Customer.io
Self-serve customer engagement platform for data-driven email, SMS, push, and in-app messaging automation.
Last verified:
Customer.io is a customer engagement and messaging automation platform built around a profile/object data model, letting teams build cross-channel campaigns and journeys triggered by real-time behavioral and event data. Unlike most enterprise marketing automation vendors, it offers transparent self-serve pricing based on profile volume with credit-card checkout for its Essentials, Standard, and Premium tiers, reserving sales contact only for its Enterprise tier. Founded in 2012 and historically bootstrapped, Customer.io is a remote-first company that has built a reputation as a product-led, developer-friendly alternative to Braze and Marketo.
Pricing
| Tier | Price | Key features |
|---|---|---|
| Essentials | Custom | Self-serve signup, credit card checkout, Data-driven email/SMS/push messaging, Core journey builder |
| Standard | Custom | Scaling across more channels, Expanded workflow features |
| Premium | Custom | Custom workflows, Advanced segmentation and reporting |
| Enterprise | Custom | Custom profile/email volume and pricing, Dedicated support, Invoice billing (ACH/Wire) |
Source: https://customer.io/pricing/
Agent-readiness
- Discoverability
- 85/100
- Machine-readable content
- 80/100
- Programmatic access
- 85/100
- MCP / agent support
- 15/100
- Self-serve transactability
- 80/100
- Transparency
- 75/100
Security & compliance
- SSO / SAML
- Yes
- Encryption at rest
- Yes
- Encryption in transit
- Yes
- Audit log
- Yes
- Pentest report
- Not publicly documented
"Not publicly documented" means Crail found no public evidence either way — not a confirmed absence. See our methodology. Trust center: https://customer.io/security/.
FAQ
Does Customer.io have a free tier?
No — Customer.io does not offer a free tier as of 2026-07-26.
Can you buy Customer.io without talking to sales?
Yes, Customer.io can be purchased self-serve without a sales call.
Does Customer.io have an official MCP (Model Context Protocol) server?
Not as of 2026-07-26 — no official MCP server was found.
What compliance certifications does Customer.io hold?
Customer.io holds: SOC 2 Type II, ISO 27001, HIPAA, GDPR.
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Methodology & disclosure
Data verified via agent crawled, last checked 2026-07-26. Agent-readiness methodology version crail-ar-v0.1. No vendor payment influences these scores — see our methodology page.