Signal isn't federated ^[1][2][3.1]^; it's decentralized ^[1][2][3.2]^. Though, for all practical purposes, I would generally argue that it's centralized.

::: spoiler References
1. Signal-Server. signalapp. Github. Published: 2025-01-31T15:34:14.000Z. Accessed: 2025-02-01T09:24Z. github.com/signalapp/Signal-Se….
- This is the source code for the server that Signal uses.
2. "Signal (software)". Wikipedia. Published: 2025-01-06T09:34Z. Accessed: 2025-02-1T09:30Z. en.wikipedia.org/wiki/Signal_(….
- ¶"Architecture". ¶"Servers".

Signal relies on centralized servers that are maintained by Signal Messenger. In addition to routing Signal's messages, the servers also facilitate the discovery of contacts who are also registered Signal users and the automatic exchange of users' public keys. […]
3. "Reflections: The ecosystem is moving". moxie0. Signal Blog. Published: 2016-05-10. Accessed: 2025-02-01T09:40Z. signal.org/blog/the-ecosystem-….
1. ¶5. to ¶"Stuck in time". ¶3-6
One of the controversial things we did with Signal early on was to build it as an unfederated service. Nothing about any of the protocols we’ve developed requires centralization; it’s entirely possible to build a federated Signal Protocol-based messenger, but I no longer believe that it is possible to build a competitive federated messenger at all. […] [interoperable protocols] [have] taken us pretty far, but it’s undeniable that once you federate your protocol, it becomes very difficult to make changes. And right now, at the application level, things that stand still don’t fare very well in a world where the ecosystem is moving. […] Early on, I thought we’d federate Signal once its velocity had subsided. Now I realize that things will probably never slow down, and if anything the velocity of the entire landscape seems to be steadily increasing.
2. ¶"Stuck in time". "Federation and control". ¶6.
An open source infrastructure for a centralized network now provides almost the same level of control as federated protocols, without giving up the ability to adapt. If a centralized provider with an open source infrastructure ever makes horrible changes, those that disagree have the software they need to run their own alternative instead. It may not be as beautiful as federation, but at this point it seems that it will have to do.
:::

Reflections: The ecosystem is moving

At Open Whisper Systems, we’ve been developing open source “consumer-facing” software for the past four years. We want to share some of the things we’ve learned while doing it. As a software developer, I envy writers, musicians, and filmmakers.

^{Signal Messenger}

For the avid readers out there, bookwyrm is a fantastic alternative to goodreads.

bookwyrm.social/about

BookWyrm

Social Reading and Reviewing

^{bookwyrm.social}

Here’s a link you can use to share this post with your friends. The default share link makes you have to click to see the picture and many users will be confused and not click it.

photon.lemmy.world/post/lemmy.…

Happy #GlobalSwitchDay

A generic Lemmy server for everyone to use.

^{photon.lemmy.world}