The team wants to hit “launch” on an email campaign, and you’re the one with the bad news:

Not enough leads.

Email appending programs can be your salvation, but they’re not all alike. Seeking to match up your current email list with a future direct mail program? That will be a different tool than the one reaching out to people who have contacted you on social media.

There are lots of ways to build a list – the following tools may match your strategy to build yours.


Lead411 is a sales intelligence and email appending platform. The SaaS-based solution is user-friendly, affordable and powerful, providing pipeline-building company details for businesses in any industry. Create or append business email lists, find or verify company addresses, look up executive email and phone numbers so you reach the right person, and more. User-friendly UI for quick company and people searching delivers profile pages packed with data.
BEST FEATURES: Pack your pipeline by building unlimited lists of prospects using over 15 different types of criteria.
PRICING: Packages start at $75 monthly, with a limit of 100 exports.


US Data Corporation provides marketing teams with access to over 270 million opt-in email addresses worldwide with over 300 selects. The data is compiled and updated regularly from a variety of public records, as well as independently-owned databases of users who have opted-in to offers, filled out club memberships or other response-oriented mechanism.
BEST FEATURES: Continuously updated, accurate, opted-in database of individuals or businesses. Highly granular lists based on marketing needs.
PRICING: See vendor for details.


Experian’s Consumer Data Technology includes a suite of specialized email and mailing lists that advertisers and agencies can use to identify and target specific households, individuals and businesses. In addition, Experian features a number of marketing tools and services such as data appending, designed to provide businesses with a deeper understanding of consumer characteristics using demographic information and Mosaic USA household lifestyle segmentation. Its business list has 14 million; its consumer is 210 million and 110 million households. One of its features is Email Campaign Builder, a tool for creating and sending an email newsletter and tracking its success with Excel or PDF metrics reports.
BEST FEATURES: Market and Customer Profile Reports include key characteristics of target market and market size based on number of households in geographical areas.
PRICING: See vendor for details.


Reach Marketing offers a range of B2B and B2C prospecting lists that include mailing addresses, phone numbers and emails. The Featured Lists include subscribers to trade publications and specialty magazines, organization members, executives in key positions at companies across all industries, from small companies to large corporations.
BEST FEATURES: A variety of rentable prospecting lists that include subscribers to trade publications and specialty magazines, organization members, executives in key positions at companies across all industries, from small companies to large corporations.
PRICING: See vendor for details.


AccuData Email Append and Verification Services is a suite of email marketing tools designed to ensure that email list data is performing at its best. AccuData identifies email addresses and confirms customer desire to receive email communications with an opt-in permission email while identifying problematic and undeliverable email addresses. It also optimizes email marketing file for multi-channel campaigns with the addition of contact names and postal addresses matched to existing email addresses.
BEST FEATURES: Re-engages customers that have become inactive and/or unresponsive, contacting them at an alternative and verified email address.
PRICING: See vendor for details.


TowerData Email Append matches email addresses to a direct mail list to accelerate email marketing or take advantage of Facebook’s custom audiences or Twitter’s tailored audiences. TowerData Email Append attaches business and consumer email addresses to postal records, enabling organizations to keep in touch with direct mail subscribers and boosting the size of the email list. Use to enable multi-channel marketing, improve customer service and retention.
BEST FEATURES: Use for both email list and direct mail list building.
PRICING: The following is B2C pricing. 1 to 50K contacts is $.20 per match. 50K to 250K contacts is $.15 per match. 250K to 500K contacts is $.12 per match. 500K to 999K contacts is $.10 per match. Above one million contacts requires a custom quote. For B2B pricing, contact TowerData.


ReachForce is a subscription-based data list cleanse and append solution that validates emails, de-dupes, corrects, and verifies company data and updates a batch list data up to four times annually. Validates emails, de-dupes, corrects, and verifies company data.
BEST FEATURES: Updates your batch list data every quarter.
PRICING: ReachForce Data Cleanse and Append Pricing starts at $1,250 per month.

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