Email & lifecycle analytics · Customer.io

Customer.io

Data-driven messaging platform priced by tracked profiles, with A/B and multivariate testing to measure campaign performance.

Visit Customer.io Alternatives

Customer.io is a messaging automation platform for email, SMS, push and in-app messages, built on top of customer event data rather than static lists. It offers A/B and multivariate testing plus conversion tracking as reporting features, letting teams compare campaign variants and measure downstream conversions; a zero-send control arm can approximate a holdout for lift measurement, though the product is not built around dedicated holdout-group tooling the way some enterprise platforms are. It is priced across four tiers — Essentials, Standard, Premium and Enterprise — based on the maximum number of uniquely identified profiles and objects in an account, billed annually in USD, with Enterprise adding dedicated infrastructure and support. Specific dollar amounts per tier are not published statically; they are generated through the vendor's own calculator.

At a glance

Vendor Customer.io
Pricing model Usage-based
Free tier No
Deployment Cloud
Open source No
Best for Product and lifecycle teams that want messaging tied directly to event data without buying a full enterprise CDP-plus-engagement suite.

Pricing

Priced by the maximum number of uniquely identified profiles/objects, across four tiers with annual billing; exact dollar figures are not published statically.

Pricing has not been verified yet — see the vendor's site.

Features

  • Event-triggered messaging workflows
  • A/B and multivariate testing
  • Conversion tracking
  • Cross-channel campaigns (email, SMS, push, in-app)
  • Segment builder on live customer data
  • Premium and Enterprise dedicated support tiers
  • API and data-pipeline integrations

Integrations

Profile last reviewed September 21, 2026

Alternatives

Klaviyo Ecommerce-focused marketing platform pricing by contact count, with cohort revenue and deliverability reporting built in. Braze Enterprise customer engagement platform priced by monthly active users, with Canvas holdout groups for measuring campaign lift. Mailchimp Small-business marketing platform with basic subject-line A/B testing, priced by contact count with a permanent free tier.

Customer.io in the index now

Terms to know

Cohort analysis Grouping customers by a shared starting point, such as signup month, and tracking how their behavior diverges over time. A/B testing A controlled experiment that compares two variants to measure which one produces a better outcome. Conversion rate The proportion of sessions, users, or clicks that complete a defined goal, such as a purchase or signup. Multivariate testing (MVT) An experiment that varies several page or product elements at once, to measure each element's individual effect and how elements interact.

Related guides

How to choose an email marketing platform Pick an email and lifecycle platform by what triggers a send, whether it proves lift with a holdout, and how pricing scales with your list.