Open-Source Licenses

Last updated: June 6, 2026

Margo is built with the following open-source software.

Translation & speech

• Whisper — MIT — speech recognition (via sherpa-onnx)
• SMALL-100 — MIT — machine translation
• Piper — MIT — text-to-speech
• eSpeak-NG — GPLv3 — long-tail fallback voices

Other

• ML Kit Text Recognition v2 — photo & live OCR
• Azure Cognitive Services Speech & Neural TTS — online speech & voice
• Anthropic Claude / Google Gemini — AI Tutor (beta)

Source & full license text

• Whisper — github.com/openai/whisper
• SMALL-100 — huggingface.co/alirezamsh/small100
• Piper — github.com/rhasspy/piper
• eSpeak-NG — github.com/espeak-ng/espeak-ng
• ML Kit — developers.google.com/ml-kit