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
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The company replied to 61% of reviews.
Latest
Most recent review: October 2026.
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I never write reviews, but please do not use Klaviyo! Not only is it a rip-off, but nobody at the company has any idea how their software works. They'll give you the run around and expect you to hire someone to fix the technical issues that their own software has. Absolutely horrible experience!
MA
Mansar
Je suis désinscrite de cette société et…
Je suis désinscrite de cette société et ils continuent de m'envoyer 3 mails par jour. J'ai signalé au registrar comme mails abusifs.
MP
Morten P.
What an absolutely shitty customer…
What an absolutely shitty customer service! They keep increasing their prices as customers service gets crappier by the day. You have to wait a long time to even get in contact with someone BY F... MAIL! And then they cant really do anything for you except direct you to links where you can try and figure out the problem yourself. Im currently locked out of my own f... account, because I cant receive SMS on the phone that is connected to the account and Klaviyos shitty system does not offer an alternative for me to use. So Im defacto locked out of my own f... account BY KLAVIYO, who IM PAYING MONEY EACH MONTH!!!
DB
David B.
Klaviyo is a scam
Klaviyo is a scam. They had a rep, a Julie D. from the sales department contact us about setting up emails for our company. We had over $35k emails which cost over $800+ for just one month. I was promised an onboarding, Julie told me someone was going to call me and help me setup and show me exactly how to make the $800+ work out in my favor to a value of a possible 30x ROAS. I never received any call. I never got any reasonable order from the emails sent via Klaviyo. Total orders was less than $100. The flows barely yielded 10% of the ridiculous $800 I paid for one month. I reached out to Julie, she said she will respond but never did. I will never recommend them. We have done way better just using our shopify emails for less than $10 a month. Klaviyo is definitely a scam. They lie about how efficient their flows are but you are better off just using regular emails.
JE
Jens
From $39 to over $200 a month — overnight.
⸻
Going from $39/month to over $200/month overnight due to a change in business model is unacceptable.
We send maybe two campaigns a month, yet under the new model you get charged simply for storing a profile — even if you never email them.
On top of that, there are persistent bugs with abandoned emails that we’ve tried to resolve multiple times with their so-called “support,” but without success.
GR
Gregory
Shocking support
Shocking support - long delays as the chat person seems to toggle through multiple support chats. doesn't give fully articulated instructions, comment are piecemeal which makes the whole process ineffective, annoying and overly time consuming. Do not subscribe to Klaviyo - worst tool ever.
JR
james R.
while klaviyo has a good app epxect to pay much more than what you think you will. the billing process is obscure and it is leveraged to always go up
while klaviyo has a good app it is really difficult to manage costs. They work hard to increase subscriber numbers which is good but then it is really difficult to pare them down in time for the auto subscription charge Charges automatically go up with subscriptoins but do not go down I have yet to figuer out how they go down Also Klaviyo is the one calculating the number of customer so that is perhaps asking your customer how many pancakes did you use. as the subscriptoin fees ratchet up quickly with subscriber counts it gets expensive
KS
Klaviyo S.
Klaviyo is trash
Klaviyo is trash. They force paying customers to keep spam profiles active because they only allow you to suppress a profile (the allowance to choose to not email a profile) once every 90 days. So bots keep signing up, we keep suppressing those sign ups, only for these bots to re-sign up. When they do that, we can’t re-suppress them for THREE MONTHS. Now mind you, Klaviyo charges a subscription PER ACTIVE PROFILE. I escalated my request to surpass the 90-day restriction, and you know what they said? “wE cAnT dO tHaT!!1 pEOpLe WiLL dEaCtiVaTe pRoFiLeS bEfOrE BiLLinG dATe aNd rEaCTiVaTe tHeM aNd wE’ll LoSe MoNeY!!!111”. Awww someone think of this poor 8 BILLION DOLLAR company! They want YOU, business owner, to lose money by paying them to keep spam profiles active instead! Not them! They will actually MAKE UNDESERVING MONEY because you anre forced to keep paying for SPAM ACCOUNTS! That’s why they won’t solve your problem. They profit off of it! ABSOLUTE GARBAGE COMPANY, stay away!!!
P.S: if they respond saying you can add double opt-in, that is a botched solution that DOES NOT SOLVE THE ISSUE, and only adds obstacles for legitimate sign ups, meaning their solution WILL make your business suffer. You’ll get fewer sign ups, add one extra unnecessary hurdle to you getting new customers, AND DOESN’T STOP BOTS. Klaviyo, I hope your competitors read this and crush you out of existence.