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Email marketing

Customer.io

Behavioral email, push, and SMS triggered by user events in a product or store

Good choice

Choose Customer.io if you have a developer and product events; skip it if you want simple newsletters.

This link goes to the official site, customer.io. We do not earn anything from this click.

Home page of Customer.io
Home page of customer.io on November 10, 2026. The service interface changes, and the name and logo belong to their owner.

About this service

A platform for sending messages based on user events: a visual workflow builder, email, push, SMS. Pricing starts at $100 per month for 5,000 profiles and 1 million emails. Built for teams with product data and at least basic technical skills.

What you can do with it

  • onboarding email series based on actions in an app
  • abandoned cart reminder
  • messages triggered by events from a CRM or database

Who it suits

  • SaaS
  • e-commerce
  • teams with a developer

Strengths

  • workflows based on behavior, not only lists
  • choice of US/EU data region
  • SOC 2 and ISO 27001 certifications

Limitations

  • entry from $100 per month with no free plan
  • technical skills needed for events and API
  • monthly billing by card only

Integrations

  • Salesforce
  • Shopify
  • WordPress
  • Zapier
  • Segment

Alternatives to Customer.io

  • Klaviyo

    Email marketing

    Email and SMS for online stores with segments and AI assistants

    • Free plan
    • from $20/mo
    Niche Try
  • ActiveCampaign

    Email marketing

    Marketing automation: email, workflows, CRM features

    • from $15/mo
    Niche Try
  • Brevo

    Email marketing

    Email, SMS, and WhatsApp campaigns with automation and CRM; free plan with 300 emails per day

    • Free plan
    • from $9/mo
    Good choice Try

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