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Klaviyo Email Marketing Reviews

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Klaviyo Email Marketing Reviews

Klaviyo Email Marketing Reviews

Real Feedback from eCommerce Brands I’ve Helped Grow

Over 150 eCommerce brands worldwide have trusted me with their Klaviyo email marketing. Here’s what they say about the results, the process, and the growth we achieved together.

★★★★★

"Ivana was extremely efficient, and proactive and had an incredible knowledge of the programs we were using. I'll 100% work with her again in the future."

Lewis Dalton - Lewis Dalton Copywriting Services Limited

Owner

★★★★★

"Ivana is a true Marketing partner for Trollbeads Canada. Since the first week, she has been instrumental in working on developing the best Klavyio flows so they complement our email marketing campaigns. She has a level of detail in her work that adds tremendous value for any E-COM owner. And once the flows are operational, she is instrumental in constantly improving and testing to improve the Marketing KPI's that we are looking for. Could not ask for a better partner."

Klaus Ryum Larsen - Trollbeads Canada

Owner

★★★★★

"We used to work with Ivana on a few projects to implement effective flows and campaigns on Klaviyo. Ivana has been always very committed, fast in responding and reliable. We’ve been abel to boost the revenue of our clients based on her actions. Anybody who is working with Klaviyo, I can recommend Ivana’s expertise."

Dominik Djukic - Empower Brands

CEO | Founder

Klaviyo Email Marketing Reviews

Client Reviews

I’m Ivana Kostić, a Klaviyo Expert and Email Marketing Strategist with 9+ years of experience and a proven record of 150+ successful Klaviyo projects across industries.

As a Top-Rated freelancer on Upwork with a 100% Job Success Score, I’m proud to be among the top 3% of freelancers worldwide. My clients consistently highlight the measurable impact of my work — from boosting revenue by 20–40% to building stronger customer loyalty with automation and campaigns.

👉 You can explore my full profile on Upwork to see verified reviews and results from brands I’ve partnered with.