Couple of companies come to mind: * Realm.io has successfully positioned themselves as a thought leader in swift development for iOS by producing solid blog co

Couple of companies come to mind: * Realm.io has successfully positioned themselves as a thought leader in swift development for iOS by producing solid blog content and leading the Swift SF meetups (+ contributing to open-source projects). * Crashlytics/Fabric.io is more interesting -- my experience with them has been entirely word-of-mouth (but they have a big presence at Twitter's developer conference/WWDC/Google IO, too). * Parse generally has interesting, high-quality technical blog content: (https://blog.parse.com https://blog.parse.com).