Privacy Policy

Last updated: March 21, 2026

Summary

Byblos processes all voice and text locally on your device. We do not collect, store, or transmit your voice recordings, transcriptions, or any personal data.

What We Don't Collect

• Voice recordings — never leave your device
• Transcriptions — stored only on your local machine
• Usage analytics — none, zero telemetry
• Personal information — we don't ask for accounts or sign-ups
• Clipboard or screen content — processed locally, never transmitted

What We Do

• License validation — when you enter a license key, the app makes a single HTTPS request to LemonSqueezy's API (api.lemonsqueezy.com) to validate the key. This transmits only the license key and your computer's hostname. This is the only network request the app makes.
• Model downloads — when you download speech models through the app, files are fetched from Hugging Face (huggingface.co). No personal data is sent.

Local Processing

All speech recognition (Whisper), text processing (LLM), and agent features run entirely on your machine using local models. No audio or text is sent to any cloud service for processing.

Third Parties

• LemonSqueezy (payments) — handles license key purchases as Merchant of Record. Their privacy policy applies to the purchase transaction: lemonsqueezy.com/privacy
• GitHub (distribution) — hosts the open-source code and website
• Hugging Face (models) — hosts downloadable speech models

Data Storage

All app data is stored locally in ~/Library/Application Support/Byblos/:

• Transcription history (transcripts.json)
• Custom vocabulary (vocabulary.json)
• Speech models (.bin files)
• LLM models (.gguf files)
• App preferences (macOS UserDefaults)

You can delete all data at any time by removing this directory.

Open Source

Byblos is open source under the MIT license. You can audit the code to verify these claims: github.com/jb1999/byblos

Contact

Questions? Email support@byblos.im or open an issue on GitHub.

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