AssemblyAI vs Sonix
A side-by-side look at AssemblyAI vs Sonix: pricing, free plans and features, taken from each official website. Prices change often, so check the linked sources.
| Feature | AssemblyAI | Sonix |
|---|---|---|
| Type | Tool · Transcription | Tool · Transcription |
| Made by | unknown | unknown |
| What it does | Speech AI API | Automated transcription |
| Pricing model | Paid | Paid |
| Free tier | unknown | unknown |
| Current prices | unknown | unknown |
| Modalities | unknown | unknown |
| Key features | unknown | unknown |
| Context window | unknown | unknown |
| API | unknown | unknown |
| License | Proprietary service | Proprietary service |
| Web app | unknown | unknown |
| Mobile apps | unknown | unknown |
| Desktop app | unknown | unknown |
| Links | Website ↗Deekoya listing | Website ↗Deekoya listing |
AssemblyAI vs Sonix: pricing and features
AssemblyAI
AssemblyAI provides a Speech AI API for transcription and speech understanding. It offers pre-recorded, real-time, and sync transcription endpoints along with voice agent and guardrail capabilities.
Pricing
Pricing is listed per hour of audio processed. Examples from the official site include $0.15 /hr for the Universal-3 model, $0.21 /hr for Universal-2, $0.05 /hr for Included Prompting, $0.02 /hr for certain Universal-2 tiers, $0.04 /hr for Speaker Diarization, $0.10 /hr for PII Text Redaction, and $0.45 /hr for custom rate limits with enhanced concurrency. These rates were read directly from AssemblyAI’s pricing page.
Key features
- Understand context, intent, and meaning
- Power agentic workflows in real time
- Scale securely from MVP to production
- Pre-recorded Speech-to-Text API
- Realtime Speech-to-Text API
- Speaker Diarization (available on select tiers)
Source: official homepage, official pricing page · checked 2026-10-27
Sonix
Sonix is an AI-powered transcription service that converts audio, video and document files into searchable text. The platform emphasizes high accuracy across more than 50 languages and offers tools for analysis, subtitles and integrations.
Pricing
According to the official site, Sonix offers a Pay As You Go rate of $10 per hour. The Core plan costs $25 per month or $275 per year and includes 5 hrs/mo (60 hrs/yr) of transcription and 25 GB storage. The Advanced plan is $50 per month or $550 per year, providing 20 hrs/mo (240 hrs/yr) and 50 GB storage. The Pro plan is $80 per month or $880 per year, with 40 hrs/mo (480 hrs/yr) and 100 GB storage. Additional hours on any subscription are billed at $10 per hour. These prices were read from the official site.
Key features
- Convert files for transcription
- Speaker identification with time-aligned labels
- Topic and section detection
- Key statements and decision extraction
- Metadata including timestamps, confidence, language, source
- Fast, automatic transcription (verbatim and real-time options)
Source: official homepage, official pricing page · checked 2026-10-27
FAQ
Which is free, AssemblyAI vs Sonix?
AssemblyAI: has a free plan or trial per its official site; Sonix: has a free plan or trial per its official site.
What is the difference between AssemblyAI vs Sonix?
AssemblyAI: AssemblyAI provides a Speech AI API for transcription and speech understanding. Sonix: Sonix is an AI-powered transcription service that converts audio, video and document files into searchable text.