The trust layer for email

Know who's really behind every email.

Safemarker checks the identity signals behind each Microsoft 365 email and labels it Trusted, Caution or High Risk — before anyone acts on it.

See the product
  • Live in 10 minutes
  • ISO/IEC 27001
  • Hosted in the EU
Inbox · Microsoft 365Live check

Marta Keller · CFO

marta.keller@northbridge.example

Trusted

Re: Q3 board pack — final version

Attaching the final version for Thursday. Same deck as Monday, last comments in.

Trusted

Every check passed.

  • SenderConfirmed
  • DeviceKnown laptop
  • LocationAmsterdam
  • TimeUsual hours
  • WordingNormal
Try a message
Backed and supported byYES!DelftRabobank
The blind spot

A real mailbox can still send a fake request.

No dodgy link. No attachment. The right address, the right name, the right thread. Filters see nothing wrong — because nothing is wrong with the email.

A sneaky red monster hiding behind a smiling mask with an envelope under its arm“Hi, it's Sarah 👋”
Day 0

Step 1

An attacker gets into Sarah's mailbox

09:02

Step 2

They write to you as Sarah, in an existing thread

09:06

Step 3

Every inbox check passes. You reply.

With Safemarker, the 09:02 email is flagged.

New device, an hour Sarah never works, a request she never makes. The reader sees a High Risk label with all three reasons — before they touch the email.

Demo video

See it in action.

An email from someone you know, sent from their real address. Watch it pass every technical check, get flagged inside Outlook, and land in front of your security team.

Product

Two screens. Only one is in anyone's working day.

Your team keeps reading email as usual. The verdict is simply there.

Outlook with a High Risk label on the message and the Safemarker pane open beside it.

Built for the person about to act.

  1. 1

    The label comes first. One glance tells you how carefully to read.

  2. 2

    Reasons in plain words. “Asks for sensitive data” — not a rule ID.

  3. 3

    A clear next step. Matched to what's wrong, not a generic warning.

  4. 4

    On every device. The label lands on the message itself, seconds after arrival.

Threat coverage

What Safemarker catches.

Account activity, sender behaviour and email analysis — combined into one verdict.

Our focus

Business email compromise

Suspicious activity from legitimate accounts — the attack every other filter lets through.

  • Account takeover
  • Supplier compromise
  • Conversation hijacking

Sender impersonation

Lookalike domains and display names posing as people you know.

Payment fraud

Changed bank details, payment instructions and fake portals.

Credential phishing

Fake sign-in pages behind links or QR codes.

Calendar phishing

Malicious links and suspicious organisers in invites.

Why current controls miss it

Your filters check the email. We check the person.

SPF · DKIM · DMARC

Confirm the email came from servers allowed to send for that domain.

Doesn't confirm who is using the account

Spam & phishing filters

Look for bad links, attachments, reputation and known patterns.

Miss a compromised trusted account

Safemarker

Compares each email with what's normal for that sender — device, location, timing, behaviour — plus lookalikes, links, QR codes and invites.

Shows an identity verdict on the message

How it works

Plugs into Microsoft 365. Replaces nothing.

Not a secure email gateway. Safemarker connects through Microsoft's own API — nothing to reroute, nothing to rip out.

10 min

to set up the whole organisation

0

changes to how people work

No

gateway, MX change or rerouting

  1. 01

    Approve access

    An admin approves Safemarker in Microsoft 365.

  2. 02

    Roll out the add-in

    Deployed centrally to everyone — or a pilot group.

  3. 03

    First verdicts, same day

    Identity profiles build in under 5 minutes.

Between companies

Verify email across organisations.

When your suppliers and partners use Safemarker too, both sides can confirm who is really behind the email.

Your company

Verified

Supplier

Verified

Partner

Verified

European by default

We never store your email.

Privacy isn't a setting. It's how Safemarker is built.

ISO/IEC 27001 certified

Information security management

Hosted in the EU

A Dutch company. Email data is processed and stored in the EU.

Email content is never stored

We keep the verdict and its signals — never the body or attachments.

No AI decides the verdict

Your email content is never sent to an LLM.

ISO/IEC 27001 certified

Certified to the international information security standard.

Who it's for

One verdict. Two people who need it.

A happy envelope with a green fingerprint seal giving a thumbs up

Everyone with a mailbox

For the person reading the email

  • Nothing new to learn — the label is on the email they're already reading.
  • No squinting at lookalike addresses.
  • A clear next step, not a warning they've learned to ignore.
A red alarm light with a magnifying glass leaning against it

Whoever owns security

For the person responsible for security

  • Every detection explains why it fired.
  • A full record: who, what, when, where, and what we decided.
  • Quarantine, report or respond straight from the detection.
FAQ

Common questions.

Something else? hi@safemarker.com

Get started

Put a clear verdict on every email.

Start with a pilot group and see verdicts the same day. Turn it off any time — your mail keeps working as before.

hi@safemarker.com

Same-day replyEvery working day

On your own tenantAgainst real traffic

European UnionEU company, hosting and law