This is a tentative list of public XMPP (Jabber) servers that provide a Tor Onion Service (.onion address) for connections from within the Tor network. By public I mean, servers that are free for everyone to use and place no barriers on registration.
| Clearnet domain | Tor Hidden Service | In-Band registration | XEP compliance |
|---|---|---|---|
| 5222.de | fzdx522fvinbaqgwxdet45wryluchpplrkkzkry33um5tufkjd3wdaqd.onion | links to web form | 100% |
| cock.li | xdkriz6cn2avvcr2vks5lvvtmfojz2ohjzj4fhyuka55mvljeso2ztqd.onion | disabled | 30% |
| dismail.de | 4colmnerbjz3xtsjmqogehtpbt5upjzef57huilibbq3wfgpsylub7yd.onion | disabled | 100% |
| hot-chilli.net | chillingguw3yu2rmrkqsog4554egiry6fmy264l5wblyadds3c2lnyd.onion | links to web form | 100% |
| jabber.cat | 7drfpncjeom3svqkyjitif26ezb3xvmtgyhgplcvqa7wwbb4qdbsjead.onion | disabled | 100% |
| jabber-germany.de | gku6irp4e65ikfkbrdx576zz6biapv37vv2cmklo2qyrtobugwz5iaad.onion | links to web form | 100% |
| jabber.systemausfall.org | jaswtrycaot3jzkr7znje4ebazzvbxtzkyyox67frgvgemwfbzzi6uqd.onion | links to web form | 95% |
| jabber.tcpreset.net | ae3w7fkzr3elfwsk6mhittjj7e7whme2tumdrhw3dfumy2hsiwomc3yd.onion | links to web form | 100% |
| jabbim.com | mrbenqxl345o4u7yaln25ayzz5ut6ab3kteulzqusinjdx6oh7obdlad.onion | has captcha | 65% |
| jabjab.de | jabjabdea2eewo3gzfurscj2sjqgddptwumlxi3wur57rzf5itje2rid.onion | has captcha | 100% |
| jabbers.one | 32qywqnlnqzbry42nmotr47ebts3k6lhiwfob6xniosmepz2tsnsx7ad.onion | enabled | 100% |
| magicbroccoli.de | gois4b6fahhrlsieupl56xd6ya226m33abzuv26vgfpuvv44wf6vbdad.onion | has captcha | 100% |
| pimux.de | 2n3tvihf4n27pqyqdtcqywl33kbjuv2kj3eeq6qvbtud57jwiaextmid.onion | disabled | 100% |
| qwik.space | qwikoouqore6hxczat3gwbe2ixjpllh3yuhaecixyenprbn6r54mglqd.onion | disabled | 95% |
| skynetcloud.site | xmppccwrohw3lmfap6e3quep2yzx3thewkfhw4vptb5gwgnkttlq2vyd.onion | disabled | 100% |
| trashserver.net | xiynxwxxpw7olq76uhrbvx2ts3i7jagqnqix7arfbknmleuoiwsmt5yd.onion | links to web form | 100% |
| xmpp.is | 6voaf7iamjpufgwoulypzwwecsm2nu7j5jpgadav2rfqixmpl4d65kid.onion | enabled | 100% |
In-Band registration is listed separately from other XEPs because it enables Tor users to register accounts without ever contacting a clearnet webserver.
Thanks everybody for the suggestions. I've now updated the list with v3 onion addresses, deleted the now offline servers and added new ones.