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// verified b2b email list

ClustrMaps Widget Email List

Target decision-makers at companies with ClustrMaps Widget in their stack using deliverable, verified B2B emails for precise technographic outbound campaigns.

verified contacts
43,803
companies
2,112
Syntax, MX and SMTP checked Catch-all detection Credit back for confirmed hard bounces

ClustrMaps Widget Email List (sample 20)

Download the full list
Name and title Email
E

Edgar Cardoze

founder

Ning

edg***@ning.com
I

Irina Cherepanova

project manager

uCoz support

i***@ucoz.ru
J

Joshua Skov

Industry Mentor and Instructor

University of Oregon

j***@uoregon.edu
M

Mark Ford

Applications Engineer Technical Sales & Service

SiteMercado

m***@site123.me
N

Nick Mango

Co-Owner and Head of Product

Limited Run

n***@limitedrun.com
B

Brian False

cto

PBworks

bri***@pbworks.com
A

Abhishek Singh

I am a Composting Artist currently working

KOOP360

abh***@lnk.bio
I

Iacopo Rovelli

member the organising team

United Kingdom Explosion Liaison Group (UKELG)

ir***@ic.ac.uk
M

Mariusz Nowosielski

cto datacenter

Kylos Data Center

i***@kylos.pl
C

Catherine Wareham

administrative assistant

Swarthmore College

cw***@swarthmore.edu
Å

Å��支伟 Zhiwei

lecture

Nankai University

pe***@nankai.edu.cn
Z

Zaiton Yusof

assistant science off

University of Malaya

za***@um.edu.my
M

Miles Grunavld

teaching assistant

Elon University

mgr***@elon.edu
S

Steven Shiau

researcher

National Center for High-performance Computing

st***@nchc.org.tw
A

Alain Adde

director facilities materials

Ecole Polytechnique

web***@polytechnique.fr
M

Marcellin Marcellin petitfrère

chanteur

2U

mar***@u2.com
G

Gary Usher

sales manager

Metal Blade

g***@metalblade.com
B

Badiaa Dellal

maà tre de recherche

Cerist

bd***@cerist.dz
A

Ahmad Ridho

lecturer

UIN Syarif Hidayatullah Jakarta

ahm***@uinjkt.ac.id
M

Marie-laure Mugnier

University Professor

LIRMM

mar***@lirmm.fr

Showing 20 of 43,803 verified contacts

Refine to your ICP

Narrow these 43,803 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.

// live data

How the ClustrMaps Widget 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 ClustrMaps Widget 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 ClustrMaps Widget list
const { data } = await reveal.companiesSearch({
  query: "companies using ClustrMaps Widget",
  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 ClustrMaps Widget, pull their key contacts with domain_search, verify every email including catch-all domains, add direct-dial numbers with phone_finder, then export the ClustrMaps Widget 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 ClustrMaps Widget 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