AssemblyAI vs Rev AI
AssemblyAI uniquely has 5 features.
| AssemblyAI | Rev AI | |
|---|---|---|
| Company | ||
| Founded | 2017 | 2010 |
| HQ | San Francisco, USA | San Francisco, USA |
| AI model | Universal-3.5 Pro (Proprietary) | Proprietary (trained on 7M+ hours of human-verified speech data) |
| User base | Millions of developers | — |
| Platforms | Web, API (all platforms via SDK) | Web, API, Cloud, On-Premises |
| Languages | 99 (Universal-2), 18 (Universal-3.5 Pro) | 57+ |
| Pricing | ||
| Free plan | Yes | Yes — free tier with limited credits to try the API |
| Free trial | Yes-unlimited (free tier, no credit card required — up to 185 hours pre-recorded, 333 hours streaming) | Yes — free trial available with no credit card required |
| Starting price | $0.15/hr | Pay-per-use (per minute of audio processed) |
| Enterprise | Custom pricing with custom rate limits, enhanced concurrency, and enterprise-grade flexibility | Custom — contact sales for enterprise pricing |
| All plans | Free TierFreeUniversal-3.5 Pro$0.15/hrUniversal-3.5 Pro$0.21/hrEnterprise / CustomCustom | — |
| Positioning | ||
| Best for | Developers and enterprises building voice AI applications, transcription services, and voice agents | Developers and enterprises needing high-accuracy speech-to-text API integration |
| Differentiator | Native code switching and highly accurate speaker diarization; async speech-to-text trained on 12.5M+ hours of audio | Rev AI offers industry-leading lowest Word Error Rate (WER) backed by 7M+ hours of human-verified training data, with significantly reduced bias across accents, genders, and ethnicities compared to competitors. |
| Competitors | Deepgram, OpenAI Whisper, Google Speech-to-Text, Amazon Transcribe, Rev.ai | AssemblyAI, Deepgram, Google Speech-to-Text, AWS Transcribe, OpenAI Whisper |
| 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 | REST API, Python SDK, Node.js SDK, Java SDK, cloud deployment, on-premises deployment |