BlogB2B Database9 Best Mortgage Broker Email Database Providers [2026 Review]
9 Best Mortgage Broker Email Database Providers [2026 Review]

B2B Database

9 Best Mortgage Broker Email Database Providers [2026 Review]

Anil SalviAnil SalviUpdated: Jun 18, 202624 min read13 reads

If you sell to mortgage brokers, the quality of your email database directly impacts your outreach results.

Mortgage brokers work with borrowers, lenders, real estate partners, and financial companies.

So, having their correct and up-to-date contact details is important.

But not every provider offers reliable data. 

Some lists may include outdated contacts, generic company email addresses, missing phone numbers, or emails that were never properly verified.

That is why I reviewed 9 mortgage broker email database providers based on data accuracy, verification process, targeting options, compliance support, and fit for outbound campaigns.

Let’s get started.

Best Mortgage Broker Email Database Providers – TOC

TL;DR: Best Mortgage Broker Email Database Providers (Ranked & Tested)

If you only have 60 seconds, here is what you need to know:

  1. Saleshandy Lead Finder → Best for fintech companies, mortgage software providers, real estate firms, and agencies that need verified mortgage broker emails with real-time filtering and built-in outreach from one platform.
  2. Blue Mail Media → Best for marketing teams that need a ready-made mortgage broker CSV with email, phone, and postal data across 5 countries.
  3. DataMasters → Best for teams who need a pre-built US mortgage broker contact list with emails, phone numbers, and postal addresses in one file.

Here is the full comparison of all 9 providers:

# Provider Database Size Verification Mortgage Filtering Starting Price
1 Saleshandy 852M+ contacts, 42M+ companies Real-time, multi-source Industry + title + geo + company size + signals $49/mo Lead Finder
2 Blue Mail Media 48K+ mortgage contacts Batch (claimed 90%) Pre-segmented Quote-based
3 DataMasters 28,365 contacts Batch Pre-segmented by SIC From $800
4 Scrap.io 158K+ US contacts Real-time scrape Google Maps categories Under $50
5 CampaignLake Not disclosed Claimed 97% Pre-segmented Quote-based
6 UpLead 160M+ Real-time SMTP SIC/NAICS + title $99/mo
7 LakeB2B 300M+ contacts, 243+ countries Quarterly SMTP Pre-segmented Quote-based
8 Data Axle USA (Now Salesgenie) 17.3M business Batch SIC code Custom
9 Apollo.io 210M+ contacts Yes (paid plans) Industry + title Free tier; $49/mo paid

How I Evaluated These Mortgage Broker Email Database Providers

Before reviewing any provider, I established five key criteria. These are the factors that matter most when investing in mortgage broker contact data.

1. Is the Data Fresh and Verified?

An email list is only valuable if it delivers accurate mortgage broker contacts.

I evaluated how each provider verifies its data and how often it updates records. 

Some platforms verify emails in real time when you export them, while others rely on periodic checks that can quickly become outdated.

2. Can You Easily Find Mortgage Brokers?

A large database means little if you cannot identify the right prospects. 

I looked at the available filtering options, including job title, location, company size, revenue, and licensing information. 

The more precise the filters, the easier it is to build targeted prospect lists.

3. Is the Data Sourced Responsibly?

Data quality goes beyond accuracy. 

We assessed whether providers comply with regulations such as CAN-SPAM, CCPA, GDPR, and CASL. 

Transparent sourcing practices and clear compliance policies were essential factors in our evaluation.

4. Does It Fit Into Your Existing Workflow?

I checked whether contact data can be easily exported to popular CRMs and sales tools through formats like CSV or XLS. 

Providers offering integrations, data enrichment, and ongoing record updates received higher scores.

5. Does the Pricing Deliver Real Value?

Pricing models vary widely. Some providers charge thousands of dollars for a one-time database, while others use subscription-based plans with recurring credits. 

Rather than focusing on the upfront cost, we evaluated the cost per verified contact and the overall return on investment.

9 Best Mortgage Broker Email Database Providers

Here is a closer look at each provider, what they offer, where they fall short, and who they work best for.

1. Saleshandy 

Best for: Financial institutions, real estate firms, fintech companies, mortgage software providers, and agencies that connect with verified mortgage brokers for targeted outreach and partnership opportunities.

Saleshandy helps you build a targeted mortgage broker email list using verified contact data and advanced filters.

You can find mortgage brokers, loan officers, branch managers, lending directors, and other professionals based on job title, industry, company size, revenue, technology used, and location.

The database includes 852M+ contacts and 42M+ company profiles across the US, EMEA, APAC, and other major markets. 

So whether you want to reach mortgage brokers in Texas or lending professionals in the UK and Australia, you can narrow your search and build a more relevant prospect list.

How to find mortgage broker emails with “buying signals” using Saleshandy (3 steps)

Intent data helps you find mortgage brokers who are already researching tools or services like yours, whether that is lead generation, CRM software, loan processing tools, compliance support, or borrower communication solutions.

Instead of emailing every mortgage broker in a state, you can focus on the ones already showing interest in solving a relevant business problem. This makes your outreach more timely, useful, and likely to get a response.

Step 1: Log in to Saleshandy, open Lead Finder, and set the Industry to “Loan Broker” or “Real Estate Agent.” Pick your target location to narrow down the right professionals in the right market.

Broker SH finding step1

Step 2: Filter by buying signals like recent job changes, company hiring activity, or headcount growth. This removes contacts who are unlikely to respond and keeps only mortgage brokers who are actively making buying decisions right now.

broker finding step 2

Step 3: Review the results and download mortgage broker emails to CSV for your CRM or push them directly into a Saleshandy email campaign with one click. 

Key Features:

  • 852M+ verified contacts across 42M+ companies with 75+ targeting filters
  • Real-time verification from multiple data sources before you pay
  • Buying signal filters (job changes, hiring activity, headcount growth)
  • Built-in email campaigns and follow-ups from the same platform
  • Export to CSV or push directly to Outreach with one click

Pricing:

Plan Annual Price
Lead Finder Starter $49/mo
Lead Finder Pro $79/mo

2. Blue Mail Media 

Best for: Marketing teams that want a ready-made mortgage broker CSV for email campaigns and direct mail.

Blue Mail Media is a traditional B2B data vendor that sells pre-built contact lists by industry and profession.

Their mortgage broker database includes 48K+ claimed contacts with business emails, direct phone numbers, postal addresses, and SIC codes.

I looked at their mortgage broker list as a benchmark for the static list vendor model. Data is delivered in CSV, TXT, and XLS formats for easy CRM integration.

blue mail media

If you need a loan officer email list alongside mortgage broker data, Blue Mail Media covers both. The multi-country coverage is a genuine advantage if you need mortgage contacts outside the US.

But there are two clear limitations for targeted prospecting.

First, there’s no way to search or filter the data yourself. You request a quote, wait for a response, and only then see the list. So, you’re essentially buying before you evaluate.

And since the data is pre-built and not real-time, even with 90% accuracy, you’ll still run into stale or bounced contacts, with no way to verify individual emails before downloading.

Key Features:

  • 48K+ mortgage broker contacts with email, phone, and postal data
  • Multi-country coverage (US, UK, Canada, Australia, India)
  • CSV and XLS export formats for CRM upload
  • SIC code segmentation for industry-level targeting

Pricing: 

Quote-based. No published pricing on the website.

What to Know Before Choosing Blue Mail Media:

  • It provides pre-built email lists rather than custom audience building.
  • Contact information may become outdated over time after purchase.
  • Limited filtering options compared to self-serve data platforms.
  • Pricing is available only through a custom sales quote.

3. DataMasters 

Best for: Teams that need a pre-built US mortgage broker contact list with emails, phone numbers, and postal addresses in one file.

DataMasters provides a highly targeted contact list of 28,365 mortgage brokers and loan officers across the United States. 

Their database includes verified email addresses, postal details, and phone numbers, making it a solid option for mortgage broker lead generation, promoting financial products, or expanding your network within the mortgage industry.

You can request custom targeting by geography, including state, county, city, and ZIP code radius. 

The data also includes professional licensing details and SIC code segmentation (6163 for Loan Brokers), which helps if you are running compliance-focused or industry-specific campaigns.

DataMasters cross-references its records from multiple sources and follows CAN-SPAM and GDPR guidelines. 

For a US-only mortgage broker list with postal addresses included, the data quality is competitive among traditional vendors.

But the database is fixed at 28,365 contacts. If your campaigns need large volumes, multiple rounds of outreach, or quarterly refreshes, you will exhaust this database quickly. 

And since every list is pre-built by the vendor, there is no way to log in, set your own filters, and pull fresh contacts when you need them again.

Key Features:

  • 28,365 US mortgage brokers and loan officers
  • Full postal, phone, and email contact details per record
  • SIC code segmentation with geographic customization
  • Cross-referenced from multiple data sources

Pricing: 

Quote-based.

What to Know Before Choosing DataMasters:

  • Data is batch-verified, so accuracy depends on the last update cycle.
  • Lists are pre-built and cannot be filtered or customized by users.
  • Contacts do not refresh after download; updated data requires a new purchase.
  • The database is fixed at 28K contacts, which may be limited for large-scale campaigns.

4. Scrap.io 

Best for: Small teams or freelancers who need mortgage lender contact details for local outreach without paying for a full B2B database subscription.

Scrap.io takes a different approach compared to traditional database providers. Instead of relying on a static contact list, it pulls mortgage lender data directly from Google Maps and company websites in real time.

You get access to 158,197 US mortgage lender contacts, including business name, email, phone number, address, website URL, Google rating, and review count.

The big advantage here is freshness. When a business updates its Google Maps listing, the data updates too. And at under $50 for full access, plus 100 free leads on trial, the pricing is hard to ignore.

But it comes with some structural limits.

Most emails pulled from Google Maps are generic inboxes like info@ or contact@, not direct emails for specific mortgage brokers or loan officers. 

So if you’re trying to reach a named decision-maker, this won’t get you there.

There’s also no role-based filtering. You don’t get job titles, seniority, or decision-maker targeting. It’s business-level data, not person-level data.

It works well for volume and local business coverage. But if your focus is precise outreach to specific mortgage brokers, the targeting depth is limited.

Key Features:

  • 158K+ US mortgage lender contacts from Google Maps
  • Real-time data refresh when businesses update listings
  • Business name, email, phone, address, Google rating, and reviews
  • Low price point with free trial included

Pricing: 

Under $50 for full database access. 100 free leads on trial.

What to Know Before Choosing Scrap.io:

  • Business-level data only. No individual job title, seniority, or role filtering.
  • Emails are often generic (info@ or contact@), not direct personal addresses.
  • Many mortgage brokers do not maintain Google Maps business listings.
  • Best for high-volume local outreach, not targeted professional prospecting.

5. CampaignLake

Best for: Teams that want a vendor-built mortgage broker email list with NMLS licensing details delivered as a ready-to-use file.

CampaignLake is a well-known industry-specific B2B database provider with 200M+ contact profiles and 75M+ company profiles across industries.

Its mortgage brokers email list includes verified US contacts with details like email, phone, company name, job title, location, NMLS data, and industry information. The data is delivered in CSV or Excel format, which makes CRM imports easy.

The buying process is fully manual. You submit a request form with targeting details like SIC or NAICS codes, geography, and campaign goals. 

The team reviews it, shares available counts and pricing, and then builds your list. You can also request a free sample before paying to check data quality. Delivery time depends on how complex the request is.

That is where it starts to feel familiar. There is no search filter available to explore database contacts or verify emails before making a purchase.

So you define what you need, wait for the team to assemble it, and then work with what is delivered.

Key Features:

  • Mortgage broker email, phone, and postal data
  • Claims GDPR-compliant data sourcing
  • Claims 97% accuracy
  • Quote-based custom lists

Pricing: 

Quote-based. No self-serve access.

What to Know Before Choosing CampaignLake:

  • Very new vendor with limited online presence and no verifiable track record.
  • Database size is not disclosed publicly.
  • No third-party reviews found on G2, Trustpilot, or Capterra.
  • Request a sample list and verify the data yourself before committing.

6. UpLead 

Best for: Teams that need real-time verified mortgage broker emails backed by an accuracy guarantee, buyer intent data, and precise SIC/NAICS code filtering.

UpLead gives access to 160M+ B2B contacts with a stated 95% email accuracy rate. That accuracy is really the core of its positioning. Every email is verified in real time before you export it.

You can filter by SIC code, like 6163 for mortgage brokers, NAICS code 522310, job titles, and geography. It also connects directly with Salesforce, HubSpot, and Outreach, so data flows into your CRM without extra steps.

UpLead also works well for building a loan officer email list using the same SIC/NAICS filtering, which is a genuine advantage. 

The honest part is that the database is noticeably smaller compared to platforms like Saleshandy (160M vs. 852M+). 

That gap becomes more obvious when you are targeting niche roles across multiple regions.

Pricing also reflects its focus on accuracy. The Essentials plan starts at $99/month for 170 credits, which comes to roughly $0.58 per contact. 

As your list grows, those credits get used up quickly. Even the $199/month plan only includes 400 credits.

Overall, UpLead works well when accuracy is the main priority. But if you need both volume and coverage, the cost starts to compound over time.

Key Features:

  • 160M+ B2B contacts with 95% accuracy guarantee
  • Real-time email verification before export
  • Industry classification filters to target mortgage brokers using SIC and NAICS codes
  • CRM integrations with Salesforce, HubSpot, and Outreach

Pricing: 

Plan Price
Free Trial $0 for 7 days
Essentials $99/mo
Plus $199/mo

What to Know Before Choosing UpLead:

  • Smaller database compared to more comprehensive providers.
  • Pricing can get expensive for high-volume mortgage broker prospecting campaigns.
  • Credits deplete fast for teams building large mortgage broker lists.

Bonus read: Want more options? See our tested list of the best UpLead alternatives for better value.

7. LakeB2B 

Best for: Enterprise teams running large-scale global campaigns to mortgage professionals across multiple markets.

LakeB2B is an enterprise-oriented data vendor with 300M+ verified contacts across 343M+ business sites in 243+ countries. 

Each contact includes 100+ structured data fields, and the platform runs quarterly SMTP checks for email validation. They claim full GDPR, CCPA, and CAN-SPAM compliance across their database.

Where LakeB2B stands out is global coverage. 

If you are targeting mortgage brokers across the US, UK, Canada, Australia, and even regions like the Middle East, it is one of the few providers that consolidates all of that into a single database.

That said, access is not self-serve. Everything runs on a quote-based model, so you cannot directly explore the database or test data quality upfront. 

Email validation also happens in cycles, which means some records may sit between verification windows.

In practice, LakeB2B fits best for enterprise teams that prioritize global reach and structured data over hands-on control and real-time list building.

Key Features:

  • Mortgage broker coverage across 160+ countries
  • 100+ data fields per contact
  • Quarterly SMTP email validation
  • Enterprise-scale list building with custom segmentation

Pricing: 

Quote-based. Enterprise-oriented.

What to Know Before Choosing LakeB2B:

  • No self-serve filtering or trial access before buying.
  • Quote-only pricing with no published rates.  
  • You are buying a pre-built list, not building your own.
  • Quarterly validation means data can still be weeks old between checks.

8. Data Axle USA (Now Salesgenie)

Best for: Small to mid-size businesses that want a self-serve list builder with built-in campaign tools to reach mortgage brokers through email, direct mail, and display ads from one platform.

Salesgenie, formerly Data Axle USA and InfoUSA, has been in the data business since 1972. 

That is over 45 years of building and maintaining business and consumer databases across the United States and Canada.

What sets it apart from most providers on this list is how the data is verified. Salesgenie employs 300+ full-time researchers who phone-verify records, and an independent audit of 100,000+ records delivered a 95% confidence rating on data accuracy.

To find mortgage brokers, you use the self-serve list builder. Select the SIC code for Mortgage Brokers or Mortgage Bankers, then narrow by location (state, county, city, ZIP code, or radius), company size, revenue, employee count, and job title like Owner, President, or Branch Manager. 

You see live record counts as you apply each filter, so you know exactly how large your list will be before exporting.

The platform also includes built-in tools for email campaigns, direct mail, and online display ads. That means you can build your mortgage broker list and run campaigns from the same platform without switching to a separate outreach tool.

Where it feels limited is the depth of targeting. You will not find advanced signals like technographics, funding activity, or buying intent.

If you need to target a specific loan officer by seniority or find brokers actively evaluating new tools, Salesgenie does not offer that level of detail.

Key Features:

  • 45+ years of data expertise with 300+ researchers phone-verifying records
  • Self-serve list builder with live record counts before you download
  • Filter by SIC code, geography, company size, revenue, and job title
  • Built-in email, direct mail, and display ad campaign tools in one platform
  • US and Canadian business and consumer data
  • 95% confidence rating from independent data audit

Pricing: 

Custom, mid-range. Free trial available.

What to Know Before Choosing Data Axle (Salesgenie):

  • Built for broad business and consumer marketing, not deep B2B sales prospecting.
  • No advanced filters like technographics, funding rounds, or buying intent signals.
  • Email data leans toward general business contacts, not specific loan officers or branch managers.
  • As of January 2026, DataAxleUSA.com has moved to Salesgenie.com (same team, same data, new URL).
  • Coverage is US and Canada only, no mortgage broker data outside North America.

9. Apollo.io

Best for: Teams that want a free tier to start building mortgage broker lists before committing to a paid plan.

Apollo.io is one of the most popular B2B sales platforms on the market. It combines a contact database with built-in email campaigns, a CRM, and a Chrome extension for LinkedIn prospecting.

The database covers 210M+ contacts. You can filter by job title, industry, company size, location, revenue, and tech stack to find mortgage broker contacts. 

Real-time email verification is available on paid plans. The free tier gives you 75 credits per month to test the platform.

I looked at Apollo for mortgage broker list building specifically. The filtering works well for basic title and industry searches. The Chrome extension also makes it easy to pull individual mortgage broker contacts from LinkedIn.

But two things limit it from building mortgage lender email lists at scale.

The free plan is useful for testing the platform, but 75 credits per month won’t get you very far. 

If you’re building a larger mortgage broker list, you’ll likely need a paid plan. Pricing starts at $59 per user per month, which can become expensive as your team grows.

Apollo works well if you are validating workflows or testing targeting filters. 

But for large-scale mortgage broker list building where verification depth and cost efficiency matter, it becomes less effective compared to multi-source, verification-first platforms like Saleshandy.

Bonus read: Check out our in-depth list of the best Apollo.io alternatives to see how it compares.

Key Features:

  • 230M+ Verified contacts with industry, title, company size, and revenue filters
  • Built-in email campaigns, CRM, and Chrome extension
  • Free tier with 75 credits per month
  • Real-time email verification on paid plans

Pricing:

Plan Annual Price
Free $0
Basic $59/user/mo
Professional $99/user/mo

What to Know Before Choosing Apollo.io:

  • Single enrichment source. No multi-source verification like Saleshandy.
  • Phone number data is weaker than email data.
  • Database is significantly smaller than Saleshandy (230M vs. 852M+).
  • Per-user pricing ($59/user/mo+) adds up quickly for teams of three or more.
  • Free tier (75 credits/mo) runs out fast for serious list building.

Bonus read: Comparing providers across industries? Our B2B database guide covers the full landscape.

What You Get in a Mortgage Broker Email Database

Whether you are using a mortgage company email list or individual broker contacts, the data quality directly impacts your outreach results.

You need enough information to personalize outreach, reach the right decision-makers, and filter out irrelevant brokers.

A well-structured mortgage broker email database includes 100+ data fields. This lets you segment by role, location, mortgage type, company size, and more without relying on multiple tools or manual data stitching.

Here is what a good mortgage broker email database should include:

Data Field Why It Matters Example
Officer Name Personalize outreach, skip generic messaging James Richardson
Email Address Direct channel for reaching the right person j.richardson@apexlending.com
Phone Number Follow-ups and direct contact (702) 555-0183
Company Name Research the brokerage before reaching out Apex Lending Group
Website Verify the business, tailor your pitch apexlending.com
Mailing Address Direct mail and compliance 4200 W Sahara Ave, Suite 110
State, ZIP, Country Geo-targeted campaigns Nevada, 89102, US
Business Listing URL Check online presence and reviews Google Maps listing
Mortgage Type Match your offer to their lending focus Residential, Commercial, FHA
SIC Code Industry-level segmentation 6159 — Mortgage Bankers
Employee Size Prioritize by brokerage scale 10 to 50 employees

Sample Mortgage Broker Email List

Here is what a verified mortgage broker email list looks like in practice: 

Here is what usually happens. You pull names from one source, emails from another, verify phone numbers somewhere else, and manually cross-check company details. By the time the list is ready, you have spent hours and still are not sure whether half the data is accurate.

Bonus read: Been down this road before? Read our guide on buying email lists to avoid the most common mistakes.

That is exactly why tools like Saleshandy exist. Instead of juggling multiple sources, you search once and get verified emails, phone numbers, company details, mortgage-type filters, and 75+ additional data points all ready to use.

3 Data Compliance Rules to Keep in Mind While Building a Mortgage Broker Email List

Before you start reaching out to mortgage brokers, it is important to understand the basic email compliance rules.

Building and using a mortgage broker mailing list for B2B outreach is completely legal. But different regions have different regulations around how you collect and use contact data.

Here are the major compliance laws you should know about:

1. CAN-SPAM (United States)

If you email mortgage brokers in the US, your emails must include:

  • Your real name and company information
  • A valid physical mailing address
  • A clear unsubscribe option
  • Non-misleading subject lines

Violating CAN-SPAM regulations can lead to significant penalties per email sent.

2. GDPR (UK and European Union)

If you are contacting mortgage brokers in the UK or EU, you typically need:

  • Legitimate business interest or consent
  • A clear opt-out mechanism
  • Transparent communication about who you are and why you are contacting them

You must also honor unsubscribe requests promptly.

3. CASL (Canada)

Canada’s Anti-Spam Legislation (CASL) is stricter than CAN-SPAM.

Under CASL, you generally need:

  • Implied or express consent
  • Proof of consent records
  • Clear unsubscribe functionality

This is especially important if you are running campaigns targeting Canadian mortgage brokers or loan officers.

Start Building Your Mortgage Broker Email Database

Alright, that’s all 9 mortgage broker email database providers covered.

So the real question is, which one should you actually go with?

Honestly, it depends on what you’re looking for. If you just need a basic list for a one-time campaign, some of the providers above will do the job. 

But when you want to build your own verified mortgage broker email list and start outreach from one platform, Saleshandy Lead Finder is the strongest option.

With 852M+ contacts and 75+ filters, you can go from broad targeting to a highly focused mortgage broker list in minutes. 

There is no waiting for list builds and no exporting data just to figure out if it still works.

You can start with 50 free credits, build a sample mortgage broker email list, and test it against your target market before scaling.

Start your free trial and find your first verified mortgage broker contacts today!

Frequently Asked Questions

1. What Is a Mortgage Broker Email Database?

A mortgage broker email database is a B2B contact list containing verified email addresses, phone numbers, and company details of licensed mortgage brokers, loan officers, and lending professionals. It is also commonly searched as a loan officer email list or a mortgage lender email list. SaaS companies, wholesale lenders, insurance reps, title companies, and marketing agencies use these databases for sales outreach, partnership development, and targeted campaigns.

2. How Much Does a Mortgage Broker Email List Cost?

If you want to buy a mortgage broker email list, pre-built options from data vendors typically cost $200 to $2,000+ for a one-time CSV download. Self-serve B2B databases work differently. Saleshandy starts at $25/mo for email campaigns plus $49/mo for Lead Finder with up to 2,500 verified contacts per month. You pay per verified contact, not for a fixed list that decays over time.

3. Where Can I Find Mortgage Broker Email Addresses?

You can find mortgage broker emails through B2B database platforms like Saleshandy Lead Finder (852M+ contacts with 75+ filters), Apollo.io (free tier available), or UpLead (95% accuracy guarantee). These platforms also work for building a mortgage lender email list or loan officer email list using the same filters. Traditional vendors like Blue Mail Media and DataMasters sell pre-built lists. The key difference is whether the data is verified in real time or batch-verified once and sold as a static file.

4. How Do I Verify a Mortgage Broker Email List?

If you build your list with Saleshandy Lead Finder, verification happens automatically. Each email is checked across multiple data sources before you see it, and you only pay for verified results. For purchased lists, run them through a dedicated email verification tool before sending. Target under 2% bounce rate.

5. What SIC Code Is Used for Mortgage Brokers?

Mortgage brokers are classified under SIC code 6163 (Loan Brokers) and NAICS code 522310 (Mortgage and Nonmortgage Loan Brokers). You can use these codes when filtering B2B databases by SIC code to target mortgage professionals specifically.

6. Can I Get a Free Mortgage Broker Email List?

Saleshandy offers 50 free credits on signup, which is enough to find and verify up to 50 mortgage broker email addresses. Apollo.io also offers a limited free tier. Large-scale verified mortgage broker mailing lists with no cost do not exist without significant data quality tradeoffs.