Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Slack - A messaging app for teams who see through the Earth!
Gitter - Where developers come to talk.
Flock - A faster way for your team to communicate
Mattermost - Mattermost is an open source alternative to Slack.
Verafin - Verafin provides compliance, anti-money laundering, and fraud detection software.