Mimic 3 (Mycroft)

by Mycroft (archived)

Mycroft's neural TTS — designed for Raspberry Pi voice assistants.

TL;DR

Mycroft's neural TTS — designed for Raspberry Pi voice assistants.

Best for self-hosted voice assistants — Home Assistant / Rhasspy pairing with offline TTS on a Pi. Pricing: free (AGPL-3.0).

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

What it is

Mimic 3 is the third generation of Mycroft's neural TTS, designed for low-resource devices like the Raspberry Pi. 25 languages, 100+ voices. AGPL-3.0. Used widely with Home Assistant and Rhasspy for fully offline voice assistants. Consent posture: synthetic-only.

Best for: Self-hosted voice assistants — Home Assistant / Rhasspy pairing with offline TTS on a Pi.
Watch out for: Mycroft AI shut down; community-maintained fork active. AGPL-3.0 license has stronger network-copyleft terms than MIT.

Install / use

git clone https://github.com/MycroftAI/mimic3

Features

Speaker diarizationNo
Word-level timestampsNo
Streaming / real-timeNo
Languages supported25
HIPAA eligibleNo

Mimic 3 (Mycroft) vs Whipscribe

FeatureMimic 3 (Mycroft)Whipscribe
CategoryOpen sourceTranscription APIs
Pricingfree (AGPL-3.0)free beta
Speaker diarization—Yes
Word timestamps—Yes
Streaming—No
Languages2599
PlatformsLinux, Raspberry PiWeb, API, MCP

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Whipscribe is a managed faster-whisper + whisperX service. If you want transcripts without running infrastructure, paste a URL or drop a file in the form below — you'll have a transcript in seconds.