Speech to text
Sonix: review, pricing, data and alternatives
Sonix lets people working with audio and video files transcribe them and correct text in a synchronized editor. It also supports transcript translation, subtitle export, and shared review by teams. There is no free tier; the first paid plan costs $10 pay as you go. Access and transparency score: 60/100, #8 of 15 in its category.
What is Sonix?
Sonix lets people working with audio and video files transcribe them and correct text in a synchronized editor. It also supports transcript translation, subtitle export, and shared review by teams.
According to its documentation, Sonix lets you:
- transcribe audio and video files
- correct text in a synchronized editor
- translate transcripts
- create and export subtitles
- share transcripts for team review
We file it under Speech to text, the category of tools to transcribe audio to text, and it also overlaps with subtitles and dubbing and aI translation. The category lists 15 verified tools on this site.
The publisher is Sonix, Inc., based in United States. The service launched in 2017, which gives it some track record.
Who is it for?
It is mostly useful to these profiles: podcasters, video creators, researchers, and lawyers. The need it covers is simple to state: transcribe audio to text.
Sonix is a good candidate if:
- you plan to connect it to your tools or automations through its API
Before deciding, run a trial on a real task and measure the time saved: it is the only criterion that really counts.
How much does Sonix cost?
Pricing model: paid. No permanent free plan is offered.
The first paid plan costs $10 pay as you go (Pay As You Go: USD 10 per hour of media, prorated to the second; initial 30-minute trial), according to the pricing page, checked on October 24, 2026.
To estimate what the same work would cost done directly with an AI model, use our API price calculator. Prices change often: always check the official site before subscribing.
Data and privacy
According to its privacy policy, data is processed in the United States.
For professional use, check that a data processing agreement (DPA) is offered, and do not send customers' personal data or confidential documents without one.
Exporting your content: yes (details on the official site). Being able to get your data back makes switching tools easier later.
Three habits apply to every AI tool:
- turn off the use of your content for training if the option exists
- use a work account separate from your personal account
- review everything the tool produces before publishing or sending it
Platforms, languages and API
Sonix runs on: web browser and API.
Interface languages are not specified.
A public API lets you call it from your own programs or an automation tool, and plug it into an AI agent.
How we scored it
Our 60/100 score does not judge output quality: it measures what can be publicly verified about access to the tool, its openness and how far the publisher can be trusted.
| Criterion | Points | What counts |
|---|---|---|
| Access | 10/30 | free tier, published price, French interface |
| Openness | 20/30 | API, data export, open code |
| Trust | 30/40 | identified publisher, declared hosting, age, presence in reference lists |
The full calculation is explained on our method page.
Comparison with alternatives
Sonix against other tools in the speech to text category:
| Tool | Free | Entry price | API | Score |
|---|---|---|---|---|
| Sonix | No | $10 pay as you go | Yes | 60 |
| Whisper | Yes | $0.01 pay as you go | Yes | 95 |
| AssemblyAI | Yes | $0.15 pay as you go | Yes | 78 |
| Rev | Yes | $0.25 pay as you go | Yes | 75 |
| Wispr Flow | Yes | $12 per month | Yes | 73 |
| Vibe | Yes | not published | Yes | 68 |
| Deepgram | Yes | $0 pay as you go | Yes | 65 |
| HappyScribe | Yes | £102 per year | Yes | 65 |
Verdict
Sonix is a decent option; compare its price and terms with the category leaders.
Strengths
- Public API
- Established since 2017
Limitations
- No free tier
Avoid if…
- You handle sensitive personal data without a processing agreement
Alternatives
- Whisperfree tier
- AssemblyAIfree tier
- Revfree tier
- Wispr Flowfree tier
- Vibefree tier
- Deepgramfree tier
Categories and jobs
Learn more
Frequently asked questions
Is Sonix free?
No, there is no permanent free plan. The first paid plan costs $10 pay as you go.
Where is Sonix data stored?
According to the publisher, in the United States.
Does Sonix have an API?
Yes, a public API is documented.
What are the alternatives to Sonix?
In the same category: Whisper, AssemblyAI, Rev, and Wispr Flow.
Sonix or Whisper: which one to choose?
Whisper has a free tier, Sonix does not, Sonix starts at $10 pay as you go, Whisper at $0.01 pay as you go, and our score is 60/100 for Sonix and 95/100 for Whisper. Try both on the same task before paying.
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Neutrality. No affiliate links. No vendor pays to be reviewed, rated or ranked. Reviews are directed by François Chollet, neutral and factual, and every data point is dated and sourced. How we score