Klaviyo vs Spark Mail

Klaviyo: Email and SMS marketing for online stores, with AI that builds segments, flows and campaign copy. Spark Mail: Smart email app from Readdle with an AI writer, priority inbox and team features. Here is how they compare on features, pricing, platforms, pros and cons.

Quick verdict

Klaviyo

Best for: Online shops on platforms such as Shopify that want data-driven email.

Stands out for: Powerful store-based targeting; Strong e-commerce focus.

Spark Mail

Best for: Anyone who wants a tidy, cross-device email app with light AI help.

Stands out for: Clean design on every platform; Free plan for personal use.

Side-by-side comparison

Comparison of Klaviyo, Spark Mail
	Klaviyo Visit klaviyo.com (opens in a new tab)	Spark Mail Visit sparkmailapp.com (opens in a new tab)
What it is	Email and SMS marketing for online stores, with AI that builds segments, flows and campaign copy.	Smart email app from Readdle with an AI writer, priority inbox and team features.
Pricing	Free + Paid	Free + Paid
Free to use	Yes	Yes
Category	AI Email & Inbox	AI Email & Inbox
Editor rank	#2 in category	#4 in category
Made by	Klaviyo	Readdle
Best for	Online shops on platforms such as Shopify that want data-driven email.	Anyone who wants a tidy, cross-device email app with light AI help.
Key features	Deep online store integrations Automated flows like abandoned cart AI segments and copy help Email and SMS together	Works with most email providers Smart inbox that sorts priority mail AI writer and thread summaries Shared drafts and team inbox
Pros	Powerful store-based targeting Strong e-commerce focus	Clean design on every platform Free plan for personal use
Cons	Can get pricey as your list grows	AI features need a paid plan for heavy use
Use it to	Send an abandoned-cart reminder Target customers likely to buy again Write copy for a seasonal sale	Write a reply from a few bullet points Summarise a long email chain Snooze emails until next week
Web app
iPhone & iPad
Android
Windows
Mac