[alnitak]

I have been looking for an alternative to the Google apps ecosystem, to support mailing, calendar, contacts and document editing, but most importantly it should allow me to have "guests" contributors to documents I can share with them.

Anybody knows of a company providing such a service?

[swsieber]

Sandstorm.io? I don't think it would cover everything... but it might work.

[ocdtrekkie]

I use FastMail for all my mail, calendar, and contacts, and Sandstorm.io for collaborative document work.

[the_common_man]

Try nextcloud, rainloop, ether* on cloudron