I just purchased a package, but the next day I couldn't log in. It kept asking for a verification code, yet it never sent the code to my email. I've checked my inbox multiple times and still haven't received it. This experience is terrible—it's not worth the money.

Klaviyo is by far the best email marketing programme out there. Knocks the spots of some other well-known offerings that I have tried. They have taken a complicated operation and made it simple for people with no prior experience, and offer exceptional training and support. I recommend Klaviyo to everyone and find it to be one of the most useful tools in my box for increasing customer loyalty and conversions.

I've been a customer for over 4 years and I can say the support has alway been subpar but now it's terrible. I've also incurred unauthorized account charges and now they auto-sent already delivered campaigns damaging our reputation. I would seriously consider using another app for the cost alone but the lack of support really makes the decision to go elsewhere easy.

So glad we went for Klayvio - it's been easy(ish) to pick up but so simple to use everyday once once you have some experience under your belt. It's made a measurable difference to our customer engagement and sales. THANKS!

Very effective! Keeps my data organized and available for reference! Our team is able to see how to improve flow, as well as see where we are making progress.

I signed up for Klaviyo’s $20/month plan (500 profiles, 5k emails). On August 24th, I even received an official notice confirming that my $20 plan would renew on August 26th. However, Klaviyo automatically upgraded my account to a $125/month plan just because the system counted extra “profiles” that I never actively used. I only send around 5,000 emails per month — completely within the limits of the $20 plan. Yet I was told I must first pay $125 and then request a refund if I want to go back to my $20 plan. This is unreasonable and unfair. Klaviyo’s billing model is designed to trap you into higher tiers based on inflated “profile counts” rather than your actual usage. There is no option to opt out of auto-upgrade, and support refuses to prevent this from happening again. If you are a small business expecting predictable costs, be very careful. Klaviyo may automatically charge you far more than you agreed to without your approval.

Amazing, super flexible service with an outstanding support team at all times and in all situations. Thanks!

Klaviyo is extremely expensive, yet their support feels arrogant and useless. Instead of solving real issues, the support team seems focused on closing tickets with vague answers and tricks to push you away. Meanwhile, the platform creates massive problems. In our case, customers abusing discount codes and causing endless order headaches. For nearly €500 a month, this is unacceptable. Shopify Email is not only €500 cheaper per month, it also works much better.

Klaviyo is one of the best omnichannel marketing platforms I’ve used. It integrates seamlessly with Shopify and countless other platforms. It's simple yet powerful with endless ways to engage customers while following (and also training on) built-in industry best practices. The onboarding experience was excellent. Highly recommended.

I find it hard to imagine that Klaviyo, a major company, could create an app so riddled with bugs. My emails couldn't get customers to my website, a feature that even a $5-a-month email marketing app could provide. But in the eyes of Klaviyo's software engineers, this was an insurmountable obstacle. This was an unforgivable mistake. Klaviyo's new feature required me to enter my phone number before logging in. I don't understand which incompetent engineer came up with this.