Sonomos FAQ — Privacy, Browsers, Plans, AI Tools

Is the current Sonomos product the final version?

No. The Sonomos browser extension is a prototype / proof of concept, released so we can validate the local-first PII protection approach with real users in regulated industries. It’s safe to use day-to-day, but expect rough edges and a focused list of fully-supported AI platforms.

The production-grade successor — Sonomos Desktop — is in active development. It’s a native app that protects PII system-wide (including native AI apps, IDE assistants, local LLMs, clipboard, screenshots, and dragged-in files). See the Sonomos Desktop overview and roadmap.

When will Sonomos Desktop be available?

Sonomos Desktop is in active development with private beta planned ahead of general availability. Specific dates are not yet public — email info@sonomos.ai with subject line “Desktop beta” to join the early access list.

Does Sonomos send my data to any external server?

No. Sonomos processes everything locally in your browser. Detection, masking, and image analysis all run on-device. The only external communication is for account authentication and payment processing. No page content, detected PII, or user text is ever transmitted.

This is intentionally true of both the prototype extension and the upcoming Sonomos Desktop app.

Is Sonomos open source?

The extension itself is not open source. However, our architecture is transparent and built on a local-first, zero-data-exfiltration principle. We’re happy to walk through it with security teams under NDA — contact info@sonomos.ai.

Which browsers are supported?

Any Chromium-based browser: Chrome 110+, Edge 110+, Brave, Arc, Vivaldi, and Opera. Firefox support is under evaluation. Safari is not currently supported — Sonomos Desktop will be the recommended path for macOS-first workflows.

Does Sonomos work on mobile?

Not currently. Browser extensions on mobile platforms have very limited capability. Sonomos is designed for desktop browsers where AI tools are primarily used. Mobile support is not on the near-term roadmap; Sonomos Desktop is also desktop-only at launch (macOS and Windows primary, Linux best-effort).

Will Sonomos work with Claude Desktop, ChatGPT Desktop, Cursor, Windsurf, or Ollama?

Not in the browser extension — a browser extension fundamentally cannot see traffic from a native app. These are explicit launch targets for Sonomos Desktop, which is exactly the gap it’s designed to close.

Does Sonomos have anything for Claude Code today?

Yes — Canary is Sonomos’s open-source PII monitor for Claude Code. It runs locally, scans every message and file operation, and keeps a redacted count of what you’ve shared with Claude. It’s a separate product from the browser extension and Sonomos Desktop, and it installs into Claude Code with two slash commands. See Installing Canary.

Can my employer see what I detect or mask?

Only if you’re on a Teams plan. Team admins can see aggregate detection and masking statistics per member — but not the actual text content. Detection details, the underlying prompts, and the redacted PII stay on your device.

Does Sonomos slow down my browser?

The impact is minimal on modern hardware. AI-powered detection runs most efficiently on devices with GPU acceleration. Initial page scans may take 1–2 seconds on very long pages. Pattern-based detectors are effectively instantaneous. Sonomos Desktop will further reduce overhead by running native code paths instead of inside a browser tab.

What happens if Cloak misses something?

Send Guard acts as a fallback — it monitors form submissions and alerts you when PII is detected, even on platforms Cloak doesn’t natively cover. Together, Cloak + Send Guard provide defense in depth.

If a detection is genuinely missed (a false negative on a category Sonomos should catch), please report it through the Send Feedback form in the popup. False negatives are the highest-priority signal for tuning Dagger.

Can I use Sonomos with self-hosted AI tools?

Yes. Dagger (detection) works on any webpage regardless of the platform. Cloak’s automatic masking targets specific platforms, but Send Guard will activate on any site where PII is detected in form fields. If you have a high-volume internal AI surface you’d like Cloak to fully support, get in touch — those integrations directly inform the Sonomos Desktop roadmap.

What’s the difference between Cloak and Send Guard?

• Cloak automatically rewrites outgoing messages to remove PII before the AI platform sees them. It’s transparent — you don’t have to do anything. It only works on platforms Sonomos has explicitly integrated with.
• Send Guard warns or blocks before you submit on platforms Cloak doesn’t natively cover. You make the call — edit, dismiss, or acknowledge.

You almost always want both on. See Cloak and Send Guard for the deep dive.

Why does Sonomos request broad host permissions?

So it can scan page content on the page, locally, on whichever site you happen to be on. Without this permission, detection would be limited to a manually-maintained allowlist of sites — which would defeat the purpose. The permission does not allow Sonomos to read browsing history, modify pages beyond injecting the detection widget, or transmit page content externally.

See the Permissions Reference for the full breakdown.

How do I cancel my subscription?

Log in to my.sonomos.ai, go to Settings → Billing, and click Cancel subscription. You’ll retain access to your paid features until the end of your current billing period. For full details, see Billing & invoices.

How do I report a bug or request a feature?

Use the feedback form in the Sonomos popup (click the toolbar icon → Send Feedback). Reports are sent to our team at info@sonomos.ai. Prototype users’ bug reports and feature requests directly shape the Sonomos Desktop roadmap, so specific feedback is hugely valuable.