Klaviyo
email
AI-powered email, SMS, and marketing automation for B2C brands.
Pricing
Free plan
Rating
—
Votes
0
Head-to-head comparison
Klaviyo vs Customer.io
Compare Klaviyo and Customer.io side by side across pricing, features, ratings, pros, cons, best-fit use cases, and alternatives.
Customer.io
email
Behavioral, event-driven messaging automation across email, push, and SMS
Pricing
Paid
Rating
—
Votes
0
Feature comparison
Feature
Klaviyo
Customer.io
Category
email
email
Pricing
Free plan
Paid
Free plan
API access
Mobile app
Browser extension
Team collaboration
Custom training
Self-hosted option
Offline mode
Multi-language support
Klaviyo pros and cons
Powerful unified customer-data model
Deep e-commerce integrations, especially Shopify
Robust email and SMS automation flows
Useful predictive analytics and AI content
Costs scale quickly with active profiles
AI add-ons (Composer, Customer Agent) metered separately
Can be complex for small or simple senders
Customer.io pros and cons
Powerful real-time behavioral triggers
Advanced segmentation and workflows
Multi-channel: email, push, SMS, in-app
Robust API and data integrations
Higher starting price than basic email tools
Priced by stored profiles, not sends
Steeper learning curve
Which one should you choose?
Best overall signal
Klaviyo
Selected using Toolglade popularity signals such as views and votes.
Best value signal
Klaviyo
Selected using free-plan availability and engagement signals.
Best for
Klaviyo
- e-commerce email and SMS
- behavioral automation flows
- predictive customer analytics
- Shopify brands
- E-commerce and DTC brands
Customer.io
- SaaS companies
- product-led teams
- lifecycle marketers
- SaaS companies
- product-led teams
FAQ
Is Klaviyo better than Customer.io?
It depends on your use case. Compare category fit, pricing, feature availability, and ratings before choosing.
Which tool has a free plan?
Klaviyo and Customer.io may not offer a free plan based on current Toolglade data.