The ideal platform will depend on the specific needs and preferences of the group. Some popular options include Spike, WhatsApp, Slack, Microsoft Teams, Google Chat, and Discord, among others. Each platform offers different features, such as file sharing, video conferencing, and integrations with other apps, so it is important to consider which features are most important for your group. Ultimately, the best group chat app or tool is one that is user-friendly, reliable, and meets the communication needs of the group.