No copy with a third party
The audio stays on your computer. There is no account to hack and no server to subpoena.
Klarword is designed for a computer. You can read these pages here, but to transcribe, open the site on a desktop or laptop: the model weighs hundreds of megabytes and the computation runs on your machine.
Journalism
Sending an interview to a transcription service leaves a copy with a third party, who can be compelled to hand it over or have it stolen. For a source who asked for anonymity, that copy is one too many.
The audio stays on your computer. There is no account to hack and no server to subpoena.
Once the model is loaded, Klarword works without a network: on a train, abroad, on an air-gapped computer.
SRT and WebVTT export in 42-character lines, split at spaces, with no overlaps.