CypherSeal — Invoice Fraud Detection for Gmail

Stop invoice fraud before you pay it. CypherSeal checks the emails you open in Gmail for the patterns behind business email compromise (BEC) - spoofed senders, changed bank details, fake urgency - and email analysis runs locally in your browser. FREE: automatic scanning as you read, unlimited manual scans, the full detection engine, first-time sender alerts, and contact memory. PRO: $19/month or $190/year (2 months free). 14-day trial included, no card required. 30-day money-back guarantee. THE MOMENT THIS MATTERS A vendor you have paid for two years sends a new invoice. Same name, same signature, same tone. One line is different: the bank account. Nothing in Gmail tells you it changed - the message arrives clean, passes every filter, and looks exactly like the last eleven. That is business email compromise, and it does not look like a scam. It looks like Tuesday. CypherSeal reads the email at the moment you do and flags what your inbox cannot: that this sender's payment details are not the ones you paid last time. WHAT CYPHERSEAL CATCHES Payment and invoice fraud - Vendor bank detail changes - ACH, wire, IBAN, or account numbers that differ from what this sender used before - Fake and altered invoices, and invoice numbers that break a sender's pattern - Payment diversion and remittance redirection requests - First-contact payment requests from senders you have never dealt with - Supplier and vendor payment fraud aimed at accounts payable Sender and identity tricks - Look-alike and cousin domains - the "rn" that reads as "m", the extra hyphen, the .co instead of .com - Display-name spoofing - the right name in front of the wrong address - Reply-to mismatches, where your reply quietly goes somewhere else - Executive impersonation and CEO fraud, including requests routed to a personal address - Freemail addresses standing in where a company address should be Pressure and phishing patterns - Artificial urgency, deadline pressure, and secrecy cues ("keep this between us") - Phishing links, redirects, and look-alike link domains - Requests for credentials or confidential data - Short, vague messages asking for a financial action HOW IT WORKS CypherSeal runs at the point of reading. Open an email in Gmail and it checks the sender, the domain, the links, the language, and any payment details, then shows a plain-English verdict with the evidence behind it. It also remembers. CypherSeal builds a private contact memory of who actually emails you and which payment details they have used before, so it can tell you when something changes - the change no spam filter is looking for. WHO IT IS FOR Bookkeepers, accountants, and accounts-payable staff. Fractional CFOs and controllers. Small business owners who approve their own payments. Solo professionals and freelancers who invoice and get invoiced. Anyone whose job includes the sentence "I'll send the payment today." PRIVACY Email analysis runs locally in your browser. Your email content never leaves your device. No account is required to start, and there is nothing to configure. - Usage counts stay on your device - no third-party analytics, advertising, or telemetry - CypherSeal does NOT request gmail.readonly - it cannot read your inbox through any server API - The only data sent off-device is your Google account email, used solely to verify Pro status - Uninstall removes everything WHAT'S FREE - Automatic scanning as you read - Unlimited manual scans - The full detection engine - clear verdicts and the evidence behind them - First-time sender (UNVERIFIED) alerts - Contact memory that learns who really emails you WHAT PRO ADDS - $19/month or $190/year (2 months free) Built for the person who approves the payments: - Safe View - critical emails stay blurred until you review the warnings - Audit export - one-click CSV or printable record for your accountant, bank, insurer, or lawyer - Invoice Registry timeline - the payment-detail history behind every vendor - Copy Report - a printable PDF record of any single scan - Weekly Safety Report - what was checked, and what was flagged 14-day free trial included, no card required. 30-day money-back guarantee. WHY IT MATTERS The FBI's Internet Crime Complaint Center recorded $3.05 billion in reported business email compromise losses across 24,768 complaints in 2025 - an average reported loss of about $123,000 per complaint (ic3.gov). Most of it starts with one convincing email on an ordinary morning, and it is the kind of loss that is very hard to reverse once the payment has left. WHAT CYPHERSEAL IS NOT It is a fraud detection aid, not a guarantee, and it is not a replacement for your own verification. It reads patterns; it does not verify a sender's identity. No detection tool catches everything, and a clean verdict is not permission to pay. Always confirm payment changes through a channel you already trust - a phone number you have on file, not one from the email in front of you. COMMON QUESTIONS Does it read my email? It analyses the email you have open, in your browser. Email content, scan results, and findings stay on your device. Does it work with Google Workspace? Yes. Personal Gmail and Google Workspace accounts both work, with no admin setup. Does it work outside Gmail? Not yet. CypherSeal is built for Gmail in Chrome. Do I need an account? Not to start. The free features work immediately after install. Signing in with Google is only needed for a Pro subscription. Will it flag my normal invoices? It is tuned to stay quiet on routine mail - recognised providers, recurring bills, and senders you already have a history with. Verdicts explain what was checked, not only what was found. What happens when my trial ends? Automatic scanning and the full detection engine stay free. The Pro features listed above pause until you subscribe. SUPPORT Questions, problems, or refunds: euli@cypherxtech.com Privacy Policy: https://cypherxtech.com/legal/privacy Terms of Service:…