A NeuTTS Air alternative in 31 languages
NeuTTS Air from Neuphonic is an on-device text to speech model built on a Qwen 0.5B language model backbone. It clones a voice from about 3 seconds of audio, ships GGUF builds for phones, laptops and Raspberry Pi, watermarks its output and speaks English; the smaller NeuTTS-Nano models add French, German and Spanish.
SuperClonica runs Supertonic 3, an open model of about 99 million parameters, in 31 languages on an ordinary processor. This guide compares them honestly; we have not benchmarked NeuTTS, so there are no speed or quality scores for it here, only facts from its repository and model card.
Where NeuTTS Air is strong
Instant cloning from a few seconds of audio is its main feature, and the GGUF builds make it easy to run fully on device. Output is watermarked, which helps where you must show that speech is synthetic. NeuTTS-2E adds emotional control in English.
Setup and size
NeuTTS needs espeak-ng installed for phonemes, and the Air model on Hugging Face asks for your affiliation and role before download. Its backbone alone is a 0.5B model. Supertonic 3 is about 99 million parameters with no extra system packages: install the engine with python -m pip install superclonica-cpu and run superclonica --text "Hello" --voice F1 --lang en --output hello.mp3.
Languages and ready voices
NeuTTS covers English, Spanish, German and French depending on the model. Supertonic 3 speaks 31 languages, from Polish and Czech to Japanese, Korean and Hindi, and every voice speaks all of them. SuperClonica adds about 190 catalog voices, from narrators to game and anime characters, each bought once; the ten stock voices are free and may be used commercially.
Which to choose
Choose NeuTTS Air for quick cloning from a short clip, watermarked output or an English voice on a phone. Choose SuperClonica for 31 languages on a CPU, ready character voices, voices you train in the studio from a longer recording, and a speech API with a free tier of 3 minutes a day.