Extensible Messaging and Presence Protocol (XMPP, yomwe poyamba inkatchedwa Jabber) ndi njira yolumikizirana yotseguka yopangidwira kutumizirana mameseji pompopompo (IM), zambiri za kupezeka, ndi kukonza mndandanda wa olumikizana nawo. Kutengera XML (Extensible Markup Language), imathandizira kusinthana kwakanthawi kochepa kwa data pakati pa mabungwe awiri kapena kuposerapo. Zopangidwa kuti ziwonjezeke, ndondomekoyi imapereka mapulogalamu ambiri kupitilira IM yachikhalidwe mumalo otakata a media okhudzana ndi uthenga, kuphatikiza ma signature a VoIP, kanema, kusamutsa mafayilo, masewera ndi ntchito zina.