Customer.io
Customer.io is a customer engagement platform for creating personalized journeys across email, push, SMS, and in-app messaging.
Our verdict
Customer.io is a customer engagement platform for creating personalized journeys across email, push, SMS, and in-app messaging. No free tier is advertised, though pricing is at least public. Developer documentation and a public changelog are both maintained, which is a good sign for anything you intend to build on. We have not verified the prices by hand, so we do not quote them here. Everything above was checked on 2026-09-14.
Reviewed by AI Review Rating desk review How we score
Pricing
Read automatically from customer.io. Prices change; the vendor’s page is authoritative.
| Tier | Monthly | Includes | Seats |
|---|---|---|---|
| starts at | $100 | ||
| starts at | $1,000 |
What users actually say
- What sucks about customer.io? Reddit · 2025
- Ortto vs Customer.io Reddit · 2024
- Encharge vs Brevo vs Ortto vs Customer.io Reddit · 2025
- Customer engagement management tool you like? Reddit · 2025
We link to discussions rather than reproducing them. Opinions belong to their authors.
User reviews
No one has reviewed Customer.io here yet. Reviews are moderated before they appear, and our own score is editorial and separate from user ratings, though once reviews land they do lift it.
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Questions
Is Customer.io free?
We found no free tier or trial advertised on Customer.io’s own site. Check the vendor’s pricing page, since this can change.
How much does Customer.io cost?
Customer.io publishes pricing on its own site, listing 2 plans. We deliberately do not republish prices we have not verified by hand, because automated price extraction proved unreliable enough to mislead. Use the link on this page for current figures.
Does Customer.io have an API or developer docs?
Yes, Customer.io publishes developer documentation.
How is Customer.io scored here?
Customer.io scores 5 out of 10. That comes from a desk review of public evidence, which is capped at 8.5 out of 10: public pricing, documentation, maintenance signals and how much we could actually verify. Affiliate relationships are excluded from scoring entirely. The full rubric is published on our methodology page.