The best alternatives to Protonet are Balloon, Pixave, and Scaleway. If these 3 options don't work for you, we've listed a few more alternatives below.
Mitter helps businesses build web and mobile messaging solutions. For example, it can create a customised version of WhatsApp for service support, sales and feedback, among other things, in a few weeks’ time. “...
V3! New Features! 🎉🍾🍻 Slack Deletron uses the Slack API to help you search, manage and delete files from your Slack Workspace. We save nothing (seriously) and only help you get rid of stuff