Psi

Psi is a free instant messaging application designed for the XMPP network.

Instant messaging client · psi-im.org

Open Psi in AirStack

What Psi’s own pages say

What it says it doesPsi is a free instant messaging application designed for the XMPP network. psi-im.org
PlatformsLinux, Windows, macOS psi-im.org
Free planYes psi-im.org
Open sourceYes psi-im.org

Each value is a quote AirStack found on the product’s own pages, read 2026-11-04. A missing field means AirStack has not found it on its pages.