What does the internet know about an email?
Enter an address to scan it against known data breaches and map its public footprint – the same exposure attackers use for phishing, credential stuffing and account takeover.
twitter, adobe, tumblr, crevado, coroflot, firefox, anydo, plurk, devrant, flickr, rambler, seoclerks, eventbrite, naturabuy
Every leaked login is a way in.
Breach data doesn't stay buried. It gets traded, combined and weaponised against the people in it.
What breach exposure means
When a site is breached, its email-and-password lists circulate for years. If an address appears in many breaches, attackers can map a person's accounts, reused passwords and habits – long before they ever touch your site.
How attackers weaponise it
Leaked credentials feed credential-stuffing bots that try millions of email/password pairs against logins, plus targeted phishing that quotes real details to look legitimate. Most account takeover starts with data that already leaked elsewhere.
How TrustSig stops the fraud
TrustSig scores every signup, login and form submission in real time and blocks the automated abuse this exposure enables – invisibly, with no CAPTCHA for your real users, and without storing a profile of them.
Fraud intelligence, explained.
The scan checks an address against large public breach corpora and known leak datasets, then maps the public footprint associated with it. It surfaces only data that already exists in the open.
Checking exposure for an address you own or are authorised to assess is standard security hygiene. Don't use it to target people you have no relationship with – the tool exists to show risk, not to enable it.
The scan runs to return your result and is not used to build a marketing profile. For your own accounts, treat any hit as a prompt to rotate reused passwords and turn on a second factor.
Exposure like this is the raw material for account takeover and bot abuse. TrustSig blocks that abuse at the edge in real time – invisibly for real users – so leaked credentials can't be turned into fraud on your site.
Invisible bot protection, built in the EU.
These tools show how exposed people already are. TrustSig is the fix: it verifies real users and stops bots with zero challenges, zero cookies, and no fingerprint profile of your visitors. Every feature is free to start.
Already in production
Publishing platforms, fintech and national charities across Europe already run TrustSig on their forms.
PublitPrint-on-demand and digital book distribution for publishers.Publishing · Sweden
LEI SystemOfficial Legal Entity Identifier registration agent.Fintech · Estonia
Disability Sport WalesNational charity for inclusive and disability sport.Charity · Wales
