Customer.io
Sends messages across email, push and SMS triggered by what a customer actually does in your product, with AI generating the journey logic.
What it costs
| Tier | Price | For | Includes |
|---|---|---|---|
| Essentials | From $100/month | A small company gaining momentum that needs data-driven, behaviour-triggered messaging. | 5,000 profiles, 1M emails/month, 2 object types, basic integrations, email and community support. |
| Premium | From $1,000/month | A company growing rapidly across multiple messaging channels. | Unlimited push and in-app messaging, daily routines, premium chat and email support, 90-day onboarding, HIPAA compliance, premium integrations. |
| Enterprise | Custom pricing | An organisation scaling to dedicated infrastructure needs. | Dedicated hardware, custom profile and email volume, elevated support with a 2-hour first-response SLA. |
Read from Customer.io's own pricing page on 25 Sep 2026. Vendors change prices without notice.
Where it breaks
Overage beyond a plan's included volume is billed per unit: $0.009 per additional profile and $0.12 per 1,000 additional emails. A business with volatile or growing user counts should model overage cost, not just the base plan price.
First entry in this reference. There is no previous check to compare it against.
Customer.io’s category is lifecycle messaging: emails, push notifications and SMS triggered by what a customer actually does — signs up, abandons a cart, hits a usage limit — rather than a static newsletter send. The AI layer helps generate the journey logic itself, suggesting the sequence of messages for a given trigger rather than making you build the flow node by node.
The jump from Essentials to Premium is steep — $100/month to $1,000/month — and it’s less about email volume than about channel breadth: Premium is where unlimited push and in-app messaging, HIPAA compliance, and premium support arrive. A company sending email only, with modest volume, has no reason to pay for Premium’s channel breadth.
What “from” means here
Both published prices are starting figures — actual cost scales with your profile count and email volume beyond the included allowance, at $0.009 per extra profile and $0.12 per 1,000 extra emails. For a fast-growing product, that overage can compound quickly; model your expected profile growth over the contract period, not just today’s count.
Where it fits
This is downstream of your product’s usage data, not a marketing-content tool — it needs an event stream or CRM data feeding it to trigger anything. Pair it with your product analytics or CRM as the data source; Customer.io is the delivery and sequencing layer on top, not where the customer data originates.
Get Customer.io
Buying the tool is not the hard part.
The ebook is about what to hand over, in what order, and how you find out when it goes wrong. One payment, no subscription.