SparkChat

SparkChat is a secure team communication app that enables teams to be more productive. You can securely collaborate with your team members, vendors, agencies and business partners without ever (necessarily) giving your number away so you keep you work and personal communication separate. Manage tasks, share all your files and share knowledge one to one, in groups or in open chatrooms. The app can be used free for an unlimited number of users for an unlimited amount of time, with features including: 1-1, Group and Chatroom Messaging File sharing across any format (Spreadsheets, Word docs, presentations. Etc) Free Native apps for Android, iOS and Web Task Manager You can even upgrade to the professional plan with features such as an admin panel, unlimited search across all archives, priority support and the option of hosting the app on your own servers.