UrbanAirship is a simple means of integrating Urban Airship to your iOSapplication. UrbanAirship requires Xcode 10.0+ for all projects and the static library with application solely to projects targeted at iOS10.

Pushwoosh lets you engage with customers and raise conversion rates in your applications with new digital marketing strategies. Pushwoosh combines push notifications with other communication channels to increase revenue and user LTV. A free trial is avaiable to give a better understanding via the company home page.

Layer lets you build lasting customer relationships, one conversation at a time. Layer offers executive and developer options with both tailored to suite the desired needs of the user.

Pubnub allows developers to quickly implement secure, collaborative features in a variety of realtime apps that have gained massive traction. It helps apps reflect any source of live data, from mapping, geotracking and dispatch, to broadcasting push notifications. Pubnub is available for iOSand Android apps.

Batch is a fully fledged mobile engagement platform to execute CRM tactics over iOS, and mobile websites. Batch brings Mobile engagement to new heights with high volume push notifications.

Smack is an Open Source XMPP (Jabber) client library for instant messaging and presence. Smack, a pure Java library, it can be embedded into your applications to create anything from a full XMPP client to simple XMPP integrations such as sending notification messages and presence-enabling devices.