About Customer.io
Overview
Customer.io is a customer engagement platform that unifies customer data, messaging, and AI in one workspace. Teams build automated journeys across email, push, SMS, in-app messages, WhatsApp, and webhooks, then personalize each send with behavioral and relationship data. Founded in 2012, Customer.io reports that 11,000+ brands use it to power billions of customer interactions.
The AI Agent turns a single prompt into a configured automation, complete with triggers, content, timing, and logic. Teams also ask the Agent how a campaign is performing and get recommendations grounded in their own data. External AI tools connect through MCP, CLI, API, or webhooks.
Key Benefits
- Build journeys in a drag-and-drop visual workflow builder with branches, time delays, and automation triggers.
- Group people by behavior, events, and relationship data using manual or AI-assisted segment building.
- Design and version email content in Design Studio with a visual editor, code editor, and reusable components.
- Measure results through dashboards, campaign reporting, A/B tests, conversion goals, and data exports.
- Send unlimited push and in-app messages through native iOS and Android SDKs, plus React Native, Flutter, and Expo.
- Move data both ways with reverse ETL, data warehouse sync, data replay, and unlimited API calls.
How It Works
Teams import people, objects, and events through the API, SDKs, CSV import, connected forms, or a warehouse sync, then sort those profiles into segments. They assemble a journey in the visual builder, adding triggers, branches, timing, message content, and conversion goals. From there they queue a draft, launch a broadcast, and compare performance across channels before refining the next campaign.
Use Cases
- Lifecycle marketers run welcome and onboarding flows that guide new users toward their first meaningful actions.
- Retention teams watch engagement signals and churn risk, then trigger proactive winback campaigns.
- Growth and product teams personalize cross-sell and upsell messages based on real product usage data.
- Mobile teams deliver push and in-app messages through native SDKs and track in-app engagement.
- Data engineers sync warehouse data into Customer.io through reverse ETL and replay past data without new API calls.
- Enterprise marketing organizations need SSO, US or EU data residency, audit logging, and role-based permissions.
Why Choose This Product
Customer.io pairs engagement tooling with enterprise controls: SOC Tier II compliance, SSO and two-factor authentication, US or EU data centers, and audit logging with data governance on Enterprise. User seats are unlimited on every plan, and a 14-day free trial requires no credit card.
Customer.io Pros & Cons
- 14-day free trial with no credit card required
- Unlimited user seats on every plan
- Journeys span email, push, SMS, in-app, WhatsApp, and webhooks
- AI Agent builds automations from a single prompt
- Reverse ETL and data warehouse sync in both directions
- Essentials excludes data warehouse destinations and data replay
- Anonymous messages and custom roles need Premium or higher
- HIPAA compliance is not included on the Essentials plan
Key Features
Visual Journey Builder
All plansA drag-and-drop workflow builder adds branches, time delays, automation triggers, queue drafts, and conversion goals to any campaign.
Data-Driven Audiences
All plansSegments group people by custom events, nested data, and custom objects, with AI-powered and suggested segments plus ad audience sync.
AI Agent
All plansTeams describe what they want in a prompt and the Agent configures triggers, content, timing, and logic, then answers campaign performance questions.
Multi-Channel Messaging
All plansOne platform sends email, transactional email, push, in-app, SMS, WhatsApp, LINE, webhooks, and Slack messages.
Design Studio
All plansVisual and code editors build messages with reusable components, AI-generated global styles, an AI translator, and saved templates with version control.
Analytics and Testing
All plansDashboards, campaign reporting, survey analysis, A/B and multivariate testing, and conversion tracking show what each send returns.
Data Pipelines
Premium+Reverse ETL, data warehouse sync, data warehouse destinations, and data replay move customer data in and out without new API calls.
Mobile SDKs
All plansNative iOS and Android SDKs, plus React Native, Flutter, and Expo, send unlimited push and in-app messages.
Transactional Messages
API-triggered transactional sends handle password resets and order receipts, alongside scheduled or API-triggered broadcasts.
Security and Compliance
SOC Tier II compliance, SSO with two-factor authentication, US or EU data centers, and role-based permissions protect customer data.
Customer.io Pricing
View full pricing →- 5,000 profiles (people + objects)
- AI Agent with core execution skills
- 1 million emails per month
- 2 object types and 2 workspaces
- Visual workflow builder
- Email and community support
- Everything in Essentials with custom profile and email volume
- 10 object types
- Elevated Agent limits plus custom skills
- Daily Routines for scheduled tasks
- Premium chat and email support with 90-day onboarding
- HIPAA compliance
- Everything in Premium
- Priority technical support and dedicated Customer Success Manager
- Priority throughput and sending capacity
- Audit logging and data governance
- Dedicated Technical Implementation Specialist
- Shared Slack channel
| Feature | Essentials $100/mo | Premium $1000/mo | Enterprise Custom |
|---|---|---|---|
| Visual Journey Builder | |||
| Data-Driven Audiences | |||
| AI Agent | |||
| Multi-Channel Messaging | |||
| Design Studio | |||
| Analytics and Testing | |||
| Data Pipelines | |||
| Mobile SDKs |
Pricing extracted from the product website and may change. Check the source for current details.
Frequently asked questions about Customer.io
Is there a free trial for Customer.io?
Yes. Customer.io offers a 14-day free trial with no credit card required, and you can cancel anytime. Early-stage companies that have raised under $10M can apply to the Startup Program, which gives a full year of Customer.io free.
How much does Customer.io cost?
Essentials starts at $100 per month billed monthly for 5,000 profiles, 1 million emails per month, and 2 object types. Premium starts at $1,000 per month billed yearly with custom profile and email volume. Enterprise pricing is available by talking to sales.
Which channels can I send messages on?
Customer.io sends email, transactional email, push notifications, in-app messages, SMS, WhatsApp, LINE, Slack messages, and webhooks. You can combine these channels inside one automation with the visual workflow builder.
Do I pay per user seat?
No. User seats are unlimited on Essentials, Premium, and Enterprise. Pricing is based on profiles, email volume, and object types instead, with additional profiles and emails billed as add-ons.
What does the AI Agent do?
The AI Agent builds automations in a conversation, going from a single prompt to a fully configured workflow with triggers, content, timing, and logic. It also answers questions about how any campaign is performing and gives data-grounded recommendations for the next test.
Can I sync data with my warehouse?
Yes. Customer.io offers reverse ETL, data warehouse sync, data warehouse destinations, and data replay. Data warehouse destinations and data replay are available on Premium and Enterprise rather than Essentials.