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Customer.io

Customer Engagement Platform For Better Outcomes

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Customer.io is a customer engagement platform that unifies first-party data, messaging, and AI so teams can build personalized, cross-channel experiences. It addresses the need to orchestrate campaigns across email, mobile, push, in-app, SMS, WhatsApp, LINE, and webhooks from a single place, reacting to customer behavior in real time.

Core modules include Journeys for multi-step cross-channel workflows, Audiences for real-time behavioral segmentation, Design Studio for message creation with Liquid personalization and AI translation, and Analytics with conversion tracking, A/B and cohort testing, and AI-powered insights. Data & integrations supports warehouse sync, custom objects, APIs, SDKs, webhooks, and connections to tools such as Snowflake, Segment, Salesforce, HubSpot, Amplitude, Mixpanel, Google Ads, and Twilio. An AI Agent builds automations from prompts, drafts content, and analyzes performance, with access via MCP server, CLI, API, and webhooks.

Customer.io is aimed at marketing, lifecycle, and growth teams, as well as developers and AI agents. It is packaged in three editions: Essentials, Premium, and Enterprise, with profile- and email-volume-based limits that scale by plan. A 14-day free trial is available, and a Startup Program offers a free year for early-stage companies under a funding threshold.

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