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// verified b2b email list

Cornerstone Email List

Access a verified email list of companies that use Cornerstone, with accurate contact data for sales prospecting, integrations, and competitive displacement.

verified contacts
386,050
companies
15,356
Syntax, MX and SMTP checked Catch-all detection Credit back for confirmed hard bounces

Cornerstone Email List (sample 20)

Download the full list
Name and title Email
C

Christine Fleming

area vice president

Verizon

chr***@verizon.com
R

Rhiannen Pou

Experienced marketing professional with a passion for all things digital

AccuWeather

rhi***@accuweather.com
L

Lori Smith

children's mental health specialist

State of Utah

lo***@utah.gov
A

Amber Gibson

senior project coordinator

Vonage

amb***@vonage.com
T

Tim Mather

ceo

Untappd

t***@untappd.com
J

John Fountain

assistant inside sales associate

TurboSquid

jfo***@turbosquid.com
T

Toby Pyper

Regional Director - South

Tarmac

tob***@tarmac.com
P

Pam Straw

Resort Manager

Ocean Canyon Properties

pam***@oceancanyon.com
H

Hannala Farrell

Service Contract Inside Sales Representative

ZOLL Medical Corporation

hf***@zoll.com
M

Mary Warfield

Data Manager

Fresenius Kabi Austria

mar***@fresenius-kabi.com
M

Margot Hamel

Editor Nursing

Bohn Stafleu from Loghum

mar***@bsl.nl
L

Lindsey Exposito

Strategic Partnerships

UpSellit

lex***@upsellit.com
J

Jorge Fajardo

Program Coordinator

Oxfam

jf***@oxfam.org.uk
B

Brig Konecke

Purchasing and Inventory Manager

Card Kingdom

b***@cardkingdom.com
J

Jesper Faurby

co-founder

Filecamp

je***@filecamp.com
W

William Kish

ceo

TotalChoice Hosting

b***@totalchoicehosting.com
C

Chhanda Bose

Res Associate Professor

Texas Tech University Health Sciences Center

chh***@ttuhsc.edu
T

Tommy Sellers

manager application development

Love's Travel Stops & Country Stores

tom***@loves.com
B

Britney Duggan

guest insight analyst manager

Marco's Pizza

bd***@marcos.com
R

Rollin Tebbetts

Airport Operations Manager

Bradley International Airport

rte***@bradleyairport.com

Showing 20 of 386,050 verified contacts

Refine to your ICP

Narrow these 386,050 contacts down to the ones that match your ideal customer profile.

Revenue range Headcount Tech stack Funding stage Hiring signals Buyer intent Job title Location Founded year
Build my target list for free

No credit card required.

Job title distribution

2 (10%)
ceo
1 (5%)
area vice president
1 (5%)
Experienced marketing professional with a passion for all things digital
1 (5%)
children's mental health specialist
1 (5%)
senior project coordinator

// live data

How the Cornerstone email list is built with Tomba

This isn’t a static file that quietly rots. Every list is assembled live from the Tomba API and verified before it reaches you: current, deliverable and ready to export in minutes.

  1. 01

    Target

    Pick your filters: industry, technology, job title, department, company size, country or US state. Tomba Reveal maps the companies that match.

  2. 02

    Discover

    Domain Search pulls the current decision-makers and their work emails from each matching company, live rather than from a recycled dump.

  3. 03

    Verify

    Every address is SMTP-checked and AI-scored the moment it is found, including catch-all (accept-all) domains most tools skip.

  4. 04

    Export

    Download fresh, verified contacts to CSV or your CRM, or pull them straight from the REST API. Built the moment you ask, so nothing is stale.

Why build this list with Tomba

AI-powered discovery

Machine-learning models rank and match the right people at the right companies, then predict the most likely deliverable pattern.

Catch-all verification

Tomba verifies catch-all (accept-all) domains that other providers mark “unknown”, so you can reach leads they cannot validate.

Verified before you send

Syntax, MX and SMTP checks plus catch-all detection keep bounces low, and every confirmed hard bounce earns a credit back.

Sources you can check

Every address comes from public web pages Tomba crawls, and the sources behind any email are one request away.

Pay only for results

If Tomba can’t find an email, the search is free: only searches that return a result use a credit.

API, SDKs & MCP

A REST API with 13 official SDKs, spreadsheet add-ons, and an MCP server to build this list straight into your AI tools and workflows.

// for developers and ai assistants

Build the Cornerstone list with the Tomba API

Reveal the companies, Domain Search their live contacts, Verify every email (catch-all included), and Phone Finder for direct dials. Copy-paste in Go, JavaScript, cURL, or MCP.

// npm install tomba
import { TombaClient, Reveal, Domain, Verifier, Phone } from "tomba";

const client = new TombaClient();
client.setKey("ta_xxxx").setSecret("ts_xxxx");

const reveal = new Reveal(client);
const domain = new Domain(client);
const verifier = new Verifier(client);
const phone = new Phone(client);

// 1. Reveal: find companies for the Cornerstone list
const { data } = await reveal.companiesSearch({
  query: "companies using Cornerstone",
  page: 1,
});

for (const company of data.companies) {
  // 2. Domain Search: pull live contacts + emails
  const res = await domain.domainSearch({
    domain: company.website_url,
    limit: "20",
  });

  for (const contact of res.data.emails) {
    // 3. Verifier: AI + catch-all verification (accept-all included)
    const check = await verifier.emailVerifier(contact.email);
    if (check.data.email.status !== "valid") continue;

    // 4. Phone Finder: add a direct-dial number (5 credits)
    const dial = await phone.finder({ email: contact.email });
    console.log(contact.email, contact.position, dial.data?.intl_format);
  }
}

With the MCP server connected, ask your AI assistant:

“Use Tomba to find companies using Cornerstone, pull their key contacts with domain_search, verify every email including catch-all domains, add direct-dial numbers with phone_finder, then export the Cornerstone email list.”

Works in Claude, Cursor, Windsurf and any MCP client. The companies_search, domain_search, email_verifier and phone_finder tools run live. See the remote MCP docs.

Every address comes back with its verification status, catch-all domains included. See the Reveal, Domain Search and Verifier docs for full options.

// pricing

What does the Cornerstone email list cost?

No per-list fees and no lock-in: you pay for the searches that return addresses, from $8.98 per 1,000 search credits.

$8.98/ 1,000 search credits

On Pro Plus (50,000 a month). An Email Finder search that returns an address uses 1 credit; Domain Search uses 1 per 10 results.

Includedverification status

Every address a search returns comes with its verification status, catch-all domains flagged, on the same search credit.

$0for empty searches

If Tomba finds no valid address, the search is free. The same search again in the same usage window is free too.

Start free: 25 search credits every 30 days, no card required.

Plans from 2,500 to 350,000 search credits a month, or one-time packs valid for 12 months. The REST API, 13 SDKs and the MCP server come with every plan.

// faq

Frequently asked questions

Still have questions? Visit the help center