Head to head / AI Transcription
AssemblyAI vs Sonix
- →AssemblyAI has a free tier to start; Sonix does not.
- →AssemblyAI is cheaper to start ($0.15/hr vs $10/hr).
| Compared | AssemblyAI | Sonix |
|---|---|---|
| Accuracy (tested) | 96.9% | Not tested |
| Starting price | $0.15/hr | $10/hr |
| Free tier | Yes | — |
| Visit AssemblyAI | Visit Sonix |
Feature by feature
| Feature | AssemblyAI | Sonix |
|---|---|---|
| Languages | 99+ | 50+ |
| API | Yes | Yes |
| Real-time | Yes | No |
| Speaker labels | Yes | Yes |
| Export formats | JSON, TXT, SRT, VTT | TXT, SRT, VTT, DOCX, PDF |
| Human option | No | No |
AssemblyAI
Developers who want a speech-to-text API with built-in audio intelligence like summarization, sentiment, and LLM queries.
- +Universal-2 model, strong English accuracy
- +LeMUR runs LLMs over your transcripts
- +Sentiment, topics, PII redaction built in
- +Generous free credit to start
Sonix
Multilingual teams and researchers who need fast, self-serve automated transcription in many languages.
- +50+ languages with solid accuracy
- +In-browser editor with search and highlights
- +Automated transcript translation
- +Clean subtitle and export workflow
Compared on the metrics we track for this category. Prices are the cheapest paid tier. Some links are affiliate links.