Top 10 Klaviyo Agencies to Supercharge Your Email Marketing in 2025

Email marketing remains one of the most powerful tools for e-commerce businesses looking to boost customer engagement, increase retention, and drive conversions. Klaviyo, a leading email automation platform, offers advanced segmentation, personalization, and automation features that help brands optimize their marketing efforts. However, leveraging Klaviyo’s full potential requires expertise, strategy, and execution. Luckily, this is exactly where the top Klaviyo agencies come into play.

With countless agencies offering Klaviyo services, choosing the right one can be overwhelming. To help, we’ve compiled a list of the 10 top Klaviyo agencies you should hire in 2025 based on their expertise, client satisfaction, and proven results. Let’s take a look!

Top 10 Klaviyo Agencies to Consider

1. InboxArmy

Founded: 2016
Employees: 51-200
Clutch Rating: 4.9/5

InboxArmy has worked with over 5,000 businesses across industries such as e-commerce, healthcare, and financial services. Their data-driven approach ensures high email deliverability rates, and clients have reported an average increase of 30% in revenue from email marketing alone. InboxArmy has strong experience working with small startups to Fortune 500 companies, ensuring scalable email solutions for businesses of all sizes. As one of the top Klaviyo agencies, their campaigns consistently achieve open rates above 40% and click-through rates of 10-15%. They also offer fully managed email marketing services, which makes them a perfect choice for brands looking to outsource their email operations.

Services:

• Klaviyo email automation setup and optimization
• Advanced segmentation for targeted campaigns
• A/B testing and performance analytics
• Custom Klaviyo email template design
• ESP migration to Klaviyo
• Email deliverability monitoring and improvement
• SMS marketing automation integrated with Klaviyo
• Fully managed email marketing services

Why Choose Them?

InboxArmy’s end-to-end Klaviyo management guarantees that brands maximize revenue without handling the complexities themselves.

2. CQL

Founded: 1995
Employees: 51-200
Clutch Rating: 4.8/5

CQL is a digital commerce agency with over 25 years of experience in e-commerce strategy and implementation. Their Klaviyo-focused services integrate seamlessly with major platforms like Shopify and Magento, improving customer retention by an average of 40%. They work with global brands and retailers, helping them scale email marketing with AI-driven segmentation and predictive analytics. Their clients have seen up to a 3x increase in customer lifetime value (CLV) through targeted Klaviyo strategies. CQL also provides robust data analytics, helping brands fine-tune their email performance for long-term success.

Services:

• Klaviyo-powered email flows for lifecycle marketing
• Customer journey mapping using Klaviyo’s data tools
• Predictive analytics for personalized email strategies
• Dynamic product recommendations via Klaviyo
• Shopify and Magento integration for automated emails
• Cross-channel Klaviyo and SMS marketing
• Custom email reporting dashboards

Why Choose Them?

Their expertise in e-commerce development and Klaviyo marketing makes them a powerhouse for scaling online stores.

3. Hawke Media

Founded: 2014
Employees: 201-500
Clutch Rating: 4.7/5

Hawke Media has helped over 3,000 businesses scale their digital marketing efforts, and their Klaviyo campaigns have driven an average 20-25% revenue lift for e-commerce brands. They have worked with brands like Red Bull, Proactiv, and Crocs, delivering highly customized Klaviyo solutions tailored to each client’s needs. Their focus on blending Klaviyo with omnichannel marketing has helped clients achieve engagement rates 2x higher than the industry standard. They also specialize in customer acquisition and retention through Klaviyo-powered automation and personalization.

Services:

• Klaviyo campaign strategy and execution
• Email copywriting and brand storytelling
• Customer segmentation using Klaviyo’s AI tools
• Integrating Klaviyo with paid media for omnichannel marketing
• Automated re-engagement campaigns for churn reduction
• Full-funnel email marketing strategy
• Customer acquisition through personalized email flows

Why Choose Them?

Their expertise in combining Klaviyo with paid media ensures brands drive conversions from multiple channels.

4. King Pixel Digital

Founded: 2018
Employees: 2-10
Clutch Rating: 4.5/5

King Pixel Digital is a boutique agency that has managed over $10M in ad spend and helped businesses increase email-driven revenue by up to 50% through Klaviyo automation. Their team of specialists ensures that each Klaviyo flow is meticulously designed for maximum conversion. They specialize in high-ticket e-commerce sales, delivering average email revenue growth of 35% within three months. They also provide ongoing optimization services, ensuring that email strategies evolve based on performance data.

Services:

• Klaviyo email flow development (welcome series, abandoned cart, post-purchase, etc.)
• Conversion-focused email copy and creative design
• List cleaning and email reputation management
• Klaviyo analytics and performance tracking
• Integration with third-party e-commerce tools
• High-converting email sequences for high-ticket items
• Continuous optimization and A/B testing

Why Choose Them?

Their hands-on optimization process ensures brands get long-term value from their Klaviyo campaigns.

5. Sticky Digital

Founded: 2017
Employees: 11-50
Clutch Rating: 4.6/5

Sticky Digital has supported brands in generating over $100M in revenue through personalized email campaigns. Their deep knowledge of Klaviyo’s automation features makes them a preferred partner for e-commerce brands. They specialize in luxury and lifestyle brands, delivering premium email experiences with dynamic content personalization. They also provide fully custom email workflows that adapt based on real-time customer interactions, ensuring every email is relevant.

Services:

• Klaviyo-powered behavioral email automation
• Lifecycle email strategies to increase repeat purchases
• Custom Klaviyo templates designed for mobile optimization
• In-depth reporting and conversion tracking
• Personalized product recommendation emails
• A/B testing for subject lines and content blocks
• Real-time customer behavior tracking for email personalization

Why Choose Them?

Their ability to dynamically tailor email content to customer behavior makes them stand out in the e-commerce space.

6. FlowCandy

Founded: 2019
Employees: 11-50
Clutch Rating: 4.9/5

FlowCandy is an email automation powerhouse that has helped e-commerce brands increase email-driven revenue by 35% on average. They specialize in designing high-converting email flows that engage customers at every stage of the buying journey. From abandoned cart sequences to personalized post-purchase emails, they ensure brands maximize their customer relationships. Their clients often see improved retention rates, with repeat purchases increasing by up to 50%.

Services:

• Klaviyo email automation and workflow development
• Hyper-personalized email flows based on customer behavior
• AI-driven segmentation for precise targeting
• SMS marketing integrated with Klaviyo
• Email and SMS A/B testing for continuous optimization
• Real-time analytics and performance tracking

Why Choose Them?

FlowCandy’s ability to create seamless automation keeps customers engaged while driving long-term sales growth.

7. Rejoiner

Founded: 2011
Employees: 11-50
Clutch Rating: 4.8/5

Rejoiner is an expert in customer retention and abandoned cart recovery. Their clients have recovered over $1 billion in lost revenue through strategic Klaviyo email flows. They specialize in lifecycle marketing, ensuring customers stay engaged long after their first purchase. Their team integrates Klaviyo data with predictive analytics to send emails at the optimal time for conversions, often resulting in a 3x increase in purchase rates.

Services:

• Advanced Klaviyo cart abandonment solutions
• Automated re-engagement and win-back campaigns
• Personalized email sequences for customer retention
• Conversion-optimized Klaviyo templates
• Performance tracking with detailed campaign insights
• Predictive analytics for optimal send times

Why Choose Them?

Their expertise in recovering lost sales makes them a top choice for brands looking to improve retention and boost overall revenue.

8. Hustler Marketing

Founded: 2018
Employees: 51-100
Clutch Rating: 4.8/5

Hustler Marketing is a full-service Klaviyo agency specializing in email marketing strategies that drive revenue and customer engagement. They’ve worked with over 100 e-commerce brands, helping them achieve an average 25% boost in email-driven sales. Their team focuses on automation, segmentation, and creative content that enhances brand loyalty and maximizes conversions.

Services:

• Klaviyo email automation and segmentation
• Custom email designs for high-converting campaigns
• Performance tracking and A/B testing
• Personalized email flows and product recommendations
• SMS marketing integration for omnichannel engagement

Why Choose Them?

Their strategic email automation and personalized campaigns make them a top choice for brands looking to scale their email marketing efforts.

9. Email Uplers

Founded: 2013
Employees: 201-500
Clutch Rating: 4.9/5

Email Uplers is one of the top Klaviyo agencies and email design boutiques, specializing in creating stunning, high-converting Klaviyo templates. With over 100,000 email templates designed, they know what works when it comes to engagement and conversions. Their expertise in coding ensures that emails render perfectly across all devices, increasing click-through rates by up to 30%.

Services:

• Klaviyo email template design and coding
• Mobile-optimized, interactive email experiences
• Custom automation workflows for e-commerce brands
• ESP migration to Klaviyo with minimal downtime
• Scalable automation using Klaviyo’s API
• Email accessibility and compliance optimization

Why Choose Them?

Their design expertise ensures that every Klaviyo email campaign looks visually stunning while driving real engagement.

10. Avex Designs

Founded: 2015
Employees: 11-50
Clutch Rating: 4.8/5

Avex Designs specializes in Klaviyo email marketing for high-growth e-commerce brands, particularly those on Shopify. Their strategies have helped businesses generate over $500M in revenue, thanks to their deep understanding of how to blend email marketing with a seamless customer experience. Due to leveraging advanced segmentation and behavioral triggers, they create email flows that keep customers engaged and drive repeat purchases.

Services:

• Klaviyo email marketing strategies tailored for Shopify brands
• Personalized email campaigns for customer retention
• Automated lifecycle emails designed to increase AOV
• Data-driven segmentation and performance analysis
• ESP migrations to Klaviyo with seamless data integration
• Custom email design that aligns with brand aesthetics

Why Choose Them?

Their expertise in Shopify and Klaviyo integrations ensures a smooth, scalable email marketing strategy that aligns with e-commerce growth.

How to Choose the Best Klaviyo Agency for Your Business?

Not all agencies offer the same level of expertise, and selecting the right partner can make a big difference in how well your email marketing performs. So when evaluating top Klaviyo agencies, consider these key factors:

• Industry Experience: An agency with experience in your industry understands customer behavior and knows what works. E-commerce brands should look for agencies that specialize in online retail and customer retention.
• Services Offered: Some agencies provide full-service email marketing, including automation, segmentation, and creative services, while others focus strictly on email templates or Klaviyo implementation.
• Case Studies and Results: A strong portfolio with real data-backed results can give insight into an agency’s effectiveness. Look for documented improvements in open rates, conversion rates, and revenue growth.
• Customization and Personalization: Klaviyo’s strength lies in personalized marketing. The best agencies tailor email campaigns to your business goals instead of using a one-size-fits-all strategy.
• Pricing and Scalability: Some agencies work best with startups, while others cater to enterprise brands. Make sure the agency’s pricing and service structure align with your growth plans.
• Customer Support and Communication: Regular reporting, transparent collaboration, and a proactive support team are a must for maximizing email marketing performance.