A voicemail transcript is automatically generated text from a voicemail audio recording. Modern speech-to-text (the same kind that powers iOS dictation and Android voice typing) is good enough that voicemail transcripts are typically 90%+ accurate for clear speakers.
The practical benefit: you triage voicemails like emails. The lockscreen notification shows the transcript ("Hey, this is Jane calling from Acme — wondering if you can review the contract before Friday"), and you decide whether to call back tonight or tomorrow without listening to audio.
Kelir generates transcripts for every voicemail on every plan. Originals (audio + transcript) are stored encrypted. Default retention is 90 days on Solo, longer on Team plans, configurable on Team Pro.