Rev is an American speech-to-text company that provides closed captioning, subtitles, and transcription services. The company, based in San Francisco and Austin, was founded in 2010 and raised $4.5 million in funding. Its 50,000 independent contract workers transcribe audio for a per-minute rate. The service is used by major companies including Amazon and Microsoft. PC Magazine named the service an "Editor's Choice" in 2018, and ranked it as the best transcription service in 2019.