Klaviyo powers smarter digital relationships. We make it easy for B2C businesses to transform all their data into more valuable customer experiences across every touchpoint — from email and SMS to web and reviews. More than 157,000 businesses rely on Klaviyo to grow their revenue faster and more efficiently.
Klaviyo (klaviyo.com) has 355 customer reviews on Five Star Index, with an average rating of 2.6 out of 5.
Also known as
klaviyo.com
Website
klaviyo.com
Category
Sales & Marketing
Location
Boston, Massachusetts
Listed on Five Star Index
2026
About these reviews
Replies
The company replied to 61% of reviews.
Latest
Most recent review: October 2026.
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Reviews are shown as their authors wrote them. The company can reply, but cannot edit them.
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Since the day when Klaviyo was rising their prices extremely high I decided to cancel it. Now after almost 2 years I activated it suppressed almost all emails I they force me to pay at least $720 monthly. Thats nonsense - Klaviyo will pay for it the hard way.
HJ
Hugh J. L.
This JUNK software clobbered my…
This JUNK software clobbered my WhatsApp app, and then told me I had to contact Meta to solve the problem. The Klaviyo support person was not just clueless, they were down right rude. I would never recommend this software.
JB
Jim B.
Shocking
Shocking. Absolutely shocking. My account was suspended out of the blue, with no warning, no explanation, and no support.
I’ve spent hours crafting newsletters, building campaigns, and hundreds of pounds on social ads to grow my audience... and Klaviyo just nuked it all in a second.
I’ve done nothing wrong. No spam, no violations, no shady behaviour. My campaigns were entirely legitimate, yet my account, and my business communication, was halted instantly.
Customer service has been near nonexistent. Automated messages, no timelines, no clarity. The entire experience is infuriating and unprofessional.
If you run a business and value your time, your work, and your customers, do not trust Klaviyo. One day they’ll just delete everything you’ve built without reason, and there’s nothing you can do about it. One star is far too generous for this.
CM
Christian M.
Outdated software that is going to get…
Outdated software that is going to get buried by newer tools. Just use shopify email marketing. Terrible UI, lost 60 emails that should have gone out to new paying customers. I wouldnt use it even if they paid me.
SD
Sem D.
I had an issue with payments and…
I had an issue with payments and contacted Klaviyo in a polite and timely manner. I was told the issue would be resolved and that I would be connected with a specialist who would take over the case.
After that: complete radio silence.
Despite sending multiple follow-up emails, I received no response at all.
When I later tried to log into my account, I discovered that it had suddenly been deactivated. Again, I sent several emails asking for an explanation — once more, no reply.
Only after I reached my limit and decided to email all available Klaviyo contact addresses did I finally receive a response — the very same evening. That alone is already quite strange.
And then, suddenly, I was told that my “content, industry or practices” were allegedly in conflict with Klaviyo’s policies. This came as a complete surprise. I never received any warning, notice, or prior communication about this. No explanation, no chance to fix anything — just an account blocked without any due process.
This is especially frustrating because I invested a significant amount of time and effort into building my email flows. My entire email marketing setup was effectively wiped out without warning or proper explanation.
I have since sent another email requesting a detailed clarification, but I am not optimistic that this will lead to a solution.
Overall, I strongly discourage using Klaviyo. Their communication is extremely poor, and it appears that major decisions are made abruptly and without transparency. Based on my experience, I would not recommend signing up with Klaviyo at all.
DB
Daniel B.
Poor Customer Service
I recently transferred my Klaviyo account to a new owner, expecting the billing to stop on my end. Unfortunately, I’m still being charged even though I no longer have control over the account. The process for resolving this issue has been unclear and time-consuming, and I haven’t received a satisfactory resolution. This experience makes me question Klaviyo’s account management and billing practices. I would not recommend Klaviyo unless they improve transparency and support for ownership transfers.
NH
Nickolas H.
Unauthorized charge
Klaviyo charged my business debit card for $30.00
I never signed up for any free trial or subscription.
I tried to reach this company through their site's help center, sales, customer support but got nowhere.
Worst part is, how did they acquire my cards credentials!!!
STAY AWAY FROM THESE PEOPLE