AssemblyAI vs Speechify
AssemblyAI uniquely has 7 features · Speechify uniquely has 6 features.
| AssemblyAI | Speechify | |
|---|---|---|
| Company | ||
| Founded | 2017 | 2017 |
| HQ | San Francisco, USA | Los Angeles, USA |
| AI model | Universal-3.5 Pro (Proprietary) | Proprietary (SIMBA voice model) |
| User base | Millions of developers | 60M+ |
| Platforms | Web, API (all platforms via SDK) | Web, iOS, Android, Chrome Extension, Edge Extension, Mac App, Windows App |
| Languages | 99 (Universal-2), 18 (Universal-3.5 Pro) | 60+ |
| Pricing | ||
| Free plan | Yes | Yes |
| Free trial | Yes-unlimited (free tier, no credit card required — up to 185 hours pre-recorded, 333 hours streaming) | — |
| Starting price | $0.15/hr | $29/mo (Premium, monthly) |
| Enterprise | Custom pricing with custom rate limits, enhanced concurrency, and enterprise-grade flexibility | Custom (Speechify for Enterprise & EDU listed separately) |
| All plans | Free TierFreeUniversal-3.5 Pro$0.15/hrUniversal-3.5 Pro$0.21/hrEnterprise / CustomCustom | FreeFreePremium$29/mo |
| Positioning | ||
| Best for | Developers and enterprises building voice AI applications, transcription services, and voice agents | Students, professionals, and people with dyslexia or ADHD who want to listen to any text content hands-free |
| Differentiator | Native code switching and highly accurate speaker diarization; async speech-to-text trained on 12.5M+ hours of audio | All-in-one voice AI layer combining text-to-speech, voice typing dictation, AI podcasts, meeting notes, and a voice AI assistant across every major device and platform |
| Competitors | Deepgram, OpenAI Whisper, Google Speech-to-Text, Amazon Transcribe, Rev.ai | NaturalReader, Murf AI, ElevenLabs, Otter.ai, NotebookLM, Wispr Flow |
| 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 | Google Drive, Dropbox, Microsoft OneDrive, Google Docs, Gmail, Chrome Extension, Edge Extension |