Short version

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[Status]: Europe, pre-incorporation, two working on a project for more than a year, reached private beta in May but have no users. Started to look for investors. I am the tech guy, my cofounder is the sales guy (talks a lot, befriends almost anyone, never says no) with some tech knowledge (he thinks he's a coding rockstar but he's not).

[Problems]: he refuses to communicate, doesn't include me in talks with potential investors he gets via his contacts, I have almost no money anymore (he has significantly more and is much more worry-free). I mentioned splitting our codebase and parting our ways - he threatened to talk to lawyers about it (at first, he tried to be friendly then).

[Questions]: What should I do? Is it dead already? Would it be too unethical to e-mail the potential investors myself without a proper introduction? What about splitting the code? Could he use the lawyers somehow? (we have no written agreements whatsoever)

Details

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He pitched our project to investors, befriended them, got hired by them to help them with projects they invested into. I asked to be included in talks with potential investors but was ignored for the most part. He offered to let me help to some of the "VC's" portfolio companies as a side-job. He says that they will invest in us sometime in late September. He wants to raise $1m or more. I think that's insane.

We have a prototype because I pushed for it. I have to fight with him so that he doesn't implement yet another feature or doesn't reimplement something for which we could easily get an existing library.

I told him many times I am not satisfied with our execution and our mutual communication.

I guess it's better to end it now? I am afraid that after incorporation and possible funding there would be only more problems.

Codebase: we worked on quite clearly separated modules, I designed the overall architecture.

Thanks for reading and comments.