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.
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.
Sonix is an AI transcription platform for audio and video that also offers translation, subtitles and AI analysis of transcripts. You upload a file, get a transcript in a web editor, and edit it with the audio. It advertises transcription and translation in more than 54 languages, and the website itself is available in 11 languages including Japanese, Chinese and German.

The product page names integrations with Zoom, Zapier and Adobe Premiere, along with Microsoft Teams, Google Meet and Webex, and offers an API. There is a mobile recorder app and admin tools for teams. Sonix, Inc. is based in San Francisco and says it has operated since 2017. The site lists SOC 2 Type II, a HIPAA-compliant claim and a no-training-on-customer-data statement, and mentions ISO 27001 and AES-256 encryption.
There are two ways to pay. Pay As You Go is $10 per hour of media, prorated to the second, with no subscription and no AI workspace. Subscriptions are Core at $25 a month (5 hours), Advanced at $50 (20 hours) and Pro at $80 (40 hours), each including one user, with extra seats at $25 a month. Annual billing is $275, $550 and $880 a year. Extra hours on a subscription cost $10 each. Enterprise is custom.
New accounts get 30 free minutes of transcription with no credit card. There is no permanent free plan, so the free minutes work as a trial.
No permanent free plan. New accounts get 30 free minutes of transcription with no credit card required.
Pay As You Go is $10 per hour. Subscriptions are Core $25, Advanced $50 and Pro $80 per month, each with included hours.
The site lists SOC 2 Type II and HIPAA-compliant claims and says customer data is not used for training.
Website: https://sonix.ai/
Company: Sonix, Inc.
Web transcription, subtitles and translation in 54+ languages with team features. No permanent free plan (30 free minutes); Pay As You Go $10/hour, subscriptions from $25/month.
| Pricing model | Paid |
|---|---|
| Free tier | No free plan |
| Starting price | $25 / month |
| Data residency | Not verified |
| Compliance (as stated by vendor) | SOC 2 Type II (claimed), HIPAA (claimed), ISO 27001 (claimed) |
| Integrations | Zoom, Zapier, Adobe Premiere, Microsoft Teams, Google Meet, Webex |
| 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; Sonix is useful when you want a ready transcript editor and subtitle export. |
| Last verified | 2026-10-10 by editor |
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