this post was submitted on 25 Feb 2026
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Matrix is not really integrated into the ActivityPub protocol the same way DMs usually are. I would have to open a separate application to message you on Matrix, I can’t just click on your profile and shoot you a DM (or can I?).
You cannot, two totally different protocols
There you go. So I think adding DMs to ActivityPub would add an extra level of convenience
I mean, there's nothing technically stopping one app supporting both protocols natively, especially since Lemmy already includes a field for people's profiles to link their Matrix ID. Though to my knowledge none do it yet.
Sure, in the same way there is nothing stopping Lemmy from using ATProto. The problem is all competing standards and what the developer chooses to use.
Perhaps, but I'm describing something slightly different. Your description is basically "one platform supporting two protocols that basically do the same thing". I'm talking more about "one app that has two separate-but-related bits of functionality, each using the more appropriate protocol for that job".
ActivityPub is only one of a number of federated protocols.
One notably unsuited to instant messaging.