PageSentry
Monitor any web page for changes — runs locally, never sends URLs.
Standalone $2.99/mo or $29.90/yr.
Why it matters
What PageSentry does that nothing else does
- Benefit 1:
100% local — your watch list and the URLs you check stay in your browser.
- Benefit 2:
On-device AI explains what changed in plain English (no API key required).
- Benefit 3:
Hourly free checks; competitors cap free tiers at six-hour intervals.
- Benefit 4:
Pro adds 15-minute checks, unlimited monitors, and full change history.
Pricing
Buy PageSentry alone, or get the bundle
Use only this extension? Buy it standalone. Use three or more Aegis extensions? The Pro Pack pays for itself.
Standalone
PageSentry Pro
$2.99/mo
Or $29.90/yr — save when paid annually.
Pro tier on PageSentry only. Cancel anytime.
Get PageSentry ProBest value
Save $21/yrAegis Pro Pack
$9.99/mo
Or $99/yr — covers every Aegis extension you install.
Unlocks Pro on PageSentry and every other Aegis extension. New extensions included automatically.
Get the Pro PackBuilt the Aegis way
Privacy you can verify, not just claim
On-device by default
Every Aegis extension runs in your browser. No silent cloud upload, no server-side processing of your activity.
Never sold, never bundled
Aegis extensions never change ownership. Updates come from the same publisher you trusted at install.
No account required
Install and use immediately. Pro features unlock with a single sign-in to your Aegis Pro Pack.
MV3-native
Built for Chrome Manifest V3 from day one — no deprecation warnings, no broken background pages.
Why switch
PageSentry vs Distill Web Monitor
Distill's free tier limits checks to every six hours and runs cloud monitoring (your watch list lives on their servers). WebMonitor AI checks hourly free, runs entirely in the browser, and never sends a URL to any server.
| Feature | PageSentry | Distill Web Monitor |
|---|---|---|
| Monthly price | $2.99/mo | $8.00/mo |
| Account required | No — install and use immediately | Often yes (varies by competitor) |
| Data leaves the browser | No — on-device by default | See competitor privacy policy |
| Ownership transfer risk | Aegis never sells extensions | Varies — see ExtensionWatch in this catalog |
| Bundled with Aegis Pro Pack | Yes — $9.99/mo unlocks every extension | No bundle |
See it in action
PageSentry screenshots
More screenshots and the full feature walkthrough live on the PageSentry landing page.
Common questions
- Where do my watched URLs live?
- In chrome.storage on your device. The extension never POSTs your watch list to a server. Distill's comparable tier puts the list on their cloud.
- How does the AI change explainer work?
- On-device browser AI compares the previous and current page snapshots and writes a plain-English diff. No diff data leaves the browser; there is no per-explanation API cost.
- Can I monitor pages behind login?
- Yes. The extension uses your existing Chrome session, so anything you can see in the browser, the monitor can see. Credentials are never asked for or stored.
- How does the Aegis Pro Pack unlock PageSentry?
- Sign in to aegisfirma.com from any installed Aegis extension popup. The cookie-auth flow detects your active Pro Pack and unlocks Pro features instantly — no license key to copy or paste.
- Where is my PageSentry data stored?
- PageSentry stores everything in chrome.storage on your device. Your subscription record lives in our payment provider's account; we do not aggregate browsing or activity data.
- Can I cancel PageSentry Pro anytime?
- Yes — billing stops at the end of the current period. Pro features remain active until the period ends, then drop back to the free tier.
- Why should I trust an extension I just heard of?
- Aegis extensions never change ownership and never sell user data. We publish security audit results and ship MV3-native code so Chrome itself enforces the permissions we claim.
Try PageSentry free, upgrade when ready
Free tier covers the basics. Pro Pack at $9.99/mo unlocks every Aegis extension at once.