It seems to be a bigger interest in 'degoogling' lately. I'd like to ask the smart folks around here how would you tackle building a successful G Suite alternative as a sustainable business. What strategies / partnerships / business model would you pursue?

For example, being such a big effort, I think open source is required in order to attract contributors, both hobbyists and companies (and maybe governments). It would also be the main differentiator.

FYI I made a proposal for Mozilla (https://www.linkedin.com/pulse/open-letter-mozilla-please-offer-g-suite-alternative-marius-andreiana/) which seemed a great fit, but they weren't interested.