Reviews (3,396)

Overall rating
4.7
Counts per rating level
  • 88% of ratings are 5 stars
  • 2% of ratings are 4 stars
  • 1% of ratings are 3 stars
  • 1% of ratings are 2 stars
  • 8% of ratings are 1 stars
All reviews
October 15, 2026

I have been using Klaviyo for a few years now, and using their Review app as well. About 3 months ago we found out that Klaviyo was inserting an extra script on our website causing it to be slower. For 3 months they didn't solve the issue, claimed we had hardcoded on our site and some other claims that had nothing to do with the issue. After pressuring the team to investigate this, it turned out their own Review app was causing the issue. Even when it is their own error they expect us to fix it and spend time on fixing it. We sent them an email nearly a week ago requesting them to fix the issue, no reply. Follow up email no reply! Third email, no reply. Never thought I would be giving Klaviyo such a bad review but it really shows the "respect" they have for their customers! Unbelivable disrespect to paying customers! But here you go Klaviyo, your behavior towards your customers is absolute shit! Could not be unhappier as a customer for several years! Please spare me with your standardized bullshit reply! You had days to get back to us, so a reply of a member will reach out to you is worthless!

Ludus
Iceland
Almost 6 years using the app
Klaviyo replied October 16, 2026

We sincerely apologise for the frustrating experience and are committed to making this right - a member of the Support Leadership team has reached out to you directly.