Mattermost - Mattermost is an open source alternative to Slack.
GetYourGuide - Get tickets to the most popular attractions while travelling
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Airbnb Experiences - Airbnb expands beyond rentals — now hosting Experiences
Slack - A messaging app for teams who see through the Earth!
Viator - Tours, things to do, sightseeing tours, day trips and more from Viator.