Sonix

What it does

Sonix accepts audio or video files, either uploaded directly or submitted by URL through its API, and returns timestamped, speaker-labeled transcripts. Transcripts can be edited in the browser, translated into 54 or more languages, exported as text, subtitle, or media files, and analyzed with AI features that generate summaries, chapters, and sentiment analysis.

Journalists, researchers, filmmakers, and educators use Sonix to turn recordings into searchable text and captions, then share transcripts in a team workspace. Developers can automate the same work through a REST API, a command-line interface, or an MCP server. The product also supports multi-file analysis across folders of transcripts and aligning an existing transcript to its media.

Sonix is aimed at journalists, researchers, filmmakers, educators, and legal or healthcare teams. API access requires a paid subscription, while new accounts receive 30 free minutes to start. Enterprise plans and HIPAA or BAA arrangements are arranged through the sales team.

What it can do

• Transcribe audio and video in 54 or more languages with speaker labels and timestamps
• Translate transcripts into 54 or more languages
• Edit transcripts in the browser and export DOCX, PDF, TXT, SRT, and VTT files
• Generate AI summaries, chapters, and sentiment analysis from recordings
• Run analysis across multiple transcripts in a folder
• Burn subtitles into video and provide a REST API for programmatic use

Works with

• Zapier
• Webhook events via API

Example workflows

Transcribe an interview recording

Input: an MP3 interview file uploaded in the web app. Steps: upload the file, select the language, wait for processing, then review speaker labels and timestamps in the browser editor. Output: a timestamped, speaker-labeled transcript exportable as DOCX, PDF, or TXT.

Batch-generate captions via API

Input: media files submitted to the REST API with an API key. Steps: POST each file to the media endpoint, poll media status until completed, then request SRT output with caption settings. Output: subtitle files (SRT) for each recording.

Before you choose

• API access is limited to paying subscribers; trial accounts must request a key by email.
• Pricing is per hour of media transcribed; AI analysis hours are measured by the length of recordings, not processing time.

Listed under

• Productivity
• Meetings and notes
• AI analysis
• Captions
• Journalists
• Legal
• Media
• Medical

Get started

New accounts receive 30 free minutes.

1. Create a Sonix account and start the free trial from the sign-up page.
2. Upload an audio or video file in the web app and confirm the language setting.
3. For API use, obtain an API key from the account page (paid subscription required) and send requests with a Bearer authorization header to https://api.sonix.ai/v1.

Pay As You Go is single-user with no subscription; subscription plans include bundled hours and charge extra hours at $10/hr. The free allowance is 30 minutes for new accounts, applied to the first upload if minutes are purchased. Prices are in USD.

Source: sonix.ai/pricing, checked 29 Oct 2026. Prices can change; check before you buy.

Sources for this overview

Product pages, documentation, and pricing checked 29 Oct 2026. Each source supports part of the overview; availability and prices can change.

• AI Transcription Software: 99% Accuracy in 54+ Languages | Sonix ↗sonix.ai
• Pricing: The most affordable speech-to-text platform | Sonix ↗sonix.ai
• Sonix | API Documentation | Sonix ↗sonix.ai

Company website

sonix.ai: product, pricing and policy pages

YC directory mirror

Batch and company name

Social accounts

Accounts the company links, and its posts on X

Human review

Checked by a person

knowledge_base

Last checked 29 Oct 2026. Every field keeps its source and date; unknown means we couldn’t confirm it.