Hacker ApprovedDepartments

Chatto

Hacker Approved

Ranked 4 of 11 team chat apps by recommenders

Open-source, self-hostable chat app that feels fast and is easy to set up; caveats are an unstable API and missing enterprise features like SSO.

Open-source, self-hostable chat app that feels fast and is easy to set up; caveats are an unstable API and missing enterprise features like SSO.

68 people gave an opinion

recommend it
55
criticize it
13
approval share
81%
Each figure is one person. RecommendsCriticizes

Recommended in 5 of 13 months

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

Why it carries the badge

  • 55 people recommend itNeeds 10 or more, met.
  • 4.2 recommenders for every criticNeeds 2 to 1 or better, met.
  • Recommended in 5 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

  • Easy to self-host

    “It’s designed to be extremely easy to self-host on your own infrastructure.”

    Comment from 8 Jul 2026 in “Chatto is now Open Source”

    “one of the easiest to spin up an instance of that I've seen thus far”

    Comment from 9 Jul 2026 in “Why developers are ditching GitHub for Codeberg and self-hosting alternatives”

    “easier to host and less complicated than Mattermost”

    Comment from 9 Jul 2026 in “Chatto is now Open Source”
  • Fast, responsive interface

    “one of the main things I like about Chatto is just how fast everything feels”

    Comment from 8 Jul 2026 in “Chatto is now Open Source”

    “Chatto just flies and Slack feels incredibly sluggish.”

    Comment from 8 Jul 2026 in “Chatto is now Open Source”

    “I've played with Chatto a bit and it seems surprisingly solid overall thus far.”

    Comment from 28 Jul 2026 in “A Discord Alternative – Echoed”
  • Clean, nice-looking UI

    “Seems to be an open-source Slack and Discord alternative with a nice UI.”

    Comment from 27 Jul 2026 in “A Discord Alternative – Echoed”

    “first self-hostable, open source one I've seen that doesn't look like design is the very last item”

    Comment from 9 Jul 2026 in “Chatto is now Open Source”
  • Works well on mobile

    “it does also have first-class PWA support, so you can easily install the webapp as a mobile app on mobile devices. Works great on Android.”

    Comment from 9 Jul 2026 in “Chatto is now Open Source”

    “commits to providing a strong PWA experience that also works great on mobile”

    Comment from 9 Jul 2026 in “Chatto is now Open Source”

What people warn about

Each mark is one comment

  • Missing enterprise features like SSO

    “feels much nicer to use than Slack, but as of now it's missing some of the more 'Enterprise' features”

    Comment from 8 Jul 2026 in “Chatto is now Open Source”

    “While I do need E2E and SSO making Chatto not suitable, it looks pretty cool.”

    Comment from 9 Jul 2026 in “Chatto is now Open Source”
  • Code quality and trust concerns

    “But looking at the code, I wouldn’t trust any of my personal information to it.”

    Comment from 19 Aug 2026 in “OpenLogi”

    “I can guarantee it's a buggy, incoherent mess, same as every other vibe coded app I've ever tried”

    Comment from 8 Jul 2026 in “Chatto is now Open Source”

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.

Chatto compared with 4 alternatives
ProductRecommendCriticizeApprovalMonthsOwnedBadge
Slack24838739%1210 yrs10 owners—
Microsoft Teams22870125%131.5 yrs11 owners—
Zulip1435871%115 yrs10 ownersApproved
ChattoThis page551381%5—Approved
Mattermost409131%102 yrs5 owners—
See all 11 team chat apps, ranked

What people said

40 of the 86 comments that mention it, newest first. Each links to the original comment.

“it does not allow you to connect to your own server right away”

MixedComment from 14 Oct 2026 in “Strafe: A new open-source, E2E Encrypted, and federated alternative to Discord”

“it works pretty well so far, although the API is (by the author's own admission) not fully stable yet”

MixedComment from 14 Oct 2026 in “Strafe: A new open-source, E2E Encrypted, and federated alternative to Discord”

“Its actually well engineered (not vbibecoded), the devs are responsive”

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

“But looking at the code, I wouldn’t trust any of my personal information to it.”

MixedComment from 19 Aug 2026 in “OpenLogi”

“Still early in development, but self-hosted version is available and the dev has been responsive and nice to chat to.”

RecommendsComment from 1 Aug 2026 in “A Week in Matrix”

“I've played with Chatto a bit and it seems surprisingly solid overall thus far.”

RecommendsComment from 28 Jul 2026 in “A Discord Alternative – Echoed”

“Looks like a cool project, thanks for the reference.”

RecommendsComment from 27 Jul 2026 in “A Discord Alternative – Echoed”

“Seems to be an open-source Slack and Discord alternative with a nice UI.”

RecommendsComment from 27 Jul 2026 in “A Discord Alternative – Echoed”

“The documentation looks very pleasing. But it doesn't seem to be free, too.”

MixedComment from 9 Jul 2026 in “Chatto is now Open Source”

“one of the easiest to spin up an instance of that I've seen thus far”

RecommendsComment from 9 Jul 2026 in “Why developers are ditching GitHub for Codeberg and self-hosting alternatives”

“first self-hostable, open source one I've seen that doesn't look like design is the very last item”

RecommendsComment from 9 Jul 2026 in “Chatto is now Open Source”

“It's a really cool project and clearly you put a lot of effort behind it.”

RecommendsComment from 9 Jul 2026 in “Chatto is now Open Source”

“easier to host and less complicated than Mattermost”

MixedComment from 9 Jul 2026 in “Chatto is now Open Source”

“Chatto is quite lightweight though; a fresh instance will run at tens of MB of RAM usage.”

RecommendsComment from 9 Jul 2026 in “Chatto is now Open Source”

“You can self-host Chatto with zero limitations without having to pay me.”

RecommendsComment from 9 Jul 2026 in “Chatto is now Open Source”

“commits to providing a strong PWA experience that also works great on mobile”

RecommendsComment from 9 Jul 2026 in “Chatto is now Open Source”

“it sounds like the direction you're going in with Chatto is precisely what I was envisioning”

RecommendsComment from 9 Jul 2026 in “Chatto is now Open Source”

“While I do need E2E and SSO making Chatto not suitable, it looks pretty cool.”

MixedComment from 9 Jul 2026 in “Chatto is now Open Source”

“it does also have first-class PWA support, so you can easily install the webapp as a mobile app on mobile devices. Works great on Android.”

RecommendsComment from 9 Jul 2026 in “Chatto is now Open Source”

“the protobuf based realtime endpoint should make it very easy to build bridges”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“one of the main things I like about Chatto is just how fast everything feels”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“I use the desktop version as my daily Chatto driver”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“Chatto just flies and Slack feels incredibly sluggish.”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“Having this as the frontend to a load of integrations (or even just internal chat) would be really interesting.”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“it already looks like it has most of the features”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“without significantly better marketing material it'll have a chance at becoming relevant”

MixedComment from 8 Jul 2026 in “Chatto is now Open Source”

“since you can self host it, you still get a lot more control over the data”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“Needs drop in voice rooms a la Discord or Slack's Huddle”

MixedComment from 8 Jul 2026 in “Chatto is now Open Source”

“We just want a performant chat with simple features.”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“I can guarantee it's a buggy, incoherent mess, same as every other vibe coded app I've ever tried”

CriticizesComment from 8 Jul 2026 in “Chatto is now Open Source”

“This is super cool. More options is always good.”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“appears to be simpler to setup and also has simpler licensing”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“I see nothing obvious here that solves the noise and irritation of Discord and Slack.”

MixedComment from 8 Jul 2026 in “Chatto is now Open Source”

“There's space for more than one self-hosted chat app in the world.”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“I like the idea of having one frontend for multiple servers instead of pushing hard on p2p or federation.”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“It’s designed to be extremely easy to self-host on your own infrastructure.”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“I'm confident this project will become successful very quickly.”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

“this seems like perfect thing to have for your family and friends”

MixedComment from 8 Jul 2026 in “Chatto is now Open Source”

“feels much nicer to use than Slack, but as of now it's missing some of the more 'Enterprise' features”

MixedComment from 8 Jul 2026 in “Chatto is now Open Source”

“Looks really nice, thank you for open-sourcing.”

RecommendsComment from 8 Jul 2026 in “Chatto is now Open Source”

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