Generate likely variations
Check missing, added, replaced, reordered, hyphenated, keyboard-adjacent, and visually similar character patterns across relevant domain endings.
Lookalike domain monitoring
Find and monitor domains that look like yours.
SecurityAlert generates likely variations of your domain, checks their DNS and certificate records, and shows which ones deserve a closer look.
No credit card · One brand monitor · Daily scans on the free plan
Example results
Example only
yourbr4nd.testVisual character replacement
Addressable
your-brand-mail.testBrand plus a service term
Mail enabled
login-yourbrand.testBrand plus a login term
Certificate observed
The .test names are reserved examples. Evidence labels describe observations, not a malicious verdict.
Typosquatting detection
Check which lookalikes have active infrastructure.
A similar name can be suspicious, defensive, coincidental, or inactive. SecurityAlert combines name similarity with public technical signals so your queue begins with facts rather than assumptions.
Check DNS and certificate records
Look for address records, mail routing, nameserver delegation, recent certificate observations, and positive matches in self-collected zone data.
Review the evidence
Use each signal as investigation context. A name match alone is never presented as proof that an operator is impersonating your brand.
How monitoring works
How SecurityAlert checks each candidate.
Add your company domain
Start with the canonical company domain. SecurityAlert uses the brand name and domain structure to build lookalike candidates.
Watch for new lookalikes
Recurring scans evaluate generated variants while daily zone comparisons look for newly observed domains that resemble the brand.
Add DNS and registration details
DNS, MX, nameserver, certificate, registrar, IP, and page evidence are attached when the relevant source returns them.
Review before taking action
Prioritize the strongest evidence. On plans with takedown preparation, an authorized person must approve anything filed externally.
What the results do and do not mean
A missing DNS response does not mean a domain is available.
DNS can be empty, delayed, blocked, or intentionally dormant. A domain may also be registered without hosting a site or receiving mail. That is why SecurityAlert reports no evidence observed instead of calling a candidate unregistered, available, or safe.
Likewise, positive evidence does not prove abuse. Mail routing, a certificate, or a web address makes a candidate more useful to investigate, but the final assessment still depends on content, ownership, infrastructure, timing, and brand context.
One-time check or daily monitoring
Run a one-time check or start daily monitoring.
Free lookalike checker
Run a bounded, point-in-time evidence check without creating an account.
- Samples up to 18 generated variants
- Checks address, mail, delegation, recent certificate, and zone evidence
- Uses evidence labels without making an impersonation verdict
Ongoing brand monitoring
Create an account when you want recurring scans, finding history, and alerts for one or more brands.
- One brand monitor with daily scans on the free plan
- Recurring domain and public-evidence checks
- Paid tiers add scale, investigation, and governed takedown workflows
Frequently asked questions
Questions about lookalike monitoring.
What is a lookalike domain?
A lookalike domain resembles a brand domain through a missing, added, replaced, reordered, or visually similar character. Some are malicious, while others are unrelated or defensive registrations. Similarity is a lead to investigate, not proof of abuse.
Does the free checker prove that a domain is registered or available?
No. The checker reports positive public evidence it can observe for a bounded sample of variants. A result with no observed DNS, nameserver, certificate, or zone evidence is unknown. It does not mean the domain is available, unregistered, or safe.
What evidence does SecurityAlert check?
The free checker can evaluate address records, mail exchange records, nameserver delegation, recent Certificate Transparency observations, and positive matches in SecurityAlert's self-collected zone data. Ongoing monitoring adds finding history and recurring checks.
How often does ongoing lookalike monitoring run?
The free plan includes one brand monitor with daily scans. SecurityAlert also compares newly observed zone data and processes Certificate Transparency evidence on separate collection schedules. Exact observation time depends on when public sources publish and resolve the evidence.
Can SecurityAlert take down an impersonation domain?
Business plans can prepare evidence and draft abuse reports for the appropriate provider. Nothing is filed until an authorized person reviews and approves it.
Check your domain for lookalikes.
Start with the public checker. If the results matter to your brand, carry the same domain into a free monitor after signup.