Instead of Altered Studio
Altered Studio alternatives
Altered Studio combines voice transformation and production tools in one platform. It can change a speaker’s voice while retaining performance, create speech from text, clone voices from 4–8 seconds of audio, clean and denoise recordings, edit audio, apply DSP effects, and process batches. Transcription and translation cover 75+ languages, while text-to-speech voice-over supports 70+ languages. The free plan allows 3 minutes of voice morphing per month; paid plans start at $30 per month when billed annually.
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iSpeech
Free plan Open source AndroidAPIExtension+5Developers needing speech APIs and recognition — iSpeech focuses on text-to-speech and speech recognition APIs, SDKs, and online tools rather than Altered Studio’s voice-morphing production suite.
Free plan · paid from $2.95/mo Visit site - 2
Vocalware
by VocalwareFree trial AndroidAPIiPhone+4Real-time website and mobile text-to-speech — Vocalware is a cloud API for real-time text-to-speech with over 100 voices in more than 20 languages.
From $99.50 · 15-day trial Visit site - 3
Voice RSS
Free plan AndroidAPIiPhone+4Simple cloud text-to-speech API — Voice RSS converts text to audio through a synchronous cloud API, with 49 languages, 100 voices, and five output codecs.
Free plan · paid from $5/mo Visit site - 4
KittenTTS
Free plan AndroidAPIiPhone+5Local open-source text-to-speech and cloning — KittenTTS is a free, CPU-capable local library with zero-shot cloning, 47 voices, 20 languages, and WAV output.
Open source Visit site - 5
Resemble AI
Free plan AndroidAPIExtension+6Multimodal AI-content detection — Resemble AI focuses on detecting AI-generated audio, video, and images, with explanations and multimodal watermarking.
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TTSReader
Free plan AndroidAPIExtension+4Reading documents and webpages aloud — TTSReader reads documents, PDFs, e-books, and webpages aloud and exports synthesized speech, unlike Altered Studio’s broader morphing toolkit.
Free plan · paid from $10.99/user/mo Visit site - 7
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Bland AI
Free plan APISelf-hostedWeb - 10
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Google Cloud Text-to-Speech
Free plan AndroidAPIiPhone+1 - 12
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Kits AI
Free plan APIWebWindows - 15
Hume AI
Free plan APIiPhoneMac+1 - 16
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LOVO AI
Free plan APIWeb - 19
Retell AI
Free plan APISelf-hostedWeb - 20
Vapi
Free plan AndroidAPIiPhone+1 - 21
Voicemod AI Voice Cleaner
Free plan AndroidiPhoneMac+1 - 22
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PolyAI
Paid APIWeb - 29
OpenAI Text-to-Speech
Paid API
An alternative may fit better if your work centers on API speech services, document narration, local open-source models, or real-time voice changing. Altered supports API, macOS, web, and Windows access, but API access is for Enterprise customers, mobile devices are unsupported, and desktop use specifies a Windows PC with an 8GB+ Nvidia GPU. Compare whether you need morphing and recorded-audio tools or mainly text-to-speech, recognition, cloning, detection, or narration. Also weigh language coverage, export formats, commercial use, platform access, and entry price.