AssemblyAI vs Castmagic
Castmagic uniquely has 7 features · AssemblyAI uniquely has 5 features.
| AssemblyAI | Castmagic | |
|---|---|---|
| Company | ||
| Founded | 2017 | 2022 |
| HQ | San Francisco, USA | San Francisco, USA |
| AI model | Universal-3.5 Pro (Proprietary) | Proprietary (GPT-based) |
| User base | Millions of developers | 100K+ |
| Platforms | Web, API (all platforms via SDK) | Web |
| Languages | 99 (Universal-2), 18 (Universal-3.5 Pro) | 60+ |
| Pricing | ||
| Pricing model | — | Subscription |
| Free plan | Yes | No |
| 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 |
| Enterprise | Custom pricing with custom rate limits, enhanced concurrency, and enterprise-grade flexibility | From $699/mo — Business & Scale plan |
| All plans | Free TierFreeUniversal-3.5 Pro$0.15/hrUniversal-3.5 Pro$0.21/hrEnterprise / CustomCustom | Hobby$29/moStarter$69/moTeam$199/moBusiness and scalefrom $699/mo |
| Positioning | ||
| Best for | Developers and enterprises building voice AI applications, transcription services, and voice agents | Content teams, agencies, podcasters, and marketers repurposing audio/video into multi-format content assets |
| Differentiator | Native code switching and highly accurate speaker diarization; async speech-to-text trained on 12.5M+ hours of audio | All-in-one AI content operating system that turns a single audio or video recording into 100+ multi-format content assets with brand voice training, semantic search, team workflows, and a Claude MCP connector |
| Competitors | Deepgram, OpenAI Whisper, Google Speech-to-Text, Amazon Transcribe, Rev.ai | Descript, Otter.ai, Riverside.fm, Podcastle, Opus Clip |
| Features | ||
| AI Strategist + Magic Chat | — | ✓ |
| Async Speech to Text | ✓ | — |
| Async Transcription | ✓ | — |
| Audio & Video Playback | — | ✓ |
| Code Switching | ✓ | — |
| Custom Prompts | — | ✓ |
| Editing & Collaboration | — | ✓ |
| Multi Language Support | ✓ | — |
| Speaker Diarization | ✓ | — |
| Timestamps | — | ✓ |
| 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, Google Drive, Zapier, RSS, YouTube, TikTok, Instagram, Vimeo, Twitch, Loom, Wistia, Apple Podcasts, X (Twitter), Claude MCP connector |
| Zapier | — | ✓ |