Flock is considered one of the best solutions for team communication when it comes to the easy-to-use interface. The app has gained popularity for its highly productive features and frequent updates. Though the app has almost doubled its price, the features are still quite amazing. 

Despite the huge list of alternatives, Flock stands its ground very solid. The features are set by absolutely no means meager. The prices are known to hike proportional to the services.

Slack, on the other side, has worked quite intuitively on its core features while Flock has not. With the ever-growing competition, Flock will have to add new features and tons of integrations to make it work in the long run.