Klaviyo Reviews in September 2026: User Ratings, Pros & Cons

"Best-in-Class Email and SMS solution for ecommerce"

What do you like best about Klaviyo? They allow you to run your email and SMS in one place, which makes strategy across those two channels so much more cohesive. Not to mention the ability to segment customers to ensure you can personalize messaging based on specific interests, purchase history, etc.

"I straight up don't want to work out of any other ESP for ecommerce."

What do you like best about Klaviyo? Klaviyo has everything an ecommerce business owner needs to drive more revenue with email. The segmentation is powerful, the analytics are in-depth, the email creation process is very user-friendly, the support is second to none, the integrations are robust, and way more.

"Flexible and Fast"

What do you like best about Klaviyo? Klaviyo is really fast to get up and running and the integrations are rock-solid dependable. What do you dislike about Klaviyo?

"Easily one of the best all-in-one customer platforms out there!"

What do you like best about Klaviyo? Klaviyo has immensely useful and impactful business insights between their analytics dashboard, benchmarking tools, and ability to break down attribution. When you're managing a multitude of customer information from varying sources of zero-party to third-party data, Klaviyo helps you break it down and use it in a meaningful way—without a data scientist behind the keyboard. On top of their analytics, it's incredibly user-friendly from a UI and navigation ...

"My favorite ESP for eCommerce!"

What do you like best about Klaviyo? I find Klaviyo really intuitive and easy to use. It's a platform I think both novices to email marketing and those who are total pros would appreciate - easy enough to start using "out of the box" but with many opportunities for optimization/more complicated set-ups. Compared to other ESPs, Klaviyo is SO much faster with running segments and loading reports. It connects to all the other vendors/programs I use seamlessly. You don't need to have a heavy ...

"Klaviyo - The Great eCommerce ESP"

What do you like best about Klaviyo? Klaviyo is a powerful ESP that we leverage to help our merchants grow their owned revenue. What do you dislike about Klaviyo?

I have been using this company for…

I have been using this company for about a year and haven't been able to put my full attention on their services because I was working a full-time job and working my business part time. Now I'm full-time in my business i have learned so much that i never knew lol...the strategies they have set up for you to research and grow from are amazing. The test they have you take after completing a course is very good. One good thing about this company is you have to study and be determined to learn ...

Great platform

My company moved from Mailchimp to Klaviyo to increase revenue and automate more processes. As well, we work with Salesforce, which involves a lot of development work, and Klaviyo makes this easier. Is a great platform, with a lot of great options to segment and create a lot of flows. Thanks to their support team, I have found the entire process to be very easy and efficient. The onboarding process was also very easy and pleasant. A special thanks goes out to Tamsin, who made this ...

"We use Klaviyo for every single ecommerce store we work with"

What do you like best about Klaviyo? So many. They integrate with all of the other best-in-class e-commerce apps that our clients use, which gives us a complete 360 view of every customer in our CRM, allowing us to segment and personalize our email, SMS, push, and direct mail communications with our customers at scale.

"Great platform, best in the biz!"

What do you like best about Klaviyo? Klaviyo is the most powerful email platform for Shopify users. It integrates with everything and is too powerful not to us. If you don't use it you're an egghead.