> your company already allows a third-party to access your email and chat history

I'd suggest, when trying to win over a technical community, you don't speak to us like we're completely ignorant. Those "third-parties" are the service providers themselves.

I'm going to trust Google and Slack a tiny bit more than LoopHQ's two employees (https://www.linkedin.com/company/loopscore/). And as neither of you have any technical experience whatsoever, this tells me you hired an outside team to build your products, which makes me question the on-going product quality, support, and security even more.