Chatto
Hacker ApprovedRanked 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%
Recommended in 5 of 13 months
- November 2025: not recommended
- December 2025: not recommended
- January 2026: not recommended
- February 2026: recommended
- March 2026: not recommended
- April 2026: not recommended
- May 2026: not recommended
- June 2026: not recommended
- July 2026: recommended
- August 2026: recommended
- September 2026: recommended
- October 2026: recommended
- 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” - 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.
| 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 |
| ChattoThis page | 55 | 13 | 81% | 5 | — | Approved |
| Mattermost | 40 | 91 | 31% | 10 | 2 yrs5 owners | — |
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”
“it works pretty well so far, although the API is (by the author's own admission) not fully stable yet”
“Its actually well engineered (not vbibecoded), the devs are responsive”
“But looking at the code, I wouldn’t trust any of my personal information to it.”
“Still early in development, but self-hosted version is available and the dev has been responsive and nice to chat to.”
“I've played with Chatto a bit and it seems surprisingly solid overall thus far.”
“Looks like a cool project, thanks for the reference.”
“Seems to be an open-source Slack and Discord alternative with a nice UI.”
“The documentation looks very pleasing. But it doesn't seem to be free, too.”
“one of the easiest to spin up an instance of that I've seen thus far”
“first self-hostable, open source one I've seen that doesn't look like design is the very last item”
“It's a really cool project and clearly you put a lot of effort behind it.”
“easier to host and less complicated than Mattermost”
“Chatto is quite lightweight though; a fresh instance will run at tens of MB of RAM usage.”
“You can self-host Chatto with zero limitations without having to pay me.”
“commits to providing a strong PWA experience that also works great on mobile”
“it sounds like the direction you're going in with Chatto is precisely what I was envisioning”
“While I do need E2E and SSO making Chatto not suitable, it looks pretty cool.”
“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.”
“the protobuf based realtime endpoint should make it very easy to build bridges”
“one of the main things I like about Chatto is just how fast everything feels”
“I use the desktop version as my daily Chatto driver”
“Chatto just flies and Slack feels incredibly sluggish.”
“Having this as the frontend to a load of integrations (or even just internal chat) would be really interesting.”
“it already looks like it has most of the features”
“without significantly better marketing material it'll have a chance at becoming relevant”
“since you can self host it, you still get a lot more control over the data”
“Needs drop in voice rooms a la Discord or Slack's Huddle”
“We just want a performant chat with simple features.”
“I can guarantee it's a buggy, incoherent mess, same as every other vibe coded app I've ever tried”
“This is super cool. More options is always good.”
“appears to be simpler to setup and also has simpler licensing”
“I see nothing obvious here that solves the noise and irritation of Discord and Slack.”
“There's space for more than one self-hosted chat app in the world.”
“I like the idea of having one frontend for multiple servers instead of pushing hard on p2p or federation.”
“It’s designed to be extremely easy to self-host on your own infrastructure.”
“I'm confident this project will become successful very quickly.”
“this seems like perfect thing to have for your family and friends”
“feels much nicer to use than Slack, but as of now it's missing some of the more 'Enterprise' features”
“Looks really nice, thank you for open-sourcing.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.