Asterisk

See https://github.com/alphacep/vosk-asterisk

Freeswitch

See https://github.com/alphacep/freeswitch/tree/master/src/mod/asr_tts/mod_vosk

Jigasi

See https://github.com/jitsi/jigasi/pull/294

Unimrcp

See the plugin for unimrcp server https://github.com/alphacep/unimrcp-vosk-plugin/tree/vosk-plugin