What does Customer.io do?
Customer.io is a customer engagement platform that sends email, push, SMS, in-app and WhatsApp messages from behavioral data, with an AI Agent (beta) that builds automations from a chat request. Essentials is $100/mo billed monthly for 5,000 profiles. It suits product and lifecycle teams; skip it if you only send a simple newsletter.
- AI Agent (beta). Builds automations from a chat request, including triggers, content, timing and logic, and reviews campaign performance with recommendations.
- Routines and custom skills. Scheduled agent tasks (weekly on Essentials, daily on Premium) and custom execution skills, with persistent memory on every plan.
- AI segment builder. Builds audience segments from a description, with suggested segments.
- AI translator and content tools. Translates messages, generates global styles, analyzes email content and suggests in-app messages.
- Send-time optimization. Sends each message when a person is most likely to engage.
- Multichannel messaging. Email, push notifications, SMS, in-app messages and WhatsApp from one workflow.
- Data and objects. Model accounts or other objects alongside people; premium plans add data warehouse integrations.
- MCP server and LLM actions. Connect AI tools through an MCP server and call language models inside workflows.
Who is Customer.io for?
Customer.io is a good fit if you're a team lead or a website owner, and you need help sending email campaigns or automating busywork.
How much does Customer.io cost?
Customer.io starts at $100/mo. It has no free plan. Its pricing page lists a free trial. We checked this on Nov 7, 2026 on the official pricing page.
- Starts at
- $100/mo
- Free plan
- No
- Free trial
- 14 days (up to 5,000 messages)
Essentials billed monthly for 5,000 profiles and 1M emails a month; extra profiles cost $0.009 each and extra emails $0.12 per 1,000. Premium starts at $1,000 a month billed yearly; Enterprise is custom. Extra AI credits are $10 per 100K. Checked Nov 7, 2026.
Customer.io plans compared
| Plan | Billed monthly | Billed yearly | What you get |
|---|---|---|---|
| Essentials | $100/mo | Not listed | 5,000 profiles and 1M emails a month; extra profiles $0.009 each, extra emails $0.12 per 1,000; 2 object types, 2 extra workspaces; AI Agent with core skills, 3 custom skills, 1 weekly routine; email and community support |
| Premium | Not listed | From $1,000/mo billed yearly | Custom profiles and email volume; 10 object types, unlimited workspaces, premium integrations (e.g. Salesforce, HubSpot, Snowflake), elevated agent limits, 10 custom skills, 5 daily routines; 90-day onboarding support |
| Enterprise | Custom | Custom | Custom pricing on a yearly term; best pricing on volume, custom agent limits, priority technical support, optional dedicated Customer Success Manager |
Checked on Nov 7, 2026 from a US-based fetch of customer.io/pricing. Essentials is billed monthly and Premium yearly; extra emails cost $0.12 per 1,000 on every plan and extra AI credits $10 per 100K on Essentials and Premium. The 14-day trial is limited to 5,000 messages, per Customer.io's plan-features doc (updated Oct 19, 2026). Startups that raised under $10M can get a year free through the Startup Program.
Checked Nov 7, 2026 on Customer.io's pricing page. Prices change often, so confirm before you buy.
Customer.io pros and cons
What stands out
- AI Agent that builds automations from chat requests
- Email, push, SMS, in-app and WhatsApp in one platform
- Clear Essentials price with published overage rates
- 1M emails a month included on Essentials
- 14-day free trial and a startup program
Watch out for
- Starts at $100/mo, high for small newsletters
- Premium starts at $1,000/mo and needs a yearly term
- AI Agent is still in beta
- Premium integrations such as Salesforce and HubSpot need Premium
- Trial is capped at 5,000 messages
- Extra AI credits cost $10 per 100K
Based on Customer.io's own pages, not hands-on testing.
What are the alternatives to Customer.io?
We list 9 other AI Email Marketing tools: ActiveCampaign, AWeber, Brevo, Campaign Monitor, GetResponse, Keap, Kit, Moosend, Sender. Each one below shows its starting price and when you might pick it instead.
ActiveCampaign · From $15/moChoose ActiveCampaign if you want a lower starting price ($15/mo vs $100/mo).
Campaign Monitor · From $13/moChoose Campaign Monitor if you want a lower starting price ($13/mo vs $100/mo).
GetResponse · From $15.58/moChoose GetResponse if you want a lower starting price ($15.58/mo vs $100/mo).
Keap · From $320/moChoose Keap if you'd like a second option to compare for sending email campaigns.
Moosend · Price not checkedChoose Moosend if you'd like a second option to compare for sending email campaigns.
Customer.io FAQ
How much does Customer.io cost?
As of Nov 7, 2026: Essentials is $100/mo billed monthly for 5,000 profiles and 1M emails. Premium starts at $1,000/mo billed yearly; Enterprise is custom.
Does Customer.io have a free plan?
No permanent free plan. There's a 14-day free trial, limited to 5,000 messages, and a Startup Program with a year free for companies that raised under $10M.
What does the Customer.io AI Agent do?
It builds automations from a chat request, covering triggers, content, timing and logic, and reviews campaign performance with recommendations. It's labeled beta.
What other AI features does Customer.io have?
An AI segment builder with suggested segments, an AI translator, AI-generated global styles, email content analysis, in-app message suggestions, send-time optimization, LLM actions and an MCP server.
What happens if I go over 5,000 profiles?
On Essentials, extra profiles cost $0.009 each, and extra emails beyond 1M cost $0.12 per 1,000.
What channels does Customer.io support?
Email, push notifications, SMS, in-app messages and WhatsApp.
What's the difference between Essentials and Premium?
Premium adds unlimited workspaces, more object types, premium integrations such as Salesforce and Snowflake, higher agent limits, daily routines and onboarding support, on a yearly term.
Who is Customer.io best for?
Product, growth and lifecycle teams at software and B2C companies that send messages triggered by user behavior. Small newsletters will find Sender or AWeber cheaper.
Sources and how we checked
- Official pricing page, checked Nov 7, 2026
- Official website
- Customer.io plan features doc, updated Oct 19, 2026 (read Nov 7, 2026), checked Nov 7, 2026
- Customer.io homepage: channels and AI Agent (read Nov 7, 2026), checked Nov 7, 2026