Psylo, a newly launched iOS and iPadOS browser developed by privacy researchers Talal Haj Bakry and Tommy Mysk of Mysk, offers an innovative approach to protecting user privacy. Its key innovation: treating each browser tab as a separate “silo” with isolated storage, cookies, caching—and even a distinct IP address—shielded via the Mysk Private Proxy Network .
🛡️ Tab Silos: A Bold Redesign of Browsing
Unlike traditional browsers, where browsing sessions often leak across tabs, Psylo’s silo design provides:
- Per-tab isolation of storage, cookies, cache
- Dedicated IP addresses via Mysk’s proxy network
- Custom timezone and locale settings per tab
- Canvas fingerprint randomization unique to each session
Tommy Mysk told The Register: “Two Psylo tabs opening the same website would appear as though they originated on two different devices” .
🔍 Why Silos Matter Against Fingerprinting
Fingerprinting techniques aggregate device information—such as screen size, OS, timezone, language, IP, and canvas rendering—to uniquely identify users. Even VPN users remain vulnerable because browsers typically expose consistent metadata .
Psylo counters this by:
- Assigning distinct IP addresses for each tab
- Matching locale and timezone with each proxy region
- Hiding canvas fingerprinting by adding random noise per tab
This combination prevents websites from correlating browsing sessions across tabs or tracking over time.
🌐 Architecture Overview
Psylo’s architecture combines several critical components for deep privacy protection:
| Component | Function |
| WebKit framework | iOS-native browser engine with tab isolation |
| Mysk Proxy Network | Over 40 global, no-log proxy servers offering IP control per tab |
| Locale spoofing | Proxy-linked timezone and language settings per silo |
| Canvas randomization JS | Adds fingerprint noise within WKWebView limitations |
| No user accounts | Subscription managed via Apple, no personal data stored |
🕵️ Real-World Threat Context
Texas A&M researchers recently confirmed that browser fingerprinting is actively used for behavioral ad targeting. Their study linked fingerprinting methods to real online tracking via ad‑auction discrepancies .
Psylo launched the day before this study broke, offering countermeasures at a moment when awareness of browser tracking has never been more relevant .
🔒 Privacy Assurance & Limitations
Psylo addresses privacy both in traffic and metadata:
- All data flows via encrypted TLS channels; no plaintext HTTP leaks
- The app adheres to a no-log policy—ignoring IPs, browsing history, and identifiable metadata
- Only bandwidth usage is tracked, anonymously, for abuse prevention
Still, iOS constraints (WKWebView sandboxing) may limit defense strength compared to desktop browsers like Brave or Tor .
📲 Pricing and Availability
- Platforms: iOS and iPadOS
- Pricing: $9.99/month or $99/year
- Trial: 3-day free trial available
- Future plans: Android support pending user adoption
🧭 Who It’s Best For
Psylo suits users who want:
- Segmented browsing sessions (e.g., personal vs. work) with minimized data leakage
- Strong fingerprint protection beyond standard VPN + browser usage
- No-log privacy maintained by subscription without account sign-ups or data profiling
Less ideal for users needing traditional browsing workflows, Tor-equivalent anonymity, or cross-tab sharing.
⚔️ Competitive Context
Other privacy tools include:
- Brave browser – desktop canvas randomization via WebKit
- Safari private browsing + iCloud Private Relay – per-tab IP but possibly less spoofing flexibility
- Tor Browser – strong network-level anonymity, not available on iOS
Psylo’s tab-silo model and proxy integration carve a niche on mobile for users seeking advanced fingerprint masking.
🧵 Ecosystem Reactions
Forums like Wilders, PrivacyGuides, and Stackers have noted Psylo’s potential. Some users believe the tab-silo model mimics iCloud Private Relay features, but Psylo adds locale spoofing and more granular controls .
🔮 The Road Ahead
Psylo plans to:
- Expand proxy network beyond 40 global servers
- Explore JavaScript privacy defenses within WKWebView
- Launch Android version based on uptake
- Continue publishing technical blogs on browser engineering
Its success may shape how privacy-first browsing evolves on mobile platforms.
Final Take
Psylo is a significant step forward in mobile privacy. By isolating each browser tab into a silo with unique storage, IP, locale, and fingerprint defenses, it disrupts standard tracking pipelines. While it’s premium-priced and limited to iOS/iPadOS, Psylo offers a cutting-edge solution for users seeking definitive fingerprint resistance where VPNs and private browsing fall short.