Summary
Choosing a Klaviyo agency should leave nothing to chance. With the proliferation of players, it's essential to know how to compare Klaviyo agencies effectively to find the partner that will bring you a measurable ROI and lasting support.

Why compare Klaviyo agencies
Each agency promises expertise and performance, but only tangible evidence can distinguish the best. Comparing several agencies prevents you from choosing by default and allows you to identify the one that:
- understands your specific business needs,
- has proven experience in Klaviyo marketing automation,
- can demonstrate concrete results (open rates, conversion, ROI).
Essential criteria to consider
1. Expertise and experience
Choose an agency with years of experience, Klaviyo certifications, and documented client cases. Example: some agencies double email conversion rates in less than 6 months.
2. Range of services offered
Check that the agency covers all your needs: strategy, design, automation, e-commerce integrations, analytical monitoring.
3. References and testimonials
Consult customer reviews and case studies. A client testifying to a 40% increase in email revenue is much stronger proof than a mere promise.
4. Pricing and packages
Compare pricing models (flat fee, subscription, performance). Ensure that the cost aligns with your ROI objectives.
5. Customer support and assistance
A good partner is not limited to execution. Check availability (chat, email, phone) and support responsiveness.
4-step methodology
1. Gather information
- Browse agency official websites, social media, and review platforms.
- Note their strengths/weaknesses.
2. Build an evaluation grid
List your criteria (expertise, services, pricing, support) and assign a score from 1 to 5 to each agency.
3. Weight the criteria
Each company has its priorities: budget for an SME, advanced expertise for a scale-up. Weight your criteria to reflect your priorities.
4. Make the final decision
Once the scores are assigned and weighted, the choice becomes clear. A Stellar client shared:
“Thanks to this grid, we chose an agency that boosted our Klaviyo ROI by 35% in 3 months.”
Conclusion and final choice
Comparing Klaviyo agencies methodically ensures you choose a partner that will transform your email campaigns into a true growth lever.
👉 Looking for a certified Klaviyo agency with proven results? Discover Stellar's support.