Rev.ai

by Rev.ai

The API spin-off of Rev — strong English accuracy, topic detection, custom vocab.

Category
Transcription APIs
License
—
Stars
—
Last push
—
Pricing
from $0.02/min
Platforms
API

What it is

Rev.ai is the developer API from Rev, historically a human-transcription service. The "Machine" endpoint is competitive on English and supports custom vocabulary that handles jargon better than generic Whisper. HIPAA-eligible on appropriate plans. Last price check: 2026-04-20.

Best for: English-heavy workloads where vocabulary customization matters (medical, legal, technical).
Watch out for: Pricier than Whisper-based APIs; non-English coverage narrower.

Install / use

POST https://api.rev.ai/speechtotext/v1/jobs

Features

Speaker diarizationYes
Word-level timestampsYes
Streaming / real-timeYes
Languages supported36
HIPAA eligibleYes

Alternatives

OpenAI Whisper API
OpenAI

Hosted Whisper large-v3 from OpenAI — $0.006 per minute.

$0.006/min
AssemblyAI
AssemblyAI

Universal-2 model + diarization, PII redaction, topic detection, summarization.

from $0.37/hr
Deepgram
Deepgram

Nova-2 model, excellent streaming, strong at conversational audio.

from $0.0043/min

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