Estimated Belliste score, based on the available capabilities, quality, features and pricing information. It is an indicative profile estimate, not an independent benchmark.
How this profile estimate is calculated
Capabilities contribute 35%, quality wording 30%, listed features 20%, and pricing 15% when available. When capability fields are absent, specialization breadth supplies a 25% fallback. Missing categories are omitted and the remaining weights are rescaled. The estimate uses each model’s own published profile; it does not measure answer accuracy or replace a hands-on test.
OverviewFish Audio S2 ProChatterbox Multilingual
PriceFree tier available · API from $15/1M UTF-8 bytesFree · Open source (MIT)
SpecializationTTS · Voice Cloning · Multilingual Speech · Emotion Control · Real-time AudioVoice Cloning · Multilingual TTS · Voice Conversion · Emotion Control · Voice Agents
QualityHighly expressive speech with fine-grained control over prosody, emotion, pacing and delivery.Natural multilingual speech with expressive control and strong speaker similarity.
FeaturesVoice Cloning · API · Streaming · Multilingual · Emotion ControlZero-shot Voice Cloning · Voice Conversion · Multilingual · Emotion Control · Self-hosting
Capabilities
15 specifications +
SpecificationFish Audio S2 ProChatterbox Multilingual
Number of voicesNot specifiedNot specified
Text-to-SpeechYesYes
Voice cloningInstant voice cloning supportedZero-shot
DubbingSupported through Fish Audio workflowsNot specified
Supported languages80+ languages23+ languages
Voice conversionNot listed as a core S2 Pro capabilityYes
Real-time audioYes · streamingFaster-than-realtime inference
Emotion controlOpen-ended natural-language direction tagsExaggeration / intensity control
Voice designAvailable through Fish Audio platform plansNot specified
Speech-to-SpeechNot listed as a core S2 Pro capabilityNot specified
Voice libraryAvailable through Fish Audio platformNot specified
Emotion Control15,000+ open-ended direction tagsExaggeration / emotion intensity control
Voice CloningInstant voice cloningZero-shot voice cloning
Voice ConversionNot specifiedYes
Voice DesignAvailable on platform plansNot specified
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