If you're looking for an alternative to Reality, Wikitude Augmented Reality could be a good option. It's a cross-platform AR SDK that lets developers create immersive AR experiences for iOS, Android and Smart Glasses. Wikitude has a number of features like Geo AR for location-based experiences, Instant Tracking and support for Unity and native APIs, making it a good option for a variety of industries like retail, education and entertainment.
Another option is Beamable, a service for rapidly developing and launching online games and virtual worlds. Beamable is built with a serverless design using microservices and supports Unity and Unreal Engine. It has live operations, events and leaderboards tools, which could be good for developers who want to add game elements and content.
Hololink is another AR platform that lets agencies and brands create custom AR experiences. Its AR editor is designed to be easy to use, and features like product visualization, GPS integration and analytics can help conversions and engagement. It's geared for marketing games, product visualization and in-store experiences.