AssemblyAI vs Sonix
AssemblyAI uniquely has 5 features · Sonix uniquely has 3 features.
| AssemblyAI | Sonix | |
|---|---|---|
| Company | ||
| Founded | 2017 | 2017 |
| HQ | San Francisco, USA | San Francisco, USA |
| AI model | Universal-3.5 Pro (Proprietary) | Proprietary ASR + Neural MT |
| User base | Millions of developers | 6.2M+ |
| Platforms | Web, API (all platforms via SDK) | Web, iOS, Android |
| Languages | 99 (Universal-2), 18 (Universal-3.5 Pro) | 54+ |
| Pricing | ||
| Free plan | Yes | No |
| Free trial | Yes-unlimited (free tier, no credit card required — up to 185 hours pre-recorded, 333 hours streaming) | Yes — 30 minutes, no credit card required |
| Starting price | $0.15/hr | $10/hr (Pay As You Go) |
| Enterprise | Custom pricing with custom rate limits, enhanced concurrency, and enterprise-grade flexibility | Custom pricing |
| All plans | Free TierFreeUniversal-3.5 Pro$0.15/hrUniversal-3.5 Pro$0.21/hrEnterprise / CustomCustom | Pay As You Go$10/hr usageCore$25/moAdvanced$50/moPro$80/moEnterpriseCustom |
| Positioning | ||
| Best for | Developers and enterprises building voice AI applications, transcription services, and voice agents | Healthcare, legal, media, and research teams needing accurate, secure transcription at scale |
| Differentiator | Native code switching and highly accurate speaker diarization; async speech-to-text trained on 12.5M+ hours of audio | SOC 2 Type II and HIPAA-compliant transcription with 99% accuracy across 54+ languages, purpose-built for regulated industries like healthcare and legal |
| Competitors | Deepgram, OpenAI Whisper, Google Speech-to-Text, Amazon Transcribe, Rev.ai | Otter.ai, Rev.com, Descript, Trint, Happy Scribe |
| Features | ||
| Async Speech to Text | ✓ | — |
| Async Transcription | ✓ | — |
| Code Switching | ✓ | — |
| Multi Language Support | ✓ | — |
| Speaker Diarization | ✓ | — |
| API Access | ✓ | ✓ |
| Audio Enhancement | ✕ | ✕ |
| Batch Processing | ✓ | ✓ |
| Commercial Rights | ✓ | ✓ |
| Languages Supported | ✓ | ✓ |
| Mobile App | ✕ | ✓ |
| Music Generation | ✕ | ✕ |
| Noise Removal | ✕ | ✕ |
| Podcast Editing | ✕ | ✓ |
| Text to Speech | ✕ | ✕ |
| Transcription | ✓ | ✓ |
| Voice Cloning | ✕ | ✕ |
| Voice Styles | ✕ | ✕ |
| Integrations | ||
| Adobe Audition | ✕ | ✕ |
| API Access | ✓ | ✓ |
| Garageband | ✕ | ✕ |
| Key Integrations | AWS Marketplace, GPT (LLM Gateway), Claude (LLM Gateway), Gemini (LLM Gateway), Community LLM Models, Python SDK, REST API, WebSocket Streaming API | Zoom, Microsoft Teams, Google Meet, Webex, Zapier, Adobe Premiere |
| Zapier | — | ✓ |