Free tool
Find companies like your best customers, free
Enter the websites of up to three of your best customers. FoxKnock reads each site, describes what your customers sell and to whom, searches for companies that match, ranks them by how close each one is to your nearest customer, and explains the best 10 at most: what each one shares with your customers and how it differs. Every company links to the page where we found it.
How it works
- 1
Reads your customers' websites
FoxKnock opens each homepage and reads what the company says it does. A site that will not open counts by its name only, and the result tells you so.
- 2
Describes, then searches
Claude writes two to four short descriptions of what your customers sell and to whom, without their names, and a company search looks for businesses that match. The result shows the descriptions it used.
- 3
Ranks by closeness
Each company found is compared with each of your customers, and the closest one sets its score. The result says whether it compared the meaning of the pages or the words they share.
- 4
Explains and checks the best matches
Claude writes short notes on what each company shares with your customers and how it differs, using only the text we found, and drops pages that are not a company's own site, such as directories and profiles of your customers.
What it does not do
- It reads public websites only. It does not check company size, location, revenue or funding, so filter the list yourself.
- Search results can include agencies, directories or companies that only write about your market. Open each link before you contact anyone.
- It does not know your CRM or your segment, so it cannot leave out companies you already work with.
- Each visitor gets 3 searches a day, and all visitors share a daily limit, because every search costs us real search and AI fees.
What happens to what you type
- The websites you enter are sent to the search, page-reading and AI providers FoxKnock uses, because that is how the search runs. We do not save them or the results in our database. Pages and search results stay in server memory for up to 15 minutes so a repeat search is faster, then they are gone.
- To enforce the daily limit we count searches under a keyed hash of your IP address that changes every day, and delete those counts after three days. A Cloudflare Turnstile check runs before each search to keep bots out; most people never see it.
Frequently asked questions
How does the free lookalike finder choose companies?
It reads your customers' homepages, has Claude describe what they sell and to whom without naming them, and searches for companies that match those descriptions. Every company found is ranked by how close it is to your nearest customer, pages about your customers themselves are dropped, and up to 10 of the best get a note on what they share and how they differ.
Is it really free?
Yes. There is no sign-up and no card. Each visitor gets 3 searches a day, and there is a shared daily limit for all visitors because every search costs us real search and AI fees. When a limit is reached the tool says so, and it resets at midnight UTC.
What is a lookalike company?
A company that resembles your best customers in what it sells, who it sells to and how it does business. Lookalikes are a common starting point for outbound, because a company like your best customers is more likely to need what you sell. Read how to find similar companies for the methods and their trade-offs.
What does the FoxKnock app do differently?
In the app a lookalike search can start from up to 10 customers, use lost customers to push similar companies down, leave out your customers, competitors and companies you rejected, and score each match against your segment's criteria. Then you can research each company with cited sources and draft emails you approve. See lookalike companies.
Do you store the websites I enter?
No. The websites and the result list are not saved in our database. They are sent to our search, page-reading and AI providers so the search can run, and cached in server memory for up to 15 minutes. We keep only a daily count of searches under a keyed hash of your IP address, deleted after three days.
See what FoxKnock finds for you
Start with 500 free credits. No card, no call, and every email waits for your approval by default.