The 15 Coolest Collaboration Apps Of 2021: The Mobile 100

Mobile apps from leading collaboration software makers and unified communications vendors offer video and audio conferencing, chat and messaging, screen sharing and file sharing, and more on mobile devices.

Coolest Collaboration Apps

To enable the remote and mobile workforce in 2021, collaboration apps are a must-have. Mobile collaboration tools have exploded in popularity during the COVID-19 pandemic as a way to keep teams connected, and keep businesses running. Leading collaboration software makers such as Microsoft Teams, Zoom, Slack and Cisco Webex all offer mobile versions of their apps with much of the functionality of the desktop versions. Meanwhile, many unified communications firms also offer mobile collaboration apps with features for video and audio calling/conferencing, chat and messaging, screen sharing, file sharing and more. And, makers of leading project/task management apps also offer powerful versions of their software for mobile devices, as well.

As part of CRN’s Mobile 100 for 2021, we’ve rounded up 15 cool collaboration apps to know about.

8x8 Wor‪ k

The 8x8 Work mobile app brings together cloud phone functionality along with chat, HD video conferencing, meeting recording, directory services and other capabilities. The app also integrates with the desktop version of 8x8 Work.


The Box app enables users to store and manage files using any mobile device. Collaboration features include secure editing and sharing of documents over mobile. Meanwhile, the Box Capture app takes document scans, photos and videos and automatically saves them to the cloud.

Cisco Webex Meetings

The Cisco Webex Meetings collaboration app enables participation in Webex video and audio meetings via mobile devices. Key features include one-tap meeting joining from your calendar, content sharing, screen sharing and virtual backgrounds.


The Dropbox mobile app enables file uploading to the cloud and file sharing, as well as backup/sync for documents, photos, videos and other files. Mobile features include automatic uploading of photos and videos to cloud storage, simplified sharing of large files using a link and scanning of documents with your mobile device.

Fuze Mobile

The Fuze Mobile app combines voice calling and video meetings with chat messaging, content sharing and contact center. Capabilities include four-digit extension dialing, the ability to take multiple calls simultaneously, contact center agent queues and a “quiet mode” for disconnecting outside of work hours.

Intermedia Unite

With the mobile app version of Intermedia Unite, users get capabilities for placing and receiving calls from their work number on their mobile device. Key features include voicemail, team chat and messaging, call recording (when enabled) and “call flip” between mobile and desk phones during a call.

Microsoft Teams

The mobile app version of Microsoft Teams brings collaboration capabilities to mobile devices including HD audio and video calling/conferencing; group and one-one-chat; file sharing and editing; and access to cloud storage, calendars and to-do lists.

Mitel Teamwork

Available to Mitel Connect Cloud users, the Mitel Teamwork app brings together chat, conferencing, file sharing and task management. Mitel Teamwork enables users to create a workspace, either public or private, for projects with features including messaging, access to files and creation/assignment of tasks.

The mobile version of the work management app includes numerous collaboration features, including real-time access to progress updates from team members and budget approvals. Mobile capabilities include custom notifications and visual analysis of data from multiple views.

Nextiva Cospace

Available as part of the Nextiva Team Collaboration Suite, the Nextiva Cospace mobile app provides chat, video and voice communication, screen sharing and webinar capabilities--as well as file sharing, task management and task sharing.

RingCentral App

The mobile RingCentral App covers messaging, both one-on-one and with teams); file sharing and task management; HD video meetings, meeting recording and screen sharing; and phone calls using your business phone number. The RingCentral App also works with more than 180 out-of-the-box integrations with other apps.


The Slack mobile app offers one-on-one messaging and group chat with your team, including the ability to organize conversations by projects or topics. Other key features include calling, sharing and editing of documents, customized notifications and integration with third-party apps including Salesforce, Google Drive and Dropbox.


The Trello app enables project and task management using Trello’s customizable boards, cards and checklists on a mobile device. Trello on mobile enables users to create cards and drag them across the board to follow the progress of a project. Other capabilities include getting notifications when cards are assigned, updated or completed.

Vonage Business Communications

With the Vonage Business Communications mobile app, users can use their business number for calling on their mobile device, while also getting access to texting and video conferencing over mobile. Features include voicemail, call forwarding and “do not disturb” mode.

Zoom Meetings

Mobile features for the Zoom Meetings app include starting and joining meetings over mobile-- both video and audio--as well as screen sharing and messaging on your mobile device. The Zoom Meetings app can also be used for making calls with your business phone number, getting voicemails and recording/transcribing calls.