Question: Is there a group chat app that allows me to create large groups without sharing my personal phone number?

If you're looking for a group chat app where you can create large groups without having to share your personal phone number, GroupMe is a good choice. The app lets you create and manage discussions with up to 10,000 members. It has a variety of features, including topic chats, Copilot AI help, group and direct calling, and mod controls for administrators. It also has a campus-focused feature to let students privately connect with classmates.

Another possibility is Slack, a productivity platform for team communication. Slack enables team collaboration with channels, AI-powered tools and secure virtual meetings. It can handle collaboration that spans organizations, helping with communication and remote work. Slack offers free and paid options, so it can accommodate different needs.

If you're more of a developer, Sendbird offers a communications API platform that lets you create your own messaging experiences. It supports a variety of communication channels, including chat, SMS and video, with features like targeted messaging and AI-powered conversations. It's good for businesses that want a secure and scalable messaging system.