HipChat vs Microsoft Teams

Group chat and video chat built for teams. Share ideas, code, and files with your team in real time. Rooms are perfect for individual projects, teams, or entire departments. You can also hop into a 1-to-1 chat with a coworker anytime. Connect your team and build genuine consensus with face-to-face video chat and real-time screen sharing. The next best thing to right next to you. HipChat free open-source (self-hosted) alternatives are: Mattermost, Rocket.Chat, Zulip
Microsoft Teams
Microsoft Teams is the chat-based workspace in Office 365 that integrates all the people, content, and tools your team needs to be more engaged and effective. Microsoft Teams free open-source (self-hosted) alternatives are: Mattermost, Rocket.Chat, Zulip
Microsoft Teams has better video than HipChat

2017 - Microsoft opened Teams to all Office 365 users. HipChat should better react

Microsoft's Slack rival - Teams - is now available, and free, for all 85 million monthly active users of Office 365, Microsoft’s suite of cloud services and apps as a web app and native apps for Windows, iOS and Android.  Along with it, the company is announcing some 150 integrations with third-party services like Asana, Zendesk and Hootsuite, alongside the ability to chat (with other humans or with bots), security services, customization options and more. For a new app that is coming to the market after the meteoric rise of Slack, as well as other competing services like Workplace from Facebook and Hipchat from Atlassian, some might argue that Teams and Microsoft are late to the game. In its favor, Microsoft is banking on the low-friction aspect of the service: Those being targeted are already using Microsoft apps like Excel, Word, PowerPoint, OneNote, SharePoint and Power BI, so there will be familiarity and convenience. And it’s free to try out.