Reviews (3,283)

Overall rating
4.7
Counts per rating level
  • 88% of ratings are 5 stars
  • 3% of ratings are 4 stars
  • 1% of ratings are 3 stars
  • 1% of ratings are 2 stars
  • 8% of ratings are 1 stars
Edited July 14, 2026

Updating again! Klaviyo has a lot of great tools but is also missing some basic functionality that we need for our business. When we joined Klaviyo we were encouraged to use the platform for our order confirmations. While they do look better than the native Shopify confirmations, once an order confirmation is sent, there’s currently no way to update the information or resend the confirmation to a different email address. If a customer accidentally enters the wrong shipping address, email address, etc, the confirmation remains permanently tied to the original information. Klaviyo only captures the data once and does not appear to sync updated order information from Shopify afterward.

This has created a lot of confusion and frustration for our customers because, for years, we've been able resend updated confirmations with corrected information. A very standard and important function for customer service.

At this point, we’ll likely need to move our order confirmations back to shopify because customers understandably want receipts.

Also disappointed with the pricing for SMS! It's quite steep and only seems to keep increasing year after year. It's becoming out of reach for a lot of small businesses.

Vermont Nut Free Chocolates
United States
9 months using the app
Klaviyo replied January 12, 2026

Thank you for the thoughtful feedback. A member of our Support Leadership team has reached out to you directly and is eager to work with you to address these issues.

June 19, 2025

Support is terrible. 24/5 live chat is unmanned through out the week. Email support is extremely slow and keeps sending useless articles. The data is helpful. The only reason we stayed is because Omnisend doesn't have A/B test for emails

Luko Luko
United States
4 months using the app
Klaviyo replied June 24, 2025

Thank you for the feedback. A member of our support team has reached out to you and is eager to help out!

Edited June 22, 2025

The platform is amazing -best out there .really happy with how it performs and ease of use . Love the courses . 5 stars

BUT the support is lacking .very very slow, limited weekend response , no phone number. Urgent issues when you can’t get into your account -took days to get a response ...very stressful when your business is running through it to not be able to ring , or have any online chat . Fix this and you’ll get 5 stars

frockk
Australia
About 4 years using the app
Klaviyo replied June 24, 2025

Thank you for your feedback. A member of our support leadership team is reaching out to you!

February 23, 2024

I have used several CMS apps, and Kalviyo is OKAY. It has its strong suits and it's week spots. There are a few things that are slightly annoying: You CAN NOT change transactional messaging. They put in all the information and that is it. Example: SMS message on their order ONLY send their order number. It is basically useless. They also DO NOT do abandoned cart. They say they do, but they do not. They do abandoned checkout, which they call abandoned cart. Those are just a few of the annoying things about Klaviyo.

I would say they are a mediocre app. Better than most, but still far short of being a 5 star. 3 stars, possibly 3.5.

UTKilts
United States
About 2 months using the app
January 18, 2024

Klaviyo's UI is a bit more well-designed and usable than Mailchimp. We switched in order to be able to have more flexibility for what Klaviyo calls "flows" and Mailchimp called "automations".

It's definitely not great though. There are lots of insane caveats. For example there's no way to click on a user and tell where they are in a flow. And there's no way to add more content to the end of a flow and just have it automatically go to everyone that should be sitting and waiting at the end for more.

When we test our emails with mail-tester.com they almost always get flagged with Klaviyo having an IP address in one or more blacklists. Mailchimp never had that problem.

Klaviyo also pointlessly requires a Captcha on every single login.

True Primal
United States
About 1 year using the app
Klaviyo replied January 23, 2024

Thank you for sharing your experiences with Klaviyo! We're delighted to hear that you find our UI more user-friendly than Mailchimp, especially with the flexibility of our flows. Your feedback is noted (flow improvements) and will be forwarded to our product team. If you encounter any other challenges or have suggestions, please share them with our support team. We appreciate your input as we continuously strive to improve our product. Thanks again!

PS: any new improvements are highlighted here https://www.klaviyo.com/product/whats-new

December 1, 2023

Shocked by the lack of onboarding, as this had been promised.
I find the whole platform very slow and unresponsive to the point of unusable at times.
The lack of 'support ticket ' system makes it impossible to manage help and issues.
Nobody takes ownership of issues.

Lack of outsourced specialists to code complex flows and Klavyio don't offer this as an extra.

For a program that is part owned by Shopify and designed to work with it, I don't understand how it has such traction.

Generally I am really disappointed. I will be looking for an alternative once I am further through my contract.

FrenchSoaps
United Kingdom
7 months using the app
Edited September 13, 2023

A useful app, but the support is terrible, clueless. 24/7 support is a fib. If you have an issue leading into a weekend you are stranded until Monday US time, which for me in Australia meant 4-5 days from problem Friday morning (a computer glitch) to solution Tuesday morning. An apology is fine, but some compensation would have made this bitter pill easier to swallow.

Jerry Furnell Author
Australia
11 days using the app
Klaviyo replied September 13, 2023

We appreciate your feedback, the team has reached out to help you get any issues resolved.

July 17, 2023

I have been using Klaviyo for a month now and I like the concept behind it all however there have been several glitches that I have had to contact customer services about. When I have spoken to customer services, it has taken ages to get them to understand the problem and it has been very frustrating at times. I currently have a pretty significant problem that the technical team are looking at. I will continue to use it for the time being and hope the glitches don't affect my sales and reputation as they currently have been.

The Library Ladder Company
United Kingdom
About 2 months using the app
Klaviyo replied July 18, 2023

Thanks for your review and sorry you are having some technical problems! Hopefuly they get resolved in short order.

Edited May 10, 2024

There is a learning curve to using this platform and the new rules with email have made that harder.

The first time I used this app I thought it was great, but then my account was disabled and that caused me great frustration. I tried to reach out to someone and it wasn't easy, but a real person did connect with me. She explained what was going on with my account. Thank you for helping me out.

Now, I think I'm back on track.

Joa Bath and Body
Canada
Over 2 years using the app
Edited February 23, 2026

The app is good, but it is very expensive, and they are always trying to scam more money out of you in sneaky little ways. It is designed to grow your bill over time. For example, unsubscribed and bounced emails are suppressed, but they often still sit in your total profile count unless you actively clean your database. It is very hard to mass-delete users.

Bont Skates Online Shop
Hong Kong SAR
Over 3 years using the app