You can build a prospect list for free from five sources: Google Maps, state business filings and license lookups, city permit records, trade association member lists, and the contacts you already have. Expect it to cost you time instead of money, roughly 3 to 5 minutes per prospect once you've got the hang of it.
Ruth owns a small sign shop. She wants more restaurant and contractor customers and has no budget for a data subscription. Here is how she'd build a list of 60 prospects over a weekend, and what she'd give up by not paying.
What free really costs you
Start with the honest math. If a prospect takes 4 minutes to research and record, 60 prospects takes 4 hours. If a paid tool would have returned those 60 in a few minutes, you've traded about four hours for the money you saved. That's a fine trade when you're starting out and your hours are cheap, and a poor one when each hour could go toward a paying job.
Free also tends to be less complete. You'll find the business and the phone number quickly. The owner's name and a working email take longer. Plan for it. The goal this weekend isn't a perfect database. It's 60 names you can send to on Monday.
A workable split of the four hours: 90 minutes on the map and permits for names, 90 minutes on owner names and emails, and 60 minutes cleaning the sheet and writing the first message. If you'd like more ideas for sources outside this list, build a list without buying one covers job postings, review sites and communities. Set a timer. Free research expands to fill whatever time you give it, and the 61st prospect is worth less than the first email you send.
Google Maps
Search a category plus a place: "restaurants Garland TX", "general contractors Plano". Zoom out to your service area and scroll the results. For each business, copy the name, address, phone, website and star rating into a sheet. Newer businesses with few reviews and a thin profile are often the ones about to need signs, menus and branding.
One caution. Google's terms don't allow automated scraping of Maps, and tools that do it can get your account or IP blocked. Doing it by hand, in the browser, one search at a time, is fine for a list this size. We cover the limits in how to get leads from Google Maps.
State business filings and license lookups
Every state keeps a public registry of businesses, usually on the Secretary of State website. Many let you search by name, city or filing date, and list the registered agent or an officer's name. That gives you a person's name at businesses where the website is a dead end. Professional and trade licensing boards (contractors, cosmetologists, dentists, electricians) publish searchable lookups too, with a licensee name and often a business address.
Ruth searches her state's contractor license board for active general contractors in three counties and finds 22 with a business name and an address. Combined with the map, she now has a name and a place for each. Rules about what you can do with this data vary by state, so read the site's terms, and use it to contact businesses about their business, not for anything personal.
Permits and new-business lists
Cities and counties publish building permits, certificates of occupancy and new business licenses, sometimes as a searchable portal and sometimes as a monthly PDF. For a sign shop, a new restaurant permit is as good as a warm lead: they need a sign before they can open. Look for "new business license", "building permits issued" or "certificate of occupancy" on the city website, sorted by recent date.
Ruth finds 14 new food service permits from the last 60 days. She adds them at the top of the sheet, because these businesses are buying right now. How to find new businesses in your area to sell to goes deeper on this source.
Trade association member lists
Restaurant associations, builders' associations, realtor boards, chambers of commerce and local business groups often publish a member directory: company, contact name, phone, sometimes an email. These lists are made to be read, and they come pre-sorted by industry. Some are public. Others need you to be a member, or are behind a login you can't use, and you shouldn't try to get around that.
Also check event pages. Exhibitor lists from last year's trade show tell you which businesses spend money on that category. A list of 80 exhibitors is a list of 80 companies that already buy something similar to what you sell. How to find B2B leads without paying for a database compares these sources by effort.
Your own customers and contacts
The cheapest source is the one you already own. Export your email contacts, your invoicing history, your phone's address book and your newsletter list. Sort out past customers, near-misses (people who asked for a quote and went quiet), and friends in the trade who know your buyer. Past customers can tell you who else they know. A single message to 30 old clients, "who do you know who's opening a place this year?", often turns up a few names faster than any search.
Find the person and the email
With the business list done, add the person. Check the website's About page, the license lookup, and the business's own social profile. For email, use the company's contact page and common patterns, then check any guess before sending. The steps are in how to find a business owner's email address. Free email checkers exist, and they work reasonably for obvious dead addresses. They're less reliable on domains that accept all mail.
Put everything in one sheet with these columns: business, contact name, email, phone, source, status. If you want a step-by-step version, how to build a lead list from scratch lays it out. Mark a status for every row so you don't contact the same person twice.
When paid data pays off
Free sources stop being efficient when you need names at volume, verified contact details, or a very specific filter (restaurants with 10 to 50 employees that opened in the last year, for example). That's the point to price a paid option, and to read lead data you can check before paying and enrichment credits explained plainly first, so you know what you're buying.
Here the Rocketship version is simple: describe the buyer in plain English, and its AI worker finds them by name with verified contact details, emails them from your own Gmail, follows up, and books the meeting. On Launch you get 50 leads a month and 100 enrichment credits, which cover about 20 fully verified contacts. Adding a person costs 1 credit, and a verified phone and email costs 5, charged only when found. Those are two separate allowances, so check which one a task draws on.
Use the free methods first. If they work, you've learned who your buyer is. If you hit the ceiling, you'll know exactly what to pay for. Rocketship finds the buyers, emails them from your own Gmail, follows up, and books the meeting on its own. Plans that get you customers start at $24.99 a month (Launch), and every monthly plan starts with a 7-day free trial, card required. Answering your existing number is included; a dedicated line is $5 a month.