What I would do if hosting Zulip for a company, is:
(1) host an up to date Zulip version
(2) setup or rent a Jitsi Meet or other open source / free software voice + video chat solution. Jitsi Meet might be a bit difficult to properly set up, compared to Zulip, because of extra things needed, like TURN server and in general the complexities of web RTC. Maybe renting that for some < 10 EUR is fine for a company.
(3) Configure Zulip to have for example `/jitsi` or `/meeting` for creating meetings right out of Zulip.
(4) Setup other integrations, that exist for Zulip.
(5) Setup backups for the Zulip database. It is just a postgres database. One can dump it and move the dump to a backup store.
If this is too much, for example because the company doesn't have the knowledge in their employees to manage this, then one can also rent Zulip hosted solutions.
Getting away from Salesforce alone is in my opinion already worth it.
(1) host an up to date Zulip version
(2) setup or rent a Jitsi Meet or other open source / free software voice + video chat solution. Jitsi Meet might be a bit difficult to properly set up, compared to Zulip, because of extra things needed, like TURN server and in general the complexities of web RTC. Maybe renting that for some < 10 EUR is fine for a company.
(3) Configure Zulip to have for example `/jitsi` or `/meeting` for creating meetings right out of Zulip.
(4) Setup other integrations, that exist for Zulip.
(5) Setup backups for the Zulip database. It is just a postgres database. One can dump it and move the dump to a backup store.
If this is too much, for example because the company doesn't have the knowledge in their employees to manage this, then one can also rent Zulip hosted solutions.
Getting away from Salesforce alone is in my opinion already worth it.