With the caveat that no tool will fix communication and culture by itself, this is a great post in pointing people in the right direction.
Really heartened to see several of the suggested tools are libre software also offered as a service.
Also wanted to point out Zulip, which we chose for all the reasons that Twist touts itself, but (in addition to us finding Zulip first) has the added benefit of being libre software, open source, and so self-hostable if needed.