Email Security Built Into Your Gmail Inbox.
The CyberCheck360 Gmail add-on runs automatically on every email you open and also checks sender authentication, domain signals, and every link before you act on anything.
Works with Gmail and Google Workspace. Analyses SPF, DKIM, DMARC, sender domain age, and every link automatically.
What it checks
What the Add-on Checks On Every Email
Every email you open is automatically analysed. No manual action, no IT configuration, no training required for your team.
Email Header Analysis
- SPF check (pass / fail / softfail)
- DKIM signature validation
- DMARC policy alignment
- Return-path vs sender domain comparison
- Sender domain age and newly registered domains flagged
- Reply to mismatch detection
Link Scanning
- Every URL in the email body checked against live threat intelligence
- Domain reputation and category lookup
- Malicious links flagged inline and visible without clicking
- Shortened URL expansion and analysis
Sandbox Access
- Click "Open in Sandbox" on any link to view it in an isolated cloud browser
- Full screenshot of where the link leads without visiting it on your device
- Free users: 3 sandbox sessions per day
- Paid users: unlimited sandbox with file scanning and full session recording
Who it's for
Built for Teams That Can't Afford a Breach
You don't need a dedicated security team to be protected. CyberCheck360 works for any team running Gmail or Google Workspace.
Google Workspace Admins at 25-500 Person Companies
Get full org wide visibility of every link clicked across your organisation without adding headcount. The admin dashboard shows everything. Setup takes hours, not weeks.
Finance Teams Handling Supplier Payments
Attackers target finance teams with fake invoices and spoofed supplier emails. Sender domain age checks and return path analysis catch these before your team acts on them.
Legal Teams With High-Value Client Communications
Law firms and professional services handle millions in client funds via email. One spoofed conveyancing email can be career ending. Every sender is verified automatically.
Healthcare Organisations With GDPR Obligations
A phishing breach in healthcare isn't just an IT incident it's a patient data violation with ICO consequences. CyberCheck360 provides the audit trail regulators expect to see.
How it works
Three Steps to a Protected Inbox
No email routing changes. No DNS record updates. No admin permissions required for individual users.
Open Any Email in Gmail
The add-on sidebar appears automatically on the right side of your inbox. No action required analysis starts immediately when you open a message.
See the Full Security Analysis
Authentication results, sender domain age, link verdicts are all visible at a glance without any manual action. Green means safe. Anything else tells you why.
Act with Confidence or Report With One Click
Flag suspicious emails, open links in sandbox, or report the message directly from the sidebar. No need to raise an IT ticket. No waiting for someone else to act.
Pricing
Free to Start. More When You Need It.
Install for free from Google Workspace Marketplace. Upgrade when your team needs admin visibility, unlimited sandboxing, and organisation-wide controls.
| Feature | Free | Paid |
|---|---|---|
| SPF / DKIM / DMARC analysis | ||
| Sender domain age check | ||
| Plain text preview | ||
| Manual link scanning | ||
| Link reputation check | ||
| Sandbox - screenshot view | 3/day | Unlimited |
| Preview link before click | ||
| Automated link scanning | ||
| Admin dashboard & audit trail | ||
| Org-wide link blocking |
Complete coverage
Gmail Protected. But What About the Rest of Your Browsing?
The Gmail add-on protects your inbox. But phishing doesn't only arrive by email. Pair it with the browser extension and Outlook add-on for complete coverage across every surface.
Learn How Email Authentication Works
Understand the protocols that protect your email and why they're not enough on their own.
More Ways to Stay Protected
Pair the Gmail add-on with our browser extension and Outlook add-on for protection wherever you work.