Works with your stack

Bring your own pipes

Retainza sends through credentials you own. Connect the providers you already run, your delivery cost and sending reputation stay yours.

Push

Firebase Cloud Messaging

Retainza sends push through your Firebase project, not one it owns. You paste a service-account JSON, Retainza verifies it with a test send and stores only an encrypted reference to it.

APNs

iOS delivery runs through FCM's relay to APNs. You upload your APNs key to Firebase once; Retainza never needs a second credential.

Email

SMTP

Retainza is provider-agnostic for email. Point it at any SMTP endpoint and it sends multipart HTML and text with rate-limit-aware throttling.

SDKs

React Native

A thin wrapper over the TypeScript core. The public key is write-only and safe to ship in an app binary; rendering and navigation stay in your code.

Expo

The config plugin wires the native push setup into your Expo config at prebuild, keeping a managed workflow managed.

Node

The server SDK wraps the Management API. It uses the secret key, so it belongs on your server and never in a client bundle.