# Customer.io alternatives for subscription apps

The main Customer.io alternatives for a subscription app are Whisperr, CleverTap, OneSignal, Braze and Airship. Whisperr fits if retention is the job and nobody has time to build workflows, because it decides, writes and sends each message itself. CleverTap and OneSignal are campaign tools with published prices, and Braze and Airship are enterprise platforms that publish no prices.

Updated 2026-10-20. HTML: https://whisperr.net/alternatives/customer-io-alternatives

## The alternatives at a glance

| Tool | Best for | Channels | Published pricing |
| --- | --- | --- | --- |
| Whisperr | Retention decided and written per user, without building workflows | Push and email | Free up to 1,000 users; paid from $49 a month |
| CleverTap | Analytics and engagement in one platform | Push, email, WhatsApp, in-app, web, RCS, SMS | Core $85 a month after a 30-day trial |
| OneSignal | Low-cost sending of messages you design | Mobile push, web push, email, SMS, in-app | Free plan; Growth from $19 a month |
| Braze | Large teams running many channels and campaign types | Push, email, SMS, WhatsApp, in-app and more | Not published; no free plan |
| Airship | Mobile-first brands with a mobile marketing team | Push, SMS, email, in-app, web, mobile wallet | Not published |
| Customer.io, for reference | Behaviour-triggered campaigns your team builds | Email, push, SMS, in-app, WhatsApp, LINE | Essentials from $100 a month; Premium from $1,000 a month billed yearly |

## Whisperr

Whisperr does the work a Customer.io workflow needs a person for. It reads each user's product events and subscription events from RevenueCat, Superwall or Adapty, decides whether a retention message would help, writes it for that user, and sends it by push or email through your own providers. A 10% holdout shows what it kept once each group has 200 users. [Whisperr vs Customer.io](https://whisperr.net/compare/whisperr-vs-customer-io).

## CleverTap

CleverTap pairs product analytics with engagement, so the funnel and the campaigns live in one tool. It covers WhatsApp and RCS and keeps an account-wide control group. [Whisperr vs CleverTap](https://whisperr.net/compare/whisperr-vs-clevertap).

## OneSignal

OneSignal is the cheapest way to send push, email, SMS and in-app messages you design, with a free plan and Journeys. [Whisperr vs OneSignal](https://whisperr.net/compare/whisperr-vs-onesignal).

## Braze

Braze is an enterprise platform with Canvas journeys, BrazeAI tools and a Global Control Group, at a price you get from sales. [Whisperr vs Braze](https://whisperr.net/compare/whisperr-vs-braze).

## Airship

Airship is a mobile-first enterprise platform with Predictive Churn, Optimal Send Time, holdout experiments and mobile wallet. [Whisperr vs Airship](https://whisperr.net/compare/whisperr-vs-airship).

## How to choose

- **No lifecycle team, retention is the goal:** Whisperr.
- **Analytics plus campaigns in one tool:** CleverTap.
- **Lowest cost to send what you design:** OneSignal.
- **Enterprise scale and many channels:** Braze or Airship.

## FAQ

### Why look for a Customer.io alternative?

Customer.io is flexible, but every workflow and message is something your team designs and maintains. A subscription app without a lifecycle marketer may want retention that runs without that work, or a cheaper way to send.

### Which Customer.io alternative is cheaper?

OneSignal has a free plan and Growth starts at $19 a month. Whisperr is free up to 1,000 users with paid plans from $49 a month. CleverTap Core is listed at $85 a month. Customer.io Essentials starts at $100 a month.

### Can I keep my own email provider with these alternatives?

With Whisperr, yes; it sends email through your Postmark, Resend or SendGrid account. CleverTap also uses an email provider you connect, and OneSignal can use SendGrid, Mailgun or Mandrill as an external provider.

### Do any alternatives write the messages for me?

Whisperr writes each retention message for one user, in your app's voice and their language. The campaign platforms offer AI tools that help your team draft copy.

## Sources

Checked 2026-10-20.

- [Customer.io pricing](https://customer.io/pricing)
- [CleverTap pricing](https://clevertap.com/pricing/)
- [CleverTap docs, email setup](https://docs.clevertap.com/docs/setup-email)
- [OneSignal pricing](https://onesignal.com/pricing)
- [OneSignal docs, email setup](https://documentation.onesignal.com/docs/en/email-setup)
- [Braze pricing](https://www.braze.com/pricing)
- [Airship pricing](https://www.airship.com/pricing/)