I've created a task about this on Google Code-in https://codein.withgoogle.com/dashboard/tasks/4869162868408320/ and I plan to mentor this.

Should this task include or exclude research on MatterMost and Zulip, which is covered by T154001, or should it be up to the participant to choose whether to include/exclude those two?

@jayvdb I think it should be up to the participant.

Kandan seems to be abandonded, so I won't do a research onto that.

@divadsn sounds good! comment here or on the GCI task whenever you are done adding the new sections.

Done, I've summarized everything and made my own conclusion :)

@srishakatux I am doing another research on Kontalk, as Telegram isn't really open-source.

And thanks to @jayvdb for his suggestions to improve my work!

Thank you @divadsn -- I've left a question at https://meta.wikimedia.org/wiki/Talk:Research_on_open_source_team_communication_tools#On_Zulip.27s_bugs .

I have replaced Telegram now with Kontalk, I will change my conclusion after I have tested Zulip again.

@sumanah thanks for your question, I have replied to that at the talk page. It would be good to know from you when the next release is planned to be available or if the latest dev release is stable enough for production use.