- Is OpenFire under active development?
Have a look at the SVN and decide for yourself: http://fisheye.igniterealtime.org/changelog/openfire
Have a look at the git and decide for yourself: https://github.com/igniterealtime/Openfire/graphs/contributors
- Is Openfire stable in production.
I believe that Openfire is used in many production environments. But I can’t comment on how stable it is for others. I use Openfire as my personal XMPP server instance and it works for me. Although I am likley going to switch sooner or later prosody, because it’s supports more XEPs (e.g. Stream Mangement) and has a more active developer community.
That doesn’t mean that openfire is bad for production use. It’s just that prosody seems to fit my use-case better then openfire. There sure are cases where openfire is better suited as prosody. It depends on what you want. Note that there are also a few other (open-source) XMPP server software out there.
- How many users can it support. I heard 4500 someplace and someone else said 200,000. which is correct. I would prefer 200,000.
There sure is no hardcoded maximum user limit in openfire. It will depend on your hardware and database.