Brenda Zambrano, Senior Email Marketing Specialist at Hustler Marketing
Klaviyo Elite Partner | 9 Years Retention Marketing Experience | 450+ Brands Scaled
Quick Summary
Hiring a Klaviyo agency gives you access to the strategy, execution, and optimization needed to turn email into a reliable revenue channel. Most brands don’t lack tools — they lack the time and expertise to use them effectively.
- Agencies build and manage full email systems
- Better for scaling than freelancers or in-house alone
- Requires ecommerce-specific expertise
- Good agencies focus on revenue, not just sends
- Choosing the right partner directly impacts growth
What Does a Klaviyo Agency Actually Do?
A Klaviyo agency is responsible for building and managing your entire email and SMS system.
Core Responsibilities
- Account setup and store integration
- Flow strategy and build (welcome, cart, post-purchase, etc.)
- Campaign planning, copywriting, and execution
- Segmentation strategy and optimization
- Deliverability management and list hygiene
- Reporting and performance tracking
- SMS strategy and integration
A good agency doesn’t just send emails. It builds a system that drives revenue.
What Brands Typically Keep In-House
- Brand voice and creative direction
- Product knowledge
- Internal approvals
The best setups are collaborative, not fully outsourced.
Should You Hire an Agency, Build In-House, or Use a Freelancer?
Each option has trade-offs.
| In-House | Full control, internal teams | High cost, slower scaling |
| Freelancer | Lower cost, tactical support | Limited bandwidth and strategy |
| Agency | Scale, expertise, consistency | Higher upfront investment |
When Each Makes Sense
In-House:
- You have a full marketing team
- You can hire and manage specialists
Freelancer:
- You need help with specific tasks
- Budget is limited
Agency:
- You want to scale revenue
- You need strategy + execution
- You don’t have internal bandwidth
Most brands don’t need more emails. They need a better system; that’s where agencies win.
What Should You Look for in a Klaviyo Agency?
Not all agencies are equal. These are the signals that matter.
Klaviyo Partner Status
Indicates:
- Proven experience
- Platform expertise
- Verified track record
Ecommerce-Specific Experience
You want:
- Shopify or WooCommerce experience
- Understanding of ecommerce lifecycle
Transparent Reporting
You should see:
- Revenue attribution
- Flow performance
- Campaign performance
Flow + Campaign Expertise
Many agencies focus on one. You need both.
Deliverability Knowledge
Without this:
- Your emails won’t reach inboxes
- Performance will drop
Case Studies and References
Look for:
- Real ecommerce results
- Clear before/after performance
If an agency can’t show results, they probably can’t deliver them.
What Red Flags Should You Avoid?
These are deal-breakers.
Locking You Out of Your Own Account
You should always own your data and access.
No Reporting or Vague Metrics
If they can’t show revenue, that’s a problem.
Templated, One-Size-Fits-All Flows
Every brand is different. Your flows should be too.
No Deliverability Awareness
This leads to:
- Spam issues
- Lost revenue
Guaranteed Open Rates
Open rates are not controllable. This is a red flag. If it sounds too easy or guaranteed, it usually is.
What Questions Should You Ask Before Hiring?
Use this on your next call:
- How do you approach flow strategy for ecommerce brands?
- What percentage of revenue typically comes from flows?
- How do you measure success beyond open rates?
- How do you handle deliverability and list hygiene?
- What does your reporting look like?
- How do you approach segmentation?
- Can you show ecommerce case studies?
- How do you structure campaigns vs flows?
- What happens in the first 30–60 days?
- How do you collaborate with internal teams?
- The quality of answers you get here will tell you everything.
How Much Does a Klaviyo Agency Cost?
Pricing varies based on:
- Scope
- List size
- Complexity
General Ranges:
- Freelancers: lower cost, limited scope
- Agencies: higher cost, full system management
The real cost isn’t what you pay, it’s the revenue you miss without the right setup.
→See the Agency Pricing page for a detailed breakdown.
How Does a Klaviyo Agency Fit Into Your System?
A strong agency doesn’t replace your marketing.
It strengthens it:
- Builds your flows
- Optimizes your campaigns
- Improves segmentation
- Protects deliverability
Email becomes a predictable revenue channel, not a guessing game.
→See the Complete Klaviyo Guide to understand the full system.
If you’re not sure whether your Klaviyo setup is performing as it should, a strategy call can help identify gaps and opportunities.
Book a Klaviyo strategy call with Hustler Marketing.
Frequently Asked Questions
What does a Klaviyo agency do?
A Klaviyo agency builds, manages, and optimizes your email and SMS system to drive revenue.
How much does a Klaviyo agency cost?
Costs vary based on scope and complexity, but agencies typically charge more than freelancers due to broader services.
What is the difference between a Klaviyo partner and a regular agency?
A Klaviyo partner is officially recognized by Klaviyo for expertise and performance.
How do I know if a Klaviyo agency is good?
Look for ecommerce experience, clear reporting, strong case studies, and a focus on revenue.
Can I switch Klaviyo agencies without losing my data?
Yes. You own your Klaviyo account and data, so switching agencies does not affect your data.
Do I need Klaviyo experience before working with an agency?
No. A good agency will guide strategy, execution, and optimization for you.