Klaviyo is hands-down one of the most powerful email and SMS platforms out there for ecommerce. The depth of their analytics is where they really shine. From revenue attribution to flow-level performance and segmentation insights, Klaviyo gives you the kind of data that actually helps you make smarter decisions and squeeze more sales out of every campaign. The segmentation and automation capabilities are excellent, and once you know your way around the platform, it becomes a serious growth engine. If you care about understanding customer behavior and optimizing lifecycle marketing, Klaviyo is hard to beat. That said, pricing is the biggest downside. Being charged for all profiles in your account—even ones you never email—can feel frustrating, especially for growing brands with large lists. It would be much more fair (and sustainable) if pricing were based only on the profiles you actively send emails to. Overall, Klaviyo is an elite tool with best-in-class data and performance. If they adjusted their pricing model to better reflect actual usage, it would be close to perfect.

Great app to work with, with endless possibilities for segmentation and flow development. Also customer service is amazing, they are fast and always there to help us out whenever we need. Highly recommend it.

Disappointed in my experience with Klaviyo so far. The templates are quite poorly designed. Even the most basic templates, like for order confirmations, contain a lot of errors. I have been in constant contact with support trying to get them to include basic information that should be included automatically. For example, dynamic products were not being pulled in at all, so customers were not able to see what they purchased. This was simply an error with their template. Once we had that resolved, there was still a lot of missing information (like product variant flavors, apartment address lines, etc.) Little things that you may not notice while building, until customers complain. It took 3 support cases to get an order confirmation that simply has the correct products listed and the customers full shipping address... You cannot trust your onboarding specialist to check your emails or flows either. I had mine check our order confirmation flow multiple times before going live. She assured me we were all set and we set the flows to LIVE, and it simply did not work! She missed a key trigger that was keeping the emails from sending. We did not discover this until customers complained about missing confirmations. Again, so disappointed in the quality of the templates and the support i've been provided. While Klaviyo has all the latest and greatest features, some of the most simple and important things are severely lacking! I've used free email builders that have better designed templates.

I’ve really enjoyed using Klaviyo for email/SMS marketing. It’s flexible, easy to work with, and makes it simple to build targeted flows based on real customer behavior. The reporting and deliverability tools are solid, and the support team has been responsive and helpful whenever I’ve needed assistance. Overall, it’s a reliable platform that scales well as your business grows.

We are unsatisfied by the set up and ease of use of the Kaviyo SMS app. We have been locked out of our account and cannot access the app or are unaware of our status and customer service has not responded to requests to unlock account. Rating Poor, unresponsive, challenging to use.

I’m really unhappy with this app so far. Expecting users to pay for basic human assistance is unacceptable and leaves a very poor impression.

Atrocious customer service that has no basic knowledge. They don't even know what z-index means. Also, the smart translate feature is completely buggy. It translates some parts and leaves out others. Even mixes languages within 1 email. Ive been using Klaviyo now for 2 months and was better off with Omnisend. It was also cheaper with basically the same functions. What a waste.

Terrible app, we used to use it for sign ups, haven't used it since 2021, when after i deleted the app, thousands of fake emails got added to the list. I've been trying for hours to delete ALL customer's data, as well as all these bot email accounts with no success, can't even get support for it and refuse to pay to get it. the profile maintenance page is blank. just trying to comply with the LAW on customers data

I have paid for a plan and in the same date they have created me an invoice and i have told them that the invoice is incorrect and it needs to be changed, they said that the past invoice cant be changed, only the future ones if i modify in the settings the company name, etc. But i have requsted this in the same date when they have created my invoice, i dont understand why it cant be modify, its unbaliveble how they cant change the invoice.

Super easy to use and fantastic return on investment. Able to segment customers any which way we want so we can keep our customer engagement personal and relevant. Easy to set up and track impact of campaigns and flows.