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Zulip

Hacker Approved

Ranked 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%
Each figure is 2 people. RecommendsCriticizes

Recommended in 11 of 13 months

  1. November 2025: recommended
  2. December 2025: recommended
  3. January 2026: recommended
  4. February 2026: recommended
  5. March 2026: recommended
  6. April 2026: recommended
  7. May 2026: recommended
  8. June 2026: recommended
  9. July 2026: recommended
  10. August 2026: recommended
  11. September 2026: not recommended
  12. October 2026: recommended
  13. 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”
  • 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”
  • 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”
  • 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”

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.

Zulip compared with 4 alternatives
ProductRecommendCriticizeApprovalMonthsOwnedBadge
Slack24838739%1210 yrs10 owners—
Microsoft Teams22870125%131.5 yrs11 owners—
ZulipThis page1435871%115 yrs10 ownersApproved
Chatto551381%5—Approved
Mattermost409131%102 yrs5 owners—
See all 11 team chat apps, ranked

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”

CriticizesComment from 28 Sep 2026 in “Armada: Encrypted, Open-Source, Discord Alternative (Built on Nostr)”

“Thanks for your work on Zulip and for everything you did to increase its availability to the masses. Your work was important.”

RecommendsComment from 16 May 2026 in “The Zulip Foundation”

“I loved the UI because I spent years in pain finding things in big Slack and Mattermost installations”

RecommendsComment from 15 May 2026 in “The Zulip Foundation”

“the developers who were hired away considered it their responsibility to keep the project and company going independently”

RecommendsComment from 15 May 2026 in “The Zulip Foundation”

“none were close in simplicity and features of Zulip. It's one of the best, underrated projects”

RecommendsComment from 30 Apr 2026 in “Zulip 12.0 Released”

“I'm increasingly thankful Zulip exists as an open source alternative to other collaborative platforms”

RecommendsComment from 30 Apr 2026 in “Zulip 12.0 Released”

“Zulip's topics map exactly to AI chats - you can have the whole team and the bot focused on one thing.”

RecommendsComment from 7 Mar 2026 in “Anthropic, Please Make a New Slack”

“700K line of high quality code is something to br proud of. It's backward compatible and have very powerful threading system”

RecommendsComment from 23 Feb 2026 in “Show HN: Openslack – An open source version of Slack”

“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.”

CriticizesComment from 15 Feb 2026 in “OpenAI Should Build Slack”

“The official docker compose has databases set up already, I guess you were missing those from your ChatGPT created compose file.”

RecommendsComment from 11 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“the bugs i am seeing do not happen in other apps and should be easily fixable in a proper build webapp”

CriticizesComment from 11 Feb 2026 in “Zulip.com Values”

“turns out, there is a design for lighter-weight headers, which I prefer. But they haven't gotten to it yet.”

MixedComment from 11 Feb 2026 in “Discord Alternatives, Ranked”

“It does what we need it to do — while letting us control where it's deployed and where the data is stored”

MixedComment from 10 Feb 2026 in “Zulip.com Values”

“Zulip defaults to assuming that all chat is valuable and taxes every interaction with a little bit of up front effort.”

MixedComment 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”

CriticizesComment from 10 Feb 2026 in “Zulip.com Values”

“I have found Zulip makes it easier to come back and catch up on just the bits you care about.”

RecommendsComment from 10 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“They did remove mobile notifications without a subscription recently and the price is quite high ONLY for notifications.”

MixedComment from 10 Feb 2026 in “Discord Alternatives, Ranked”

“The mobile app is worse as it only allows writing in a few views that are not easy to access”

MixedComment 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”

CriticizesComment from 10 Feb 2026 in “Zulip.com Values”

“Zulip isn't charging you anything unless you're a business with more than 10 users and need push notifications”

RecommendsComment from 10 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“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.”

RecommendsComment from 10 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“Zulip's implementation of notifications may be both a) better for usability and b) a lower maintenance burden”

RecommendsComment from 10 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“the topics-based organization and ability for moderators to move/split conversations means one can read and participate in a community much more fully”

RecommendsComment from 10 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“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”

RecommendsComment from 10 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.”

RecommendsComment from 10 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“Zulip has a "channel view" which lets you see all messages in a channel, chronologically, just like Slack or Discord or IRC.”

RecommendsComment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“You can do everything with the keyboard, and we do write everything with screenreader accessibility and colorblindness accessibility in mind.”

RecommendsComment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“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.”

MixedComment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“which has already "broken the seal" of restricting features behind a monthly fee even for self-hosted users”

MixedComment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“Zulip is a collaboration platform for groups who want to get shit done. I wouldn't recommend it for a "place to hang out".”

MixedComment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“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.”

RecommendsComment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“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”

RecommendsComment from 9 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”

RecommendsComment from 9 Feb 2026 in “Discord will require a face scan or ID for full access next month”

“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”

RecommendsComment from 2 Feb 2026 in “Mattermost say they will not clarify what license the project is under”

“Slack competitors like Teams, Zulip, and Mattermost all offer easy ability to integrate with anything that can make a web request.”

MixedComment from 19 Jan 2026 in “Show HN: Dock – Slack minus the bloat, tax, and 90-day memory loss”

“you can mark any Zulip channel as public, which means the chat history for that channel does not require a login to view”

RecommendsComment from 26 Dec 2025 in “Mattermost restricted access to old messages after 10000 limit is reached”

“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”

CriticizesComment from 25 Dec 2025 in “Mattermost restricted access to old messages after 10000 limit is reached”

“Zulip self hosted has all features with no restrictions, except for mobile notifications which require a subscription”

MixedComment from 25 Dec 2025 in “Mattermost restricted access to old messages after 10000 limit is reached”

“The issue is messages show up in multiple places which is unintuitive for someone with a spacial brain like me.”

MixedComment from 21 Nov 2025 in “Verifying your Matrix devices is becoming mandatory”

“Zulip is 100% open-source, and we sponsor our hosted services (mobile notifications, etc.) free for OSS projects.”

RecommendsComment from 20 Nov 2025 in “Verifying your Matrix devices is becoming mandatory”

Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.