@liaizon I just had a look at our statistics. This is a list of all working platforms my system knows of:
+---------------------------------+-------+
| platform                        | total |
+---------------------------------+-------+
| mastodon                        | 11830 |
| wordpress                       |  2332 |
| pleroma                         |  1476 |
| nextcloud                       |  1261 |
| peertube                        |  1234 |
| gotosocial                      |   573 |
| writefreely                     |   560 |
| misskey                         |   520 |
| friendica                       |   462 |
| pixelfed                        |   425 |
| akkoma                          |   383 |
| microblog                       |   317 |
| hugo                            |   246 |
| hubzilla                        |   206 |
| element                         |   194 |
| owncast                         |   173 |
| funkwhale                       |   163 |
| hometown                        |   130 |
| diaspora                        |   125 |
| mobilizon                       |   120 |
| birdsitelive                    |    87 |
| castopod                        |    86 |
| honk                            |    82 |
| blogger                         |    76 |
| activityrelay                   |    75 |
| lemmy                           |    75 |
| ghost                           |    60 |
| plume                           |    56 |
| gnusocial                       |    55 |
| bookwyrm                        |    54 |
| jekyll                          |    50 |
| aoderelay                       |    42 |
| takahe                          |    33 |
| foundkey                        |    32 |
| gancio                          |    29 |
| calckey                         |    28 |
| epicyon                         |    17 |
| write.as                        |    16 |
| mediawiki                       |    16 |
| gravcms                         |    16 |
| gatsby                          |    14 |
| tumblr                          |    14 |
| nextcloud social                |    14 |
| ktistec                         |    13 |
| ecko                            |    13 |
| discourse                       |    11 |
| dokuwiki                        |    11 |
| zap                             |    10 |
| drupal                          |    10 |
| publii                          |     9 |
| org-mode                        |     9 |
| hexo                            |     8 |
| lotide                          |     7 |
| riot                            |     6 |
| bludit                          |     6 |
| eleventy                        |     6 |
| snac                            |     5 |
| polr                            |     5 |
| socialhome                      |     4 |
| dolphin                         |     4 |
| nikola                          |     4 |
| joomla                          |     4 |
| cherrypick                      |     4 |
| movim                           |     4 |
| spip                            |     4 |
| mitra                           |     4 |
| divi                            |     4 |
| nanoc                           |     4 |
| bonfire                         |     4 |
| typo3                           |     4 |
| osada                           |     3 |
| prosody                         |     3 |
| wix.com                         |     3 |
| odoo                            |     3 |
| webflow                         |     3 |
| medium                          |     3 |
| known                           |     3 |
| chevereto                       |     3 |
| mattermost                      |     3 |
| brighteon                       |     3 |
| hedgedoc                        |     3 |
| pub-relay                       |     3 |
| contao                          |     3 |
| kbin                            |     3 |
| smithereen                      |     2 |
| pelican                         |     2 |
| basekit                         |     2 |
| feditools-relay                 |     2 |
| castopod host                   |     2 |
| big-cartel                      |     2 |
| sequel                          |     2 |
| xagcms                          |     2 |
| movable-type                    |     2 |
| wxwclub                         |     2 |
| guppe groups                    |     2 |
| nginx                           |     2 |
| bbedit                          |     2 |
| pelican-activitypub             |     2 |
| meow                            |     2 |
| apd                             |     2 |
| brutalinks                      |     2 |
| vuepress                        |     2 |
| helloworld                      |     2 |
| statusnet                       |     2 |
| fedibird                        |     2 |
| docutils                        |     2 |
| https://github.com/davecheney/m |     2 |
+---------------------------------+-------+