Sentinel silently scans every email the moment it arrives — detecting threats, tracking pixels, and spoofed senders before you ever click.
Unlike other tools, Sentinel doesn't wait for you to click. It scans first.
The moment an email arrives in Gmail, Sentinel analyses it automatically in the background using 15 detection rules. No clicks required.
Every threat gets a plain-English explanation. "This tracking pixel would have revealed your IP address and confirmed your email is active." Free for everyone.
Ask Claude anything about a flagged email. "What is the attacker trying to do?" "Is this a targeted attack?" Turns every threat into a learning moment.
15 rules across every major phishing vector.
1x1 invisible images that spy on when you open emails
"PayPal" sent from paypa1-support.ru
amaz0n.com, paypa1-secure.net, g00gle.com
Links to raw IPs instead of domains
Links that bounce through multiple servers to hide the destination
Forms and password fields inside email bodies
Artificial deadlines and account suspension threats
Reply-To differs from sender to intercept responses
Invisible content used to manipulate spam filters
.tk, .ml, .cf — free domains used by attackers
@ symbol tricks that hide the real destination
.exe, .bat, .ps1 files mentioned in email body
Full protection is always free. Pay only for AI explanations.
After payment, your access token is emailed within seconds. Paste it into the extension to unlock AI.
We built Sentinel so we technically cannot read your emails.