Privacy Policy
Your voice stays on your machine. Period.
Last Updated: February 7, 2026
The Short Version
MurmurTone processes your voice 100% locally on your computer. We don't collect, store, or transmit your voice data, transcriptions, or usage patterns. The only network communication is a one-time license validation when you activate a Pro license.
1. Our Privacy Commitment
MurmurTone was built with privacy as a core principle, not an afterthought. We believe your voice data is deeply personal and should never leave your control. That's why:
- All speech recognition happens locally on your Windows computer
- Your voice recordings are never transmitted to any server
- Your transcriptions stay on your machine and are never uploaded
- No analytics, tracking, or telemetry is built into the application
- The app works completely offline after initial setup
2. What Data We Collect
Data We DO NOT Collect
| Data Type | Collected? | Notes |
|---|---|---|
| Voice recordings | Processed locally, never transmitted | |
| Transcription text | Stays on your computer | |
| Usage patterns | No analytics or telemetry | |
| Microphone audio | Only captured when hotkey is held | |
| Screen content | Application does not access screen | |
| Browsing history | Application does not access browser | |
| Personal files | Only accesses its own data folder |
Data We DO Collect (Minimal)
| Data Type | When | Purpose |
|---|---|---|
| License key | Pro activation only | Validate your purchase |
| Machine ID | Pro activation only | Prevent license sharing |
| Email address | Purchase only | Deliver license key |
3. Local Data Storage
MurmurTone stores the following data locally on your computer in %APPDATA%\MurmurTone:
- Settings: Your preferences (model selection, hotkey, audio settings)
- Speech models: Downloaded AI models for transcription (~75MB-1.5GB)
- Custom vocabulary: Words you've added for improved recognition
- License file: Your Pro license activation (if purchased)
- Log files: Application logs for troubleshooting (can be deleted)
You can delete all local data by uninstalling MurmurTone or removing the %APPDATA%\MurmurTone folder.
4. Network Communications
MurmurTone makes network requests only in these specific situations:
Model Downloads (First Use)
When you first use MurmurTone, it downloads the speech recognition model from Hugging Face's servers. This is a one-time download. After this, the app works completely offline.
License Activation (Pro Users)
When you activate a Pro license, MurmurTone contacts our license server to validate your purchase. This transmits:
- Your license key
- A machine identifier (hardware hash)
No voice data, transcriptions, or usage information is ever transmitted.
AI Text Cleanup (Optional)
If you enable the AI text cleanup feature, that processing also happens 100% locally on your machine - no cloud services are involved.
5. Third-Party Services
Hugging Face (Model Downloads)
Speech recognition models are downloaded from Hugging Face. Their privacy policy applies to the download process. See: huggingface.co/privacy
Formspree (Contact Form)
Our contact form uses Formspree to process submissions. When you submit the form, your name, email address, and message are transmitted to Formspree's servers for delivery to our support team. Formspree retains submission data for 30 days. See: formspree.io/legal/privacy-policy
Payment Processing (Polar)
If you purchase a Pro license, payment is processed by Polar, our merchant of record (powered by Stripe). Your payment information is handled entirely by Polar's hosted checkout page.
What Polar receives: your email address, payment card details, and billing address.
What we receive: your email address, order ID, and transaction amount only.
What we NEVER receive or store: credit card numbers, CVV codes, or full payment card details. All payment data is processed by Polar/Stripe and never touches our systems.
6. Children's Privacy
MurmurTone is not directed at children under 13. We do not knowingly collect any personal information from children.
7. Data Security
Since we don't collect or transmit your voice data or transcriptions, there's no risk of this data being breached from our servers. Your data security depends on your local computer's security.
For Pro license activation, we use industry-standard HTTPS encryption with SSL certificate verification for the license validation request. Your license key is stored locally using Windows DPAPI encryption (tied to your Windows user account) and is never stored in plain text on disk.
Payment webhook communications are verified using HMAC-SHA256 signatures to prevent forged requests.
8. Your Rights
Because MurmurTone doesn't collect personal data beyond license activation, traditional data rights (access, correction, deletion) apply primarily to:
- Email address: Contact us to update or delete your email from our license records
- Local data: You can delete all local data by removing
%APPDATA%\MurmurTone - License deactivation: Contact us to deactivate your license from a machine
9. Changes to This Policy
If we make changes to this privacy policy, we will update the "Last Updated" date at the top. For significant changes, we will provide notice through the application or via email (for Pro users).
Our commitment to local processing and not collecting voice data will not change.
10. Contact Us
If you have questions about this privacy policy or MurmurTone's privacy practices:
- Email: support@murmurtone.com
Privacy by Design
MurmurTone's architecture makes privacy violations technically impossible. Your voice is processed by AI models running on YOUR computer. There's no server to hack, no cloud to breach, no data to leak. That's not just a policy - it's how the software works.