Question: I'm looking for a service that allows me to create immersive online experiences with features like in-app chat, push notifications, and location sharing.

If you want to build immersive online experiences with in-app chat, push notifications and location sharing, PubNub is a good option. It's a full featured real-time communication platform that includes chat, push notifications and location sharing. PubNub has more than 800 million connected devices and 3 trillion API calls per month, and it's got strong security. It also offers real-time decisioning, AI integration and no-code tools for managing users and data.

Another contender is Ably, a real-time digital experience platform that can handle live chat, data broadcasting, synchronization, multiplayer collaboration and GPS location sharing. Ably boasts high availability, 99.999% uptime, and compliance with major regulations. It supports several programming languages and has a free tier, so it can be used for a variety of applications, including EdTech, FinTech and more.

If you need something that can handle large volumes of traffic, Stream is a fast API for building social networks, activity feeds and chat apps. It includes a Chat Messaging API with offline support, an Activity Feeds API with real-time updates, and a Video & Audio API with strong security. Stream's documentation and UI kits make it easy to integrate and customize, and it has several pricing tiers to fit different needs.

Last, Tencent RTC offers a powerful real-time communication platform for video and voice calls, chat and conference. It works on multiple platforms and is designed for global availability and low latency. With a pay-as-you-go pricing model and flexible pricing tiers, Tencent RTC can be used in a variety of industries, from social entertainment to healthcare.