Klaviyo vs Mailchimp vs Customer.io: When Each Wins
Klaviyo: DTC ecommerce
Best Shopify integration, strongest flow builder, biggest ecosystem of pre-built templates. For DTC, it's the default.
Mailchimp: SMB and creators
Cheapest, easiest setup, best for newsletters and very small ecommerce. Graduates to Klaviyo above $5k/month revenue.
Customer.io: B2B SaaS
Best for event-based, API-driven messaging. Trigger emails off product behavior at scale. Harder setup, better for technical products.