Klaviyo vs Customer.io

Klaviyo is one of the best email marketing tools for e-commerce stores, especially if you want to build out things like different sales sequences, upsells, or abandoned cart flows.

Klaviyo gives you templates that are based on best practices from across the e-commerce space, which is why they tend to perform well. When speaking to friends in the e-commerce space, they all said they use Klavyio, it’s pretty much become the default tool e-commerce stores rely on.

While Klaviyo started as only email marketing flows, they now call themselves a B2C CRM where your customer data, messaging, and automation all live in one place. That’s what allows you to personalize flows based on real behavior (e.g. you can email someone if they added a product to their cart and didn't check out, or send them an email sequence if they haven't re-purchased in the past 60 days. Klaviyo also seems to be better than Shopify for A/B testing these flows.).

Customer.io is great for building segmented onboarding funnels within your product (e.g. a series of emails and push notifications based on the onboarding flow).

It allows you to manage all of your communication flows with the customer in a visual way.

We've been seeing more and more companies switch over to this due to their flexibility of native integrations.

You can also do things like push app sign-ups and in-app events to a shared channel in Slack, or even use it to automatically push out updates to shared Slack Connect channels.