Alternatives to ZONOS2

ZONOS2 alternatives

ZONOS2's smallest published quantization is 4.58 GiB. The models below do the same job with a different trade — less memory, comparable size, or a more permissive licence.

From the file· sizes from summed file bytes

Meaningfully smaller

under 70% of its smallest quantization
ModelParamsSmallestQuantsLicence
Ace-Step1.5160M0.04 GiB116other
Qwen3-TTS-12Hz-0.6B-Base915M0.50 GiB10apache-2.0
OmniVoice613M0.56 GiB7apache-2.0
orpheus-3b-0.1-ft3.8B0.91 GiB22apache-2.0
VieNeu-TTS-0.3B244M0.19 GiB2cc-by-nc-4.0
neutts-air748M0.43 GiB6apache-2.0
s2-proMoE4.6B2.40 GiB7other
Fun-CosyVoice3-0.5B-2512—0.34 GiB3apache-2.0

Comparable in size

within ±40%, so a like-for-like swap
ModelParamsSmallestQuantsLicence
tada-3b-ml4.2B5.20 GiB3llama3.2
MOSS-TTS-Local-Transformer-v1.54.6B5.56 GiB3apache-2.0

More permissively licensed

licences that allow commercial use
ModelParamsSmallestQuantsLicence
Qwen3-TTS-12Hz-0.6B-Base915M0.50 GiB10apache-2.0
OmniVoice613M0.56 GiB7apache-2.0
orpheus-3b-0.1-ft3.8B0.91 GiB22apache-2.0
neutts-air748M0.43 GiB6apache-2.0
Fun-CosyVoice3-0.5B-2512—0.34 GiB3apache-2.0
VoxCPM22.3B1.57 GiB7apache-2.0
chatterbox264M0.17 GiB37mit
Kokoro-82M82M0.13 GiB4apache-2.0