Retainza

Engagement and retention for Email, Push & In-App

by Shanna Huel

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Nov 4, 2026 Marketing & Sales

email marketing engagement in-app-messaging push notifications retention

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About

Retainza is a developer-first engagement and retention platform, Email, Push and In-App messaging over your own FCM and SMTP, so you keep control of deliverability and cost. An alternative to OneSignal and Braze.

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