Prospecting & Contact Data
How to Find Companies That Match Your ICP
To find companies that match your ICP, turn each ICP criterion into a searchable filter, run those filters across a few sources, check a sample of the results by hand and tighten the filters before you scale. The first pass is almost always too broad, so treat it as a draft list, not a finished one.
Practical guide · Published September 20, 2026 · Written by Jeffrey Huis in 't Veld
Start with filters, not names
An ICP describes the kind of company worth mailing. Before you search, translate it into criteria you can actually filter on, such as industry, location, size and business model. If you need help with that step, see how to choose the right company filters. For the full process from ICP to finished list, start with how to turn an ICP into a prospect list.
Where to look for matching companies
No single source covers everything, so most lists combine a few. Company databases let you search on filters directly. Industry directories and association member lists are useful for niche markets. Your own CRM and closed-won accounts show what real customers look like and can seed a lookalike search. Direct web research fills gaps for very specific segments. If you would rather not build the list yourself, Yotru can build a target account list from a defined ICP.
Sample the results before you scale
Pull a random sample of about twenty companies and mark each one as a clear fit, a maybe or a miss. If more than a few are misses, the filters are too loose. Look at what the misses have in common, then add or tighten a filter to remove them. Repeat with a fresh sample until the misses are rare. This takes an hour and can save a great deal of wasted postage.
Learn from your best customers
Your strongest existing customers are the best guide to a good list. Look at what they share: industry, size, region, how they buy. Search for companies with the same traits, and give extra weight to traits that appear in nearly all of them. Be careful with traits that only look common because of how you happened to find those customers.
Common traps
Watch for companies that are no longer operating, subsidiaries listed alongside their parent, the same company under two spellings and industry categories broad enough to pull in businesses that are nothing like your customers. Each of these inflates a list without adding a real prospect.
How big should the list be?
Aim for a qualified list that supports a proper run. As a rule of thumb, that means the low thousands rather than a few hundred. If the qualified pool is smaller than that, run it as a smaller, higher-touch tier instead of stretching the criteria.
Frequently asked questions
About twenty is enough to spot patterns. If several are clear misses, tighten the filters and sample again before you build out the full list.
Yes, using industry directories, association member lists, your CRM and direct web research. Paid databases are faster to filter, but the ICP logic matters more than the source.
Yes. If there is no list to supply, or the existing one is too thin, Yotru can build a target account list from a defined ICP.
Related topics
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Yotru can build a target account list from a defined ideal customer profile, or check a list you already have before anything is printed.
