Know if an email is real
before you click.
SecureStamp checks who sent the email and analyzes the message on your device, warning you about suspicious links, attachments and scams before you lose money.
You do not need to understand cybersecurity. SecureStamp gives you a clear signal when an email looks real, suspicious or dangerous.
Check any email or domain
Paste a sender, email or domain. You get a simple result first, with technical details available if you need them.
The postal mail analogy
Like postal mail, but for email.
A certified letter helps you trust where a message came from. SecureStamp brings that idea to email and adds a clear warning before you click.
Postal mail
In plain words
SecureStamp looks at who is writing to you and what the message is asking you to do. If it sees a suspicious link, risky attachment or urgent request for money or passwords, it warns you before you act.
You do not need to read technical records. The plugin turns the analysis into a clear signal.
SecureStamp
How it works
Four simple steps
Install the plugin.
Add SecureStamp to the email client you already use.
Open your email.
No new habit. SecureStamp appears inside your normal inbox.
SecureStamp checks the sender and the message.
It combines sender trust signals with local message analysis on your device.
You see a clear warning before you click.
Looks trusted, be careful or high risk: one signal before links, files, payments or passwords.
What SecureStamp detects
Warnings for the things that usually cost money.
SecureStamp helps spot the risky patterns people miss when an email looks urgent or familiar.
Private by design
Your email text never leaves your device.
Message analysis happens locally. SecureStamp may send anonymous risk signals to improve detection, but never your email content.
For people and families
Safer email without learning cybersecurity.
Before you open a link, download a file, pay or share a password, SecureStamp checks the sender and the message.
- Clear signal when an email looks real, suspicious or dangerous.
- Local AI message analysis for phishing, scams and risky requests.
- Free protection that helps build a cleaner email network.
- Anonymous reports improve detection without exposing private messages.
billing@acmecorp.com
Tu factura de enero — $240
newsletter@tuservicio.co
Novedades de la semana
verify@microsoft-secure.top
Verificá tu cuenta ahora
info@banco-nacion.ar
Resumen de cuenta — Dic 2025
SecureStamp Plugin activo
Personal protection
A scam can cost you much more than a coffee. SecureStamp Personal costs less than one.
Protect your inbox before a suspicious link, attachment or password request turns into an expensive mistake.
Available integrations
Available where you work.
SecureStamp works across all major email clients. Plugins in development will be unlocked progressively.
Chrome + Gmail
Google Chrome
Chrome extension that verifies emails directly in Gmail. Detects phishing, shows trust indicators in your inbox and lets you send emails with a verified identity stamp.
Downloadv0.3.0Gmail Add-on
Google Workspace
Native Google Workspace Marketplace add-on. Installs in seconds from the Gmail panel with no browser extension required.
Outlook 365
Microsoft 365
Add-in for Outlook 365, Outlook Desktop (2016+) and Outlook Web App. Verifies senders in real-time and lets you insert an identity stamp in outgoing emails. Mass deployment available for organizations.
Outlook Desktop
Windows / Mac
Compatible with Exchange Server 2013+ and Microsoft 365. IT admins can deploy the add-in to the entire organization from Exchange PowerShell or M365 Admin Center in a single command.
Safari Extension
macOS / iOS
Safari Web Extension that verifies any site instantly. Auto-detects the active domain when you open the popup. Compatible with Safari on iPhone, iPad and Mac (Safari 15.4+).
Apple Mail
macOS / iOS
Native plugin for Apple Mail on macOS (Monterey+). Shows the SecureStamp trust badge in every email header. Developer Preview — requires Xcode.
Firefox
Mozilla Firefox
Firefox extension that works in Gmail, Outlook Web and other webmail clients. Compatible with Firefox on Windows, macOS and Linux.
Microsoft Edge
Microsoft Edge
Chromium-based Edge extension. Works in Gmail and Outlook Web. Available in the Microsoft Edge Add-ons Store.
Thunderbird
Mozilla
Thunderbird extension. Automatically verifies senders in the most popular open-source email client.
For companies
Protect your customers, vendors and members.
Help your customers recognize your official emails and detect suspicious messages pretending to be your brand.
Certify your official domains.
Register domains, publish verifiable trust records and make official emails easier to recognize.
Recommend SecureStamp to your audience.
Offer free protection to customers, vendors or members so they can verify emails before they click.
Reduce impersonation and support tickets.
Launch a trust protection program around verified communications and protected audience.
The stamp and the status
The stamp is art. The plugin is what verifies.
Stamp
It's a domain's visual certification. An artistic, collectible element that proves a company registered its identity with SecureStamp. If someone copies the stamp image, it's just a drawing — without the cryptographic token it has no validity.
Status indicator
The color the plugin shows in your email client. Green = verified, Amber = suspicious, Red = blocked. This IS verified in real-time against the backend — it cannot be faked with an image.
Plugin = the arbiter
The plugin is what connects to the backend and decides the status. No matter what image the email has — the plugin checks the token and the backend responds with the domain's real status.
Trust states
Four forced-choice states
SecureStamp uses a forced-choice Likert-style scale: no neutral middle. Level 5 is signed and verified; level 4 is probably legitimate; levels 2 and 1 require caution or blocking. The local AI analyzer checks scams, suspicious links, risky files and password requests without sending email text off the device.
billing@securestamp-signed.com
Level 5 is reserved for emails with a valid signed SecureStamp token.
news@samsung.com
Technical signals look good, but there is no signed stamp. Green with amber means probable, not certified.
billing@acme-corp-urgent.com
There are details worth reviewing before clicking, replying or paying.
noreply@microsoft-security.top
Possible brand impersonation, suspicious domain or strong fraud pattern.
Collect while you verify
Every verified email is also a collectible stamp.
Verified orgs have stamps with unique artwork designed by independent artists. When you verify an email, that stamp goes to your personal album. Limited editions are rarer.
Explore collections at SecureStamp.store →Pricing
Start free. Protect more when you need it.
Enterprise is loaded from the backend.