Rev AI

Turning recorded or live audio into readable text is what Rev AI does. Rev AI is a speech-to-text API for developers that returns transcripts with proper grammar and punctuation, and it aims for a low word error rate.

You can send files through the asynchronous API or use the streaming API for audio as it happens.

Beyond plain transcription, it offers sentiment analysis, topic extraction, summarization and translation.

Language support is where you should read carefully.

Transcription covers multiple languages, but human transcription, sentiment analysis, topic extraction and summarization are English only.

Translation supports 11 languages.

For teams with compliance requirements, Rev AI lists SOC II, HIPAA, GDPR and PCI compliance.

That makes this AI transcription service easier to justify in regulated settings, though you still need to check that the English-only limits fit your project.