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I'm just wondering why these services need centralised hosting to begin with. Peer-to-peer networking isn't new, Blockchain as a tech could take care of decentralised but shared information.

And I don't mean that a company of 10 people depends on each other, their messages are also hashed, seeded, encrypted, etc. on the entire network. Each company and each individual can have their own unique key that's used to make their own messages and content readable again.

Of course, a company should be able to choose to only share messages across their own employees and not to anyone outside, if they are wary of security issues. Messages could have set expirations, too, etc.

We shouldn't need an expensive middle-man. It should be a free open-source project.

But I'm not a networking expert. Is this simply not feasible for other reasons? I'd love to work on such a project as a software engineer, for sure.