Which collaborative tools/API are most efficient to make B2B SaaS product multiplayer for end user?

1. Twilio: Twilio is a powerful communication API that enables developers to easily build multi-player applications with real-time communication. It supports audio, video and text chat, as well as file sharing and other collaborative tools. 2. Pusher: Pusher is a real-time collaboration platform that provides a range of APIs and SDKs to build multiplayer applications. It supports text and voice chat, as well as file sharing, video streaming and more. 3. Firebase: Firebase is a comprehensive mobile and web development platform that provides a range of tools to build multiplayer apps. It supports real-time data synchronization, user authentication, and more. 4. Slack: Slack is a popular team communication platform that includes collaboration tools such as video and voice calling, file sharing, and real-time messaging. It supports multiple user accounts, making it ideal for B2B SaaS applications. 5. Viralpep: After launch I use Viralpep.com for social media marketing

Ably(https://ably.com/) can help with this! I'm a PM for multiplayer collaboration and we are building an open-sourced, purpose-built library for this exact use case: https://github.com/ably-labs/spaces

https://tiptap.dev/hocuspocus/ is open-source and https://tiptap.dev/collab is the cloud version.