IndexTTS

by Bilibili

Bilibili's open-source TTS — Chinese + English bilingual.

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TL;DR

Best for chinese-market developers needing bilingual TTS with zero-shot cloning. Pricing: free (Apache-2.0 code, custom weight license).

Category
Open source
License
NOASSERTION
Stars
★ 22.5k
Last push
2026-08-04
Pricing
free (Apache-2.0 code, custom weight license)
Platforms
Linux

What it is

IndexTTS is Bilibili's open-source TTS model — strong Mandarin support with zero-shot voice cloning. Apache-2.0 code; weights under a separate license. Consent posture: open weights — operator-side enforcement.

Best for: Chinese-market developers needing bilingual TTS with zero-shot cloning.
Watch out for: Code is Apache-2.0 but weights have a separate license; mainly Chinese + English coverage.

Install / use

git clone https://github.com/index-tts/index-tts

Features

Speaker diarizationNo
Word-level timestampsNo
Streaming / real-timeNo
Languages supported2
HIPAA eligibleNo

Links

GitHub repo ↗

IndexTTS vs Whipscribe

FeatureIndexTTSWhipscribe
CategoryOpen sourceTranscription APIs
Pricingfree (Apache-2.0 code, custom weight license)$4–$24 one-time packs (credits never expire) · $2 single unlock · 60 min free on signup
Speaker diarization—Yes
Word timestamps—Yes
Streaming—No
Languages299
PlatformsLinuxWeb, API, MCP

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