[tabbott]

I lead the Zulip project, and we would definitely have been excited to do the work to make Zulip available. Unfortunately, they didn't contact us.

After seeing this blog post, I emailed the OP yesterday offering to add whatever they need to evaluate Zulip (which sounds like is just SAML authentication work that's was already on our near-term roadmap). He replied that they're too late in their evaluation process to consider Zulip :(. I really wish they'd thought to get in touch with us about this concern.