Know when someone registers a domain that looks like yours

You can't check them all manually

acme.com is yours. acme.net, acme.io, acme.co: any of these could be registered while you're not looking. Some will host a clone of your site. Others will sit on a parking page, ready to be sold back at a markup.

Brand monitoring tools exist, but most are priced for legal teams. Domain Sentinel gives you the same alerts, free.

How it works

1. 1

   Find the variants

   Search each domain you want to track. See who owns it, when it expires, and whether the nameservers changed recently.

2. 2

   Build your watchlist

   Add the extensions and misspellings that matter to your brand: .net, .io, .co, .org, and any common typos.

3. 3

   Get alerted on any change

   A new registration, a nameserver update, a transfer: any change to a watched domain triggers an email.

From the blog

• How to protect your brand with domain monitoringLearn how to get automatic alerts when someone registers a domain similar to your brand name. Daily RDAP monitoring explained.
• What is cybersquatting? Definition, examples and legal recourseCybersquatting is the bad-faith registration of a domain matching a brand name. Learn how it works, real cases, and how to fight back.
• How lookalike domain detection works: algorithms and methodsTechnical guide to detecting lookalike domains: Damerau-Levenshtein distance, homoglyph substitution, and structural pattern analysis with code examples.
• Defensive domain registration: a strategic guide for brandsRegistering domains you do not plan to use is a cost-effective brand protection strategy. Learn which TLDs and variants to cover, and where to stop.