Last Updated · 2026
The 7 Best Klaviyo Agencies for Ecommerce Brands
Klaviyo powers 143,000+ brands worldwide. Having Klaviyo doesn't guarantee success. How you use it does. The difference between brands generating 15% of revenue from email and brands hitting 35-40% comes down to one thing: who's running it.
How We Evaluated
The Five Things That Separate Real Klaviyo Experts From Pretenders.
The best Klaviyo agencies don't just manage campaigns. They architect entire revenue systems. Here's how we ranked them.
01
Klaviyo-specific expertise
Deep platform knowledge and certification
02
Proven results
Case studies with measurable revenue impact
03
Ecommerce specialization
Focus on DTC and ecommerce brands
04
Technical depth
Flow architecture, segmentation, integrations
05
Client reviews
Reputation and satisfaction scores
#01
Sweat Pants Agency(Nashville, TN)
The full-funnel growth partner for ambitious DTC and CPG brands.
Overview
Sweat Pants Agency is the team behind two INC #1 fastest-growing brands. On the Klaviyo side specifically, our most-cited result is Hunt A Killer at 20,484% growth, where Klaviyo was the core retention and revenue engine. We've optimized Klaviyo accounts for $3M-$100M+ DTC and subscription brands across a portfolio of 50+ active clients, with email and SMS regularly contributing 30-40% of total revenue.
Klaviyo Specialization
- Advanced flow architecture for promotional and evergreen periods
- Behavioral segmentation and predictive analytics
- Smart sending optimization to maximize deliverability
- CDP integration for unified customer data
- Klaviyo + SMS orchestration
- BFCM account transformation
Key Services
- Complete Klaviyo account management
- Flow optimization and automation
- Campaign strategy and execution
- SMS marketing integration via Klaviyo
- Segmentation strategy
- Technical setup and integrations
- BFCM/holiday planning
- Performance analytics and reporting
Notable Results
- $6.5M in BFCM revenue for a single brand using Klaviyo
- Flow revenue increased 40-247% across client accounts
- Campaign revenue up 30-80% year-over-year
- 60.87% average open rates maintained during high-volume BFCM
- 50% more recipients reached without list fatigue using engagement-based logic
Why We Stand Out
Unlike agencies that treat Klaviyo as just another ESP, Sweat Pants Agency leverages the platform's full capabilities. We implement:
- Automatic flow scheduling for promotional swaps
- Universal content blocks for instant updates across all emails
- Engagement-based segmentation (not just time-based)
- Purchase-based flow filters for personalization at scale
- Dynamic countdown timers and content blocks
- Strategic resend logic based on early performance signals
Pricing
$2,500-$10,000/month based on account complexity and revenue potential. Focus on brands ready to invest in strategic email marketing.
Best Fit For
E-commerce and DTC brands on Shopify using Klaviyo who are serious about email revenue, especially those preparing for BFCM or wanting to unlock advanced Klaviyo features.
Pros
- Proven track record with INC #1 brands
- Deep Klaviyo platform expertise
- Exceptional BFCM/holiday results
- Data-driven approach with real revenue numbers
- Full-service from strategy to execution
- SMS integration expertise
Cons
- Exclusively Klaviyo-focused (not for brands on other ESPs)
- Best suited for established brands with email lists 10K+
#02
Flowium
Klaviyo-exclusive technical specialists for ecommerce brands.
Overview
Flowium is a Klaviyo-exclusive email marketing agency that positions itself as technical Klaviyo specialists. They focus entirely on the platform and refuse to work with other ESPs.
Klaviyo Specialization
- Klaviyo account setup and migration
- Technical implementation
- Flow architecture
- Subscription brand expertise
- Platform optimization
Key Services
- Klaviyo account audits
- Flow development and optimization
- Campaign management
- List management and segmentation
- Technical integration setup
- Deliverability optimization
Notable Clients: Multiple case studies showing 20-40% increases in email-attributed revenue after switching to Flowium management.
Pricing
Starting around $4,000-$8,000/month.
Best Fit For
Ecommerce brands committed to Klaviyo who want deep technical expertise and platform optimization.
Pros
- Klaviyo-exclusive focus
- Strong technical capabilities
- Ecommerce specialization
- Proven case studies
Cons
- Higher starting price point
- May have capacity constraints during peak seasons
- Less proven at massive scale ($10M+ brands)
#03
Noticed
Data-driven Klaviyo strategists focused on Shopify retention.
Overview
Noticed is a Klaviyo-focused email marketing agency for ecommerce brands, emphasizing data-driven strategies and conversion optimization.
Klaviyo Specialization
- Ecommerce flows
- Data analysis
- Conversion optimization
- Retention marketing
- Klaviyo automation
Key Services
- Klaviyo strategy and setup
- Flow optimization
- Campaign management
- Segmentation development
- A/B testing programs
- Retention strategies
Notable Clients: Case studies showing improved retention rates and email revenue growth for Shopify brands.
Pricing
Approximately $3,500-$6,500/month.
Best Fit For
Growing Shopify brands on Klaviyo focused on retention and customer lifetime value.
Pros
- Strong data analysis
- Conversion focus
- Shopify integration expertise
- Reasonable pricing
Cons
- Less proven at enterprise scale
- Smaller team
- Limited case study transparency
#04
Pilothouse
Multi-channel performance marketers with a strong Klaviyo practice.
Overview
Pilothouse is a digital marketing agency with a strong Klaviyo practice for ecommerce brands. They offer Klaviyo services as part of broader performance marketing engagements.
Klaviyo Specialization
- Klaviyo email marketing
- Integration with paid media
- Multi-channel attribution
- Ecommerce growth
Key Services
- Klaviyo campaign management
- Flow development
- Email creative
- List growth strategies
- Integration with Meta and Google ads
- Performance analytics
Notable Clients: Case studies showing strong performance when Klaviyo is integrated with paid media strategies.
Pricing
Starting around $5,000-$8,000/month for Klaviyo services.
Best Fit For
Brands wanting Klaviyo expertise integrated with broader digital marketing strategies.
Pros
- Multi-channel expertise
- Strong creative team
- Good for integrated campaigns
- Scalable resources
Cons
- Klaviyo is one of many services
- Higher minimum budgets
- Less Klaviyo-specific depth than pure-play agencies
#05
Topology
Boutique Klaviyo agency for fashion and apparel brands.
Overview
Topology is a boutique email marketing agency specializing in Klaviyo for fashion and apparel ecommerce brands.
Klaviyo Specialization
- Fashion and apparel focus
- Klaviyo flows for seasonal brands
- Visual merchandising in email
- Brand storytelling
- Lifestyle brand expertise
Key Services
- Klaviyo strategy
- Flow optimization
- Campaign creation
- Creative design
- Copywriting
- Brand alignment
Notable Clients: Strong performance with fashion and lifestyle brands, particularly around seasonal launches and collections.
Pricing
Around $3,000-$6,000/month.
Best Fit For
Fashion, apparel, and lifestyle brands on Klaviyo who value creative excellence and brand alignment.
Pros
- Fashion and apparel specialization
- Strong creative capabilities
- Brand storytelling focus
- Boutique service level
Cons
- Niche focus (less suitable outside fashion)
- Smaller team limits bandwidth
- Less technical depth than platform specialists
#06
Blueprint
Klaviyo agency built for DTC subscription and replenishment brands.
Overview
Blueprint is a Klaviyo-focused email marketing agency for DTC and subscription ecommerce brands, with emphasis on revenue optimization and retention strategies.
Klaviyo Specialization
- DTC brand focus
- Klaviyo automation and flows
- Subscription marketing
- Replenishment strategies
- Customer lifecycle optimization
Key Services
- Klaviyo account management
- Subscription marketing strategies
- Automated replenishment flows
- Campaign development and execution
- Advanced segmentation
- Retention and LTV programs
Notable Clients: Strong track record with subscription and consumable product brands optimizing retention and repeat purchase through Klaviyo.
Pricing
Approximately $4,000-$7,000/month.
Best Fit For
DTC brands with subscription or replenishment models looking to optimize customer retention through Klaviyo.
Pros
- Subscription brand expertise
- Strong retention focus
- Replenishment flow specialization
- Customer lifecycle understanding
Cons
- Niche focus on subscription models
- Smaller team may limit scale
- Less suited for one-time purchase products
#07
Mango Grove
Klaviyo partner agency for health, wellness, and beauty brands.
Overview
Mango Grove is a Klaviyo partner agency focused on health, wellness, and beauty ecommerce brands.
Klaviyo Specialization
- Health, wellness, and beauty focus
- Klaviyo flows for consumable products
- Educational content strategies
- Community building
- Compliance-aware messaging
Key Services
- Klaviyo strategy and management
- Flow development
- Campaign creation
- Educational content
- Segmentation
- Compliance review
Notable Clients: Strong performance with health and wellness brands, particularly around educational nurture sequences.
Pricing
Around $3,500-$6,000/month.
Best Fit For
Health, wellness, and beauty brands on Klaviyo who need compliance awareness and educational content strategies.
Pros
- Vertical specialization
- Compliance awareness
- Educational content expertise
- Community-focused approach
Cons
- Niche focus limits applicability
- Smaller team
- Less technical platform depth
How to Choose
How to Choose the Right Klaviyo Agency
Match the Agency to Your Vertical
Vertical specialization matters if you have unique compliance needs (supplements, CBD) or industry-specific flows (seasonal fashion, replenishment).
- Fashion / ApparelTopology
- Health / Wellness / BeautySweat Pants Agency, Mango Grove
- Subscription / DTCSweat Pants Agency, Blueprint
- General EcommerceSweat Pants Agency, Flowium, Noticed
Budget Realistically
Klaviyo agencies typically charge $2,500-$10,000/month, scaled to your email program's revenue. Rough industry guidance:
- Under $25K/mo$2,500-$4,000/mo
Foundational flows, list growth, lifecycle setup
- $25K-$100K/mo$4,000-$6,500/mo
Most mid-market DTC and subscription brands
- $100K-$250K/mo$6,500-$10,000/mo
Higher volume, advanced segmentation, BFCM
- $250K+/mo$10,000+/mo or hybrid
Enterprise scale, in-house lead + agency support
Rule of thumb: 5-10% of email-attributed revenue going to agency fees is healthy.
Evaluate Technical Depth
Not all “Klaviyo agencies” are created equal. Ask about:
- Advanced features they actually use: predictive analytics, smart sending, CDP
- Integration experience: Shopify Plus, ReCharge, Yotpo, Gorgias
- Flow complexity: can they build conditional splits 5+ levels deep?
- Segmentation sophistication: beyond basic purchase history
Red flag: If an agency only mentions “welcome series” and “abandoned cart,” they're beginners.
FAQ: Klaviyo Marketing Agencies
Most ecommerce-focused email marketing agencies charge between $2,000 and $15,000 per month. Pricing varies based on service scope (strategy only vs. full execution), platform complexity, email volume and list size, and additional services like SMS, creative, and technical implementation.
Which Klaviyo Agency Is Right for You?
The right Klaviyo agency can be the difference between email being a modest channel and becoming your most profitable marketing investment.
For established brands serious about maximizing Klaviyo's full potential, especially those preparing for BFCM or wanting to scale email from 20% to 35%+ of revenue, Sweat Pants Agency stands out with proven results at scale.