Side by side
Altered Studio vs IndexTTS
Both stand on text-to-speech software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APIMacSelf-hosted+2
Altered Studio combines voice transformation, production, and transcription tools, with a free plan and annual-billed paid plans. Check the monthly morphing allowance, desktop GPU requirement, and lack of mobile support before choosing it.
Visit Altered Studio Free plan APILinuxSelf-hosted+2
IndexTTS provides voice cloning, audio controls, and both browser and Python interfaces. Before use, review the bilibili Model Use License Agreement and its disclaimer; commercial use inquiries go to the project.
Visit IndexTTSThe facts
| Altered Studio | IndexTTS | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | No | Not published |
| Runs on | API, Mac, Self-hosted, Web, Windows | API, Linux, Self-hosted, Web, Windows |
| Lowest paid plan | Creator: $30 a month | Free or on request |
| Plans published | 4 | 1 |
| Maker | Altered Studio | Not published |
| Website | altered.ai | github.com |
| On text-to-speech software | #10 of 223 | #25 of 223 |
Altered Studio: what it does well
- Voice morphing retains the speaker’s performance
- Transcription and translation in 75+ languages
- Rapid Voice Clone uses 4–8 seconds of audio
- RealTime Pro routes audio through a virtual microphone
- Free plan includes 10,000 AI tokens
What to know first
- Free plan includes 3 minutes of voice morphing monthly
- Desktop version requires a Windows PC with an 8GB+ Nvidia GPU
- Mobile devices are not currently supported
IndexTTS: what it does well
- Clones a voice from one reference audio clip.
- Supports five languages in IndexTTS-2.5.
- Includes emotion, speed, and pronunciation controls.
- Provides a WebUI, Python API, and serving recipe.
What to know first
- Setup instructions call for Git and uv.
- CUDA installation errors prompt a CUDA Toolkit 12.8-or-newer recommendation.
- Pinyin control in IndexTTS-2 covers only supported vocabulary cases.
Alternatives to Altered Studio Alternatives to IndexTTS The whole list