MARS5

by Camb.ai

Camb.ai's open-source MARS5 multilingual TTS reference.

TL;DR

Camb.ai's open-source MARS5 multilingual TTS reference.

Best for researchers benchmarking multilingual zero-shot TTS in low-resource languages. Pricing: free (AGPL-3.0).

Category
Open source
License
—
Stars
—
Last push
—
Pricing
free (AGPL-3.0)
Platforms
Linux

What it is

MARS5 is the open-source reference implementation of Camb.ai's multilingual TTS model. AGPL-3.0 — stronger copyleft than MIT/Apache. Used by researchers benchmarking low-resource language coverage. Consent posture: open weights — operator-side enforcement.

Best for: Researchers benchmarking multilingual zero-shot TTS in low-resource languages.
Watch out for: AGPL-3.0 — network copyleft; commercial users may prefer the hosted Camb.ai product.

Install / use

git clone https://github.com/Camb-ai/MARS5-TTS

Features

Speaker diarizationNo
Word-level timestampsNo
Streaming / real-timeNo
Languages supported140
HIPAA eligibleNo

MARS5 vs Whipscribe

FeatureMARS5Whipscribe
CategoryOpen sourceTranscription APIs
Pricingfree (AGPL-3.0)free beta
Speaker diarization—Yes
Word timestamps—Yes
Streaming—No
Languages14099
PlatformsLinuxWeb, API, MCP

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