vioscale
Comparison

Customer.io vs Klaviyo

No clear leader: Klaviyo (48.8) and Customer.io (47.5) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

Customer.io full profile →Klaviyo full profile →
Machine formatsJSONMarkdownGraphQLor send Accept: application/json
Customer.io48
Klaviyo49
Score
Vioscale score
Customer.io48 / 100medium · 58%
Klaviyo49 / 100medium · 53%
Pricing
Free tier
Customer.io✗
Klaviyo✓
Model
Customer.iocommercial
Klaviyofreemium
Price level
Customer.iounknown
Klaviyolow
Transparent
Customer.io✗
Klaviyo✗
Integrations
Count
Customer.io6
Klaviyo3
Security
Disclosure policy
Customer.io✓
Klaviyo–
Gdpr
Customer.io✓
Klaviyo✓
Hipaa
Customer.io✓
Klaviyo–
Soc2
Customer.io✓
Klaviyo–
Reliability
Status page
Customer.io✓
Klaviyo✓
Market
Availability

Capabilities

Feature-by-feature on the axes that matter for marketing automation software. “-” means undocumented, not absent.

Pricing
Transparent published pricing
Customer.io✗
Klaviyo-
Free tier
Customer.io✗
Klaviyo-
Pricing unit
Customer.io-
Klaviyo-
Orchestration
Visual journey / workflow builder
Customer.io✓
Klaviyo✓
Lead management
Lead scoring
Customer.io✗
Klaviyo-
Channels
Multichannel beyond email
Customer.io✓
Klaviyo✓
Web / on-site personalisation
Customer.io✓
Klaviyo✓
Ads audience sync
Customer.io✓
Klaviyo-
Integrations
Native CRM sync
Customer.io✓
Klaviyo-
Data
Built-in CDP / event data
Customer.io✓
Klaviyo✓
Optimisation
A/B / multivariate testing
Customer.io✓
Klaviyo✓
Segment
Lifecycle focus
Customer.ioBoth
KlaviyoB2C
Deployment
Self-hostable
Customer.io✗
Klaviyo✗
AI
AI (send-time / content / predictive)
Customer.io✓
Klaviyo✓

What each one is

The product in its own terms, so the numbers below have context.

Customer.io

An AI-powered customer engagement platform that combines data, messaging, and automation to deliver personalized interactions at scale. Trusted by over 9,000 brands to orchestrate campaigns across email, SMS, push, in-app, and web channels with advanced segmentation and real-time behavioral triggers.

Independently observed

Klaviyo

A unified platform that combines email, SMS, WhatsApp, and other messaging channels with customer data management and AI-powered automation to help consumer brands build lasting relationships and drive revenue.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Customer.io

from $100/moSubscription14-day trial

From $100/month. 14-day free trial; 12-month free for qualifying startups.

  • Essentials$100/month, billed monthly
    • 5k profiles (people + objects)
    • AI Agent with core execution skills
    • 1 million emails per month
    • 2 object types
    • Visual workflow builder
    • +3 more
  • Premium$1,000/month, billed annually
    • Everything in Essentials
    • Custom profile volume & pricing
    • Custom email volume & pricing
    • 10 object types
    • Elevated Agent limits + custom skills
    • +5 more
  • EnterpriseContact sales
    • Everything in Premium
    • Custom pricing on profile & email volume
    • Custom Agent limits + execution skills
    • Priority technical support
    • Migration support
    • +6 more
as of verify ↗

Klaviyo

SubscriptionFree tier

Free plan available. Paid tiers with promotional pricing available.

  • FreeFree
    • Up to 250 profiles
    • 500 emails/month
    • $5 of mobile messages/month
    • 10,000 Composer credits
    • Built-in reporting
    • +3 more
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
Customer.io✓
Klaviyo✓
iOS
Customer.io✓
Klaviyo✗
Android
Customer.io✓
Klaviyo✗
Deployment
Cloud / SaaS
Customer.io✓
Klaviyo✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Customer.io

6 total
  • Salesforce
  • Meta Ads
  • Facebook Ads
  • Instagram Ads
  • Google Ads
  • YouTube Ads
Independently observed

Klaviyo

3 total
  • Figma
  • Shopify
  • Instagram
Independently observed

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.