We source targeted mailing lists, email lists, and telemarketing data across 600 categories so you don't have to. One request, one point of contact, thousands of data sources.
Describe who you need to reach — industry, demographics, geography, channel. Use our Audience Builder or just contact us.
We search 57,000+ data sources, pull counts, compare pricing, and send you our top recommendations.
Review record counts, pricing per thousand, available selects, and delivery timelines. No commitment.
We handle NCOA, CASS, deduplication, and formatting. You get one clean, campaign-ready file.
Sourcing data on your own means contacting dozens of list owners, comparing formats, and managing multiple vendors. We handle all of that — with best-in-class service at every step.
From audience strategy to data hygiene to platform-ready delivery — we handle the entire data supply chain so you can focus on results.
Access 57,093+ data products from hundreds of list owners through a single point of contact. No vendor juggling.
Every file is NCOA/CASS processed and suppression-scrubbed. We prioritize data quality so your campaigns reach real, deliverable addresses.
We merge, purge, deduplicate, and format your data across multiple list sources so you receive one clean, ready-to-use file.
Stop guessing with interest targeting. Learn how to upload real buyer data as Custom Audiences on Meta, build high-converting Lookalikes, and cut your cost per acquisition in half.
Read the full guide →How insurance agents and carriers use targeted mailing lists to generate leads for auto, home, life, and health insurance products.
Read more → GuideUnderstanding the role of a list broker in direct marketing โ what they do, how they're compensated, and why they save you time and money.
Read more → IndustryHow real estate professionals use mailing lists to reach homeowners, prospective buyers, investors, and property managers.
Read more →List.Solutions is a full-service data brokerage operated by Lead Harmonics LLC. We act as your single point of contact for sourcing targeted consumer, B2B, and healthcare mailing lists from hundreds of data owners and compilers. Instead of contacting list owners individually, negotiating rates, and managing multiple vendors, you work with one team that handles everything โ from list research and recommendations to data processing and delivery.
We source three main categories of marketing data: compiled lists (built from public records, surveys, directories, and business filings), response lists (individuals who have taken a specific action like purchasing a product, subscribing, or donating), and specialty lists (high-ticket buyers, hotline names, multi-buyers, and niche audience segments). Our team helps you determine which type best fits your campaign goals and budget.
Whether you need postal addresses for direct mail, verified email addresses for digital outreach, phone numbers for telemarketing, or matched records for programmatic advertising, we source and deliver data formatted for your channel. For multi-channel campaigns, we merge and deduplicate records across sources so your messaging stays coordinated and cost-efficient.
Browse the categories above to find your target audience, or simply tell us who you want to reach. We will research available lists, provide record counts and pricing, and recommend the best data sources for your campaign. For custom requests, multi-list orders, or ongoing data programs, call us at (407) 923-1715 or email benjamin@leadharmonics.com.
See exactly how many records match your audience — free, no commitment.