Slack and teams alternative

Hi all... I'm building an alternative for slack and teams ...... Where businesses don't have to pay monthly user fees but can get the software just by doing one payment and host it on their own machine .... Below are the demo of early version let me know what you think

https://drive.google.com/file/d/1N1gqui2FV7IDe0hlTg1J3LvPBkD-tSAs/view?usp=sharing