Cartesia provides text-to-speech (Sonic), speech-to-text (Ink) and voice agent APIs for developers, with voice cloning on paid plans. Free plan has 20K credits a month; Pro is $5 a month.
Rev offers AI transcription, human transcription and captions, plus legal and evidence tools. The free plan includes 45 AI minutes per user per month; Essentials is $29.99 a month and human transcripts are $1.99 per minute.
Rev combines AI transcription with human-verified services. The current home page presents it as a platform that turns case evidence, meaning audio, video, images and documents, into a searchable and citable record, and it also sells transcription and captioning to general users. AI transcription is included with subscriptions and advertised at 96% accuracy or higher, returned in minutes. Human transcription is advertised at 99% or higher within 12 hours.

Services listed include human captions in English and Spanish, legal rough-draft and premium legal transcripts, self-service court reporting, subtitles in 17 languages, and deposition summaries now under Rev Legal. The platform has a document editor in beta, image analysis, transcript editing and clipping, and AI templates for items such as chronologies. A mobile recording app is on the App Store and Google Play, and a developer API for speech-to-text is hosted at rev.ai. Files can be uploaded from Clio, Dropbox, Box, Google Drive or OneDrive.
The site lists SOC 2 Type II with an SOC 3 report available, GDPR compliance, and CJIS- and HIPAA-compliant environments on Unlimited plans, plus encryption, SSO and multi-factor authentication.
Subscriptions are per seat. Free gives 45 AI minutes per user per month for one seat. Essentials is $29.99 a month ($25.49 on annual billing) with 5,000 AI minutes and up to 3 seats, and Pro is $59.99 ($47.99 annual) with 10,000 minutes. Unlimited is custom. Human transcription is $1.99 per minute, with subscription discounts.
Yes. The Free plan includes 45 AI minutes per user per month for one seat.
Human transcription is $1.99 per minute, with subscription discounts available.
SOC 2 Type II with an SOC 3 report, GDPR compliance, and CJIS- and HIPAA-compliant environments on Unlimited plans.
Website: https://www.rev.com/
AI plus human transcription and captions, with legal tools. Free 45 AI minutes a month; Essentials $29.99/seat monthly; human transcripts $1.99/min. Homepage now leads with legal evidence.
| Pricing model | Freemium |
|---|---|
| Free tier | Yes · Free plan: 45 AI minutes per user per month, 1 seat |
| Starting price | $29.99 / month |
| Data residency | Not verified |
| Compliance (as stated by vendor) | SOC 2 Type II (claimed), GDPR (claimed) |
| Integrations | Clio, Dropbox, Box, Google Drive, OneDrive |
| Public API | Yes |
| Self-hostable | Not verified |
| Official site | Not verified |
| Can a general AI assistant replace it? | A general LLM cannot transcribe audio files itself and cannot give a certified human transcript; use Rev when accuracy or legal use matters. |
| Last verified | 2026-10-10 by editor |
Cartesia provides text-to-speech (Sonic), speech-to-text (Ink) and voice agent APIs for developers, with voice cloning on paid plans. Free plan has 20K credits a month; Pro is $5 a month.
The OpenAI API is OpenAI's developer platform for text, image and audio models, billed per use and separate from ChatGPT. Speech-to-text is listed from $0.0045 per minute; no free credit is mentioned on the pricing page.
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Sonix is a web-based AI transcription, translation and subtitle service for audio and video in 54+ languages, with an API and integrations. New accounts get 30 free minutes; subscriptions start at $25 a month.
Deepgram offers speech-to-text, text-to-speech and Voice Agent APIs for developers, in the cloud or self-hosted. It advertises $200 in free credit, then pay as you go from about $0.0043 per minute for pre-recorded audio.
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