With today's ever growing awareness and concerns surrounding data integrity and privacy, the only way to really promote your best intentions towards your customers/users is to self-host everything that processes their data.

I'm not even a super techy geek, just a regular entrepeneur with some common sense, yet I already self-host our VOIP/SIP server, (encrypted) email, contacts and calendar, live chat and internal instant messaging (RocketChat), password management (BitWarden) and heatmaps/polls/analytics (Matomo). A self-hosted option for a platform like Missive (perhaps in Docker?) would make perfect sense in this privacy-conscious era and would be huge USP for you guys as well (if you release it sooner than your competitors).