Cartesia vs Castmagic
Cartesia and Castmagic are both audio AI tools, tracked here on price, platforms, integrations, and capabilities. Every figure below is read from the vendor's own pages and dated. No score and no winner: the facts do the picking.
Cheapest paid tier each vendor publishes. Free plans are listed above; tiers priced on request are not plotted because there is no figure to plot.
Cartesia
Real-time speech synthesis, transcription, and voice agent platform
Cartesia provides real-time voice intelligence powered by state space models, featuring Sonic-3.6 for text-to-speech and Ink-2 for transcription. Developers can build voice agents through Managed Agents or deploy custom implementations across cloud, on-premise, and on-device environments. The platform includes developer SDKs, instant voice cloning, and telephony support.
Castmagic
AI content platform for audio and video repurposing
Castmagic is an AI content platform that converts audio and video recordings into transcripts, show notes, newsletters, and social media posts. The platform supports over 60 languages and integrates with tools like Zoom, Google Drive, and Zapier. Content teams and creators collaborate in shared workspaces to draft and publish assets in their brand voice.
At a glance
Capability tags are factual labels we assign when a tool is added; they describe what a tool does, not how well it does it.
Checked against the vendors. Written from each vendor's own site and last re-checked there: Cartesia (under review since September 3, 2026) · Castmagic on August 31, 2026. Vendors change pricing and features without notice, so confirm anything that decides your purchase on the vendor's page.
Also in audio
A tool we have an affiliate relationship with. It is not part of the comparison above and we are not calling it the better pick.
- Creating realistic voiceovers for video and e-learning content
- Building low-latency real-time conversational voice agents
- Translating and dubbing videos into multiple languages
Key features
Cartesia
- Sonic-3.6 text-to-speech model
- Ink-2 streaming speech-to-text transcription
- Managed Agents for building and shipping voice agents
- Cloud, on-premise, and on-device deployment options
- Instant and professional voice cloning
Castmagic
- Automated speaker-labeled transcription in over 60 languages
- AI asset drafting for show notes, newsletters, blogs, and social posts
- Custom brand voice parameters and editable content templates
- Team workspaces with user permissions and approval workflows
- Semantic library search to locate quotes and key moments
What each one does well
Cartesia
- ✓ Building real-time conversational voice agents
- ✓ Low-latency streaming speech transcription and generation
- ✓ Deploying voice AI models on-premise or on-device
Castmagic
- ✓ Repurposing podcast and video recordings into social posts, newsletters, and blogs
- ✓ Content teams and agencies managing multi-brand client media pipelines
- ✓ Transcribing and summarizing meetings, webinars, and sales calls
People also ask
Which is cheaper, Cartesia or Castmagic?
Cartesia. Paid plans start at $5/mo for Cartesia and $19/mo for Castmagic.
Does Cartesia or Castmagic have a free plan?
Cartesia has a free plan, and Castmagic publishes no free plan.
What is the difference between Cartesia and Castmagic?
Both are tracked for speech-to-text, transcription. Of the capabilities they do not share, only Cartesia is tracked for text-to-speech, voice-cloning, voice-generation, ai-agents, and only Castmagic is tracked for speaker-identification, summarization, brand-voice, marketing-content.
How much do Cartesia and Castmagic cost?
Cartesia: free plan, then $5/mo. Castmagic: from $19/mo.
Answers are generated from the tracked plans and capability tags shown above, so they move when the vendors' pages do.
Full fact sheets, FAQs, and discussion links: Cartesia · Castmagic · all audio tools