NotifySphere replaces 3-4 separate vendors — OneSignal for push, Branch for attribution, Zendesk for support — with one SDK. ✅ Push notifications across iOS, Android & Web ✅ Two-way WhatsApp Business API messaging ✅ OneLink deferred deep linking & attribution ✅ Built-in in-app customer support ✅ Drop-in SDKs for React Native & Flutter One dashboard, one integration, one customer record — instead of stitching together separate vendors for every channel.