to improve results month after month.

Benefits of Hiring a Klaviyo Marketing Agency

Hiring an agency isn’t an expense—it’s an investment. Here’s why:

  • Revenue Growth – Brands often see 25–40% of total sales come from Klaviyo after hiring an agency.

  • Time Savings – Free up hours every week.

  • Expert Strategy – Get proven methods tailored to your industry.

  • Better Deliverability – Keep your emails out of spam folders.

  • Scalability – Agencies adapt your flows as your business grows.

Signs You Need a Klaviyo Marketing Agency

Not sure if you’re ready? Look out for these warning signs:

  • Your emails bring in less than 15% of revenue.

  • You only send emails during big sales.

  • You don’t have automated flows running.

  • Your list engagement keeps dropping.

  • You’re too busy running the rest of your business.

If that sounds familiar, a Klaviyo marketing agency can be a game-changer.

How Much Does a Klaviyo Marketing Agency Cost?

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

  • Setup/Migration: $1,000–$5,000

  • Monthly Retainer: $2,000–$10,000+

  • Campaign-Only Packages: $1,500–$6,000

Given that email marketing delivers $36 for every $1 spent, the ROI usually justifies the investment.

How to Choose the Right Klaviyo Marketing Agency

Here’s a checklist before signing with any agency:

  • Are they a certified Klaviyo Partner?

  • Do they have case studies or testimonials?

  • Have they worked with brands like yours?

  • Do they offer transparent reporting?

  • Can they adapt to your brand voice and audience?

What Working With a Klaviyo Marketing Agency Looks Like

Typical onboarding timeline:

  • Week 1–2: Audit + strategy.

  • Week 3–4: Setup key flows.

  • Month 2: Launch campaigns and SMS.

  • Month 3+: Ongoing optimization and scaling.

Common Mistakes Agencies Help You Avoid

  • Over-emailing customers.

  • Sending generic, non-personalized content.

  • Neglecting list hygiene (causing spam issues).

  • Not testing subject lines or CTAs.

  • Ignoring SMS as a revenue booster.

Future of Klaviyo Marketing Agencies

The next wave of agency strategies will involve:

  • AI-powered personalization

  • Predictive analytics to forecast churn

  • Omnichannel campaigns blending email, SMS, and paid ads

  • Automated lifecycle marketing across every stage of the funnel

Case Study: Real Results From a Klaviyo Agency

A fashion brand earning $100K/month brought in just 12% of revenue from email.

After hiring a Klaviyo marketing agency:

  • Email revenue grew to 38% of sales.

  • Cart recovery emails generated $20K/month.

  • Customer retention jumped by 30%.

That’s the power of a specialist team.

Conclusion

Email and SMS aren’t optional anymore—they’re the backbone of ecommerce growth. If you’re leaving them on autopilot or barely scratching the surface, you’re missing out on massive revenue potential.

A Klaviyo marketing agency gives you the expertise, tools, and strategy to turn your customer list into a profit machine. Whether you’re just getting started or scaling past six figures, the right partner can make all the difference.

FAQs

1. Do Klaviyo agencies work with small businesses?
Yes—many specialize in helping startups grow their first lists.

2. How fast can an agency improve results?
Most brands see revenue improvements within 30–60 days.

3. Can an agency help with both email and SMS?
Definitely—Klaviyo supports both, and agencies optimize them together.

4. Is Klaviyo better than Mailchimp for ecommerce?
Yes—Klaviyo was built specifically for ecommerce.

5. Do I lose control when hiring an agency?
No—you stay in control. Agencies just provide strategy and execution.