Zulip
Hacker ApprovedRanked 3 of 11 team chat apps by recommenders
An open-source, self-hostable team chat whose topic-based threads make big, complex conversations easy to follow and catch up on, though self-hosted mobile notifications need a paid subscription.
An open-source, self-hostable team chat whose topic-based threads make big, complex conversations easy to follow and catch up on, though self-hosted mobile notifications need a paid subscription.
201 people gave an opinion
- recommend it
- 143
- criticize it
- 58
- approval share
- 71%
Recommended in 11 of 13 months
- November 2025: recommended
- December 2025: recommended
- January 2026: recommended
- February 2026: recommended
- March 2026: recommended
- April 2026: recommended
- May 2026: recommended
- June 2026: recommended
- July 2026: recommended
- August 2026: recommended
- September 2026: not recommended
- October 2026: recommended
- November 2026: not recommended (month in progress)
Owned for 5 years
Median of the 10 owners who said how long they have had it.
Each square is one year.
Why it carries the badge
- 143 people recommend itNeeds 10 or more, met.
- 2.5 recommenders for every criticNeeds 2 to 1 or better, met.
- Recommended in 11 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Topic threads organize complex conversations
“They really get open source, allow you to own your data, and their UI despite being a bit quirky is IMO the best out there for handling complex conversations”
Comment from 2 Feb 2026 in “Mattermost say they will not clarify what license the project is under” “the topics-based organization and ability for moderators to move/split conversations means one can read and participate in a community much more fully”
Comment from 10 Feb 2026 in “Discord will require a face scan or ID for full access next month” “700K line of high quality code is something to br proud of. It's backward compatible and have very powerful threading system”
Comment from 23 Feb 2026 in “Show HN: Openslack – An open source version of Slack” - Comment from 10 Feb 2026 in “Discord will require a face scan or ID for full access next month”
- Comment from 7 Mar 2026 in “Anthropic, Please Make a New Slack”
- Comment from 15 May 2026 in “The Zulip Foundation”
- Comment from 10 Feb 2026 in “Discord will require a face scan or ID for full access next month”
- Comment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month”
Open source, own your data
“They really get open source, allow you to own your data, and their UI despite being a bit quirky is IMO the best out there for handling complex conversations”
Comment from 2 Feb 2026 in “Mattermost say they will not clarify what license the project is under” “One of the nice things about Zulip's model is that communities that we do not want to host can just migrate to self-hosting.”
Comment from 10 Feb 2026 in “Discord will require a face scan or ID for full access next month” “Zulip self hosted has all features with no restrictions, except for mobile notifications which require a subscription”
Comment from 25 Dec 2025 in “Mattermost restricted access to old messages after 10000 limit is reached” - Comment from 10 Feb 2026 in “Zulip.com Values”
- Comment from 30 Apr 2026 in “Zulip 12.0 Released”
Built for getting work done
“Zulip is a collaboration platform for groups who want to get shit done. I wouldn't recommend it for a "place to hang out".”
Comment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month” “I consider Zulip to be mainly for people who want to achieve things together, not just hang out.”
Comment from 10 Feb 2026 in “Discord will require a face scan or ID for full access next month” “every message belongs to a topic and the async communication focus makes so much sense to me”
Comment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month” Simple to use
“Most of our agents are in their 60s or 70s, so the software must be as simple as possible. That's why we love Zulip”
Comment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month” “none were close in simplicity and features of Zulip. It's one of the best, underrated projects”
Comment from 30 Apr 2026 in “Zulip 12.0 Released”
What people warn about
Each mark is one comment
Mobile notifications require paid subscription
“They did remove mobile notifications without a subscription recently and the price is quite high ONLY for notifications.”
Comment from 10 Feb 2026 in “Discord Alternatives, Ranked” “Zulip self hosted has all features with no restrictions, except for mobile notifications which require a subscription”
Comment from 25 Dec 2025 in “Mattermost restricted access to old messages after 10000 limit is reached” “which has already "broken the seal" of restricting features behind a monthly fee even for self-hosted users”
Comment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month” - Comment from 25 Dec 2025 in “Mattermost restricted access to old messages after 10000 limit is reached”
No end-to-end encryption
“It’s a bit odd that encrypted notifications still don’t work, and I’d argue it’s a very big caveat with regard to privacy and security.”
Comment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month” “It’s a bit odd though that Zulip charge $ for mobile notifications but still don’t have basic end-to-end encryption for those push notifications”
Comment from 25 Dec 2025 in “Mattermost restricted access to old messages after 10000 limit is reached” “avoid Zulip for a properly secure Discord replacement, givin its lack of (and roadmap refusal for) e2e”
Comment from 28 Sep 2026 in “Armada: Encrypted, Open-Source, Discord Alternative (Built on Nostr)” Threading model feels confusing
“The issue is messages show up in multiple places which is unintuitive for someone with a spacial brain like me.”
Comment from 21 Nov 2025 in “Verifying your Matrix devices is becoming mandatory” “Zulip is pretty weird compared to the rest, it's always hard to tell what's even going on with threads within threads within threads.”
Comment from 15 Feb 2026 in “OpenAI Should Build Slack” “Zulip defaults to assuming that all chat is valuable and taxes every interaction with a little bit of up front effort.”
Comment from 10 Feb 2026 in “Zulip.com Values” Janky, unpolished interface
“The mobile app is worse as it only allows writing in a few views that are not easy to access”
Comment from 10 Feb 2026 in “Discord will require a face scan or ID for full access next month” “every time i have to use it for a community i effectively stop interacting with them after a short while just because everything is janky, ugly and feels like a drag to interact with”
Comment from 10 Feb 2026 in “Zulip.com Values” “its just apparent no designer or usability person ever used it or was involved in anything for this project”
Comment from 10 Feb 2026 in “Zulip.com Values” - Comment from 11 Feb 2026 in “Zulip.com Values”
Other team chat apps people recommend
The four most recommended other team chat apps, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Slack | 248 | 387 | 39% | 12 | 10 yrs10 owners | — |
| Microsoft Teams | 228 | 701 | 25% | 13 | 1.5 yrs11 owners | — |
| Zulip | 143 | 58 | 71% | 11 | 5 yrs10 owners | Approved |
| Chatto | 55 | 13 | 81% | 5 | — | Approved |
| Mattermost | 40 | 91 | 31% | 10 | 2 yrs5 owners | — |
What people said
40 of the 284 comments that mention it, newest first. Each links to the original comment.
“avoid Zulip for a properly secure Discord replacement, givin its lack of (and roadmap refusal for) e2e”
“Thanks for your work on Zulip and for everything you did to increase its availability to the masses. Your work was important.”
“I loved the UI because I spent years in pain finding things in big Slack and Mattermost installations”
“the developers who were hired away considered it their responsibility to keep the project and company going independently”
“none were close in simplicity and features of Zulip. It's one of the best, underrated projects”
“I'm increasingly thankful Zulip exists as an open source alternative to other collaborative platforms”
“Zulip's topics map exactly to AI chats - you can have the whole team and the bot focused on one thing.”
“700K line of high quality code is something to br proud of. It's backward compatible and have very powerful threading system”
“Zulip is pretty weird compared to the rest, it's always hard to tell what's even going on with threads within threads within threads.”
“The official docker compose has databases set up already, I guess you were missing those from your ChatGPT created compose file.”
“the bugs i am seeing do not happen in other apps and should be easily fixable in a proper build webapp”
“turns out, there is a design for lighter-weight headers, which I prefer. But they haven't gotten to it yet.”
“It does what we need it to do — while letting us control where it's deployed and where the data is stored”
“Zulip defaults to assuming that all chat is valuable and taxes every interaction with a little bit of up front effort.”
“its just apparent no designer or usability person ever used it or was involved in anything for this project”
“I have found Zulip makes it easier to come back and catch up on just the bits you care about.”
“They did remove mobile notifications without a subscription recently and the price is quite high ONLY for notifications.”
“The mobile app is worse as it only allows writing in a few views that are not easy to access”
“every time i have to use it for a community i effectively stop interacting with them after a short while just because everything is janky, ugly and feels like a drag to interact with”
“Zulip isn't charging you anything unless you're a business with more than 10 users and need push notifications”
“One of the nice things about Zulip's model is that communities that we do not want to host can just migrate to self-hosting.”
“Zulip's implementation of notifications may be both a) better for usability and b) a lower maintenance burden”
“the topics-based organization and ability for moderators to move/split conversations means one can read and participate in a community much more fully”
“I love Zulip's UX. The fact that everything is a thread in a channel means I can quickly skip the threads I don't want”
“I consider Zulip to be mainly for people who want to achieve things together, not just hang out.”
“Zulip has a "channel view" which lets you see all messages in a channel, chronologically, just like Slack or Discord or IRC.”
“You can do everything with the keyboard, and we do write everything with screenreader accessibility and colorblindness accessibility in mind.”
“It’s a bit odd that encrypted notifications still don’t work, and I’d argue it’s a very big caveat with regard to privacy and security.”
“which has already "broken the seal" of restricting features behind a monthly fee even for self-hosted users”
“Zulip is a collaboration platform for groups who want to get shit done. I wouldn't recommend it for a "place to hang out".”
“I used it at my previous employer and after a month of hangringing from people- many did not desire to go back to what we had before.”
“Most of our agents are in their 60s or 70s, so the software must be as simple as possible. That's why we love Zulip”
“every message belongs to a topic and the async communication focus makes so much sense to me”
“They really get open source, allow you to own your data, and their UI despite being a bit quirky is IMO the best out there for handling complex conversations”
“Slack competitors like Teams, Zulip, and Mattermost all offer easy ability to integrate with anything that can make a web request.”
“you can mark any Zulip channel as public, which means the chat history for that channel does not require a login to view”
“It’s a bit odd though that Zulip charge $ for mobile notifications but still don’t have basic end-to-end encryption for those push notifications”
“Zulip self hosted has all features with no restrictions, except for mobile notifications which require a subscription”
“The issue is messages show up in multiple places which is unintuitive for someone with a spacial brain like me.”
“Zulip is 100% open-source, and we sponsor our hosted services (mobile notifications, etc.) free for OSS projects.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.