Chatto is now open source

#1

Post by speckx » Wed, Jul 08, 2026, 3:19 PM UTC

Re: Chatto is now open source

#2

Post by theturtletalks » Wed, Jul 08, 2026, 3:31 PM UTC

Looks really nice, thank you for open-sourcing. I keep a directory of opensource alternatives. Would you say this is a Discord or Slack alternative?

Re: Chatto is now open source

#3

Post by DANmode » Wed, Jul 08, 2026, 3:36 PM UTC

theturtletalks wrote: post #2

Looks really nice, thank you for open-sourcing. I keep a directory of opensource alternatives. Would you say this is a Discord or Slack alternative?

> You’re probably familiar with the one that rhymes with “knack”, or the one that rhymes with “beams”, or the one that rhymes with “this gourd”.

> Chatto is just like those.

from TFA. Seems yes.

Re: Chatto is now open source

#4

Post by [deleted] » Wed, Jul 08, 2026, 3:36 PM UTC

theturtletalks wrote: post #2

Looks really nice, thank you for open-sourcing. I keep a directory of opensource alternatives. Would you say this is a Discord or Slack alternative?

[deleted]

Re: Chatto is now open source

#5

Post by moeffju » Wed, Jul 08, 2026, 3:40 PM UTC

theturtletalks wrote: post #2

Looks really nice, thank you for open-sourcing. I keep a directory of opensource alternatives. Would you say this is a Discord or Slack alternative?

I've been testing/using chatto since early on and I'd say it's both and neither. It feels much nicer to use than Slack, but as of now it's missing some of the more "Enterprise" features. I would probably say it's a Slack-like Discord? But from the architecture it would be capable of playing as a full Slack replacement.

I also maintain a Chatto bot framework and a Tauri client, need to update those now :)

Re: Chatto is now open source

#6

Post by vsviridov » Wed, Jul 08, 2026, 3:44 PM UTC

Amazing. And with SSO out of the box without weird "Oh, SSO is Enterprise only" BS.

Re: Chatto is now open source

#7

Post by toomuchtodo » Wed, Jul 08, 2026, 3:50 PM UTC

Very cool! You should request being added to https://european-alternatives.eu/

Re: Chatto is now open source

#8

Post by npodbielski » Wed, Jul 08, 2026, 3:57 PM UTC

Ah mobile app is not ready yet. I am looking for some alternative to matrix because running it with bots is a bit convoluted, i.e. you have to have limit of edits of message for model streaming or you will kill entire room. Or I never seen robots in matrix sending encrypted messages. Why bother than? Anyway if mobile will be a thing this seems like perfect thing to have for your family and friends.

Re: Chatto is now open source

#9

Post by mertbio » Wed, Jul 08, 2026, 3:59 PM UTC

I’ve known Hendrik for years, and he is one of the most talented developers I’ve ever met. I’m confident this project will become successful very quickly. Beyond the project itself, what fascinates me most is how he single-handedly developed it by leveraging agentic coding.

Re: Chatto is now open source

#10

Post by wxw » Wed, Jul 08, 2026, 4:06 PM UTC

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

Kudos for this. Per the docs: https://docs.chatto.run/,

> Chatto ships in a compact, self-contained binary

> it uses NATS, a compact message broker that also ships with a built-in stream persistence engine [...] NATS is just as easy to provision as Chatto, and most of our examples will show you how.

> you can also configure an external S3-compatible object storage for Chatto to store your files in, and we strongly recommend doing so...

> The actual calls are powered by LiveKit (Apache-2.0), which you need to deploy alongside Chatto. As with NATS, the deployment examples show the required wiring.

> ...

And kudos for backing it up with real guidance. Great project.