Privacy Policy
Last updated: June 2026
The Short Version
Antimatter collects no data. It is fully local software that runs on your own devices.
Data Collection
Antimatter, as open-source software, collects zero telemetry, analytics, or usage data. Specifically:
- ❌ No crash reports are sent to any server.
- ❌ No analytics events are tracked.
- ❌ No usage statistics are collected.
- ❌ No personal information is transmitted to any third party.
- ❌ No identifiers (device ID, IP address, user email) are sent anywhere.
What Data Stays on Your Devices
All data generated by Antimatter stays between your desktop machine and your mobile phone:
| Data | Stored Where |
|---|---|
| Ed25519 cryptographic keypair | OS Keychain (macOS/Windows/Linux) |
| 256-bit pairing token | OS Keychain |
| AI agent conversations & trajectory steps | Local Room (Android) / CoreData (iOS) database |
| Workspace file contents | Transmitted in real-time, never stored by Antimatter |
| Terminal session I/O | Real-time, never persisted |
Network Traffic
Antimatter routes WebSocket traffic through a Cloudflare tunnel. This means:
- Cloudflare acts as a relay between your phone and your machine.
- All traffic is TLS-encrypted at the Cloudflare edge.
- All payload content is additionally AES-GCM encrypted (E2EE) before it reaches Cloudflare — Cloudflare only sees ciphertext.
- Cloudflare’s own Privacy Policy applies to the tunnel metadata.
Third-Party Services
Antimatter does not integrate with any third-party analytics, advertising, or data collection services. The only third-party infrastructure used is:
- Cloudflare — for tunnel relay (see their privacy policy for tunnel-level metadata).
- GitHub — for source code hosting and release distribution.
- F-Droid — for Android app distribution (fully FOSS, no tracking).
Open Source Transparency
All Antimatter code is publicly auditable on GitHub at github.com/saifmukhtar/antimatter. You can verify that no data collection occurs by reading the source code directly.
Contact
For privacy concerns or questions, open an issue on GitHub or email via the contact on saifmukhtar.dev.
