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// verified b2b email list

K2 Email List

Access a verified email list of companies that use K2, with accurate contact data for sales prospecting, integrations, and competitive displacement.

verified contacts
35,208
companies
1,897
Syntax, MX and SMTP checked Catch-all detection Credit back for confirmed hard bounces

K2 Email List (sample 20)

Download the full list
Name and title Email
I

Ihor Shevkoplias

Head of Content Marketing

SendPulse

i.s***@sendpulse.com
A

Aaron Luan

Frontend Developer

LiteSpeed Technologies

a***@litespeedtech.com
C

Carmen Gaona

profesora ciencias de la comunicación

Universidad Rey Juan Carlos (URJC)

car***@urjc.es
J

Juceli Bengert

Pesquisadora

Fundação Joaquim Nabuco

juc***@fundaj.gov.br
A

Allen Freese

Translator

Tzu Chi Foundation

af***@tzuchi.org
A

Arvind Chauhan

coo

JoomlArt

ar***@joomlart.com
F

Fudo Fuad

editor in chief

Fudzilla

f***@fudzilla.com
I

Ioannis Tampakoudis

Assistant Professor

University of Macedonia

tam***@uom.gr
P

Pxr Rayo

pagina web

pasion por el rayo

p***@pasionporelrayo.com
Å

Å�eljka Å�eljka knežević

senior research associate

Ruđer Bošković Institute

z***@irb.hr
E

Evan Pricco

editor in chief

Juxtapoz Magazine

e***@juxtapoz.com
M

Marcio Vieira

chief executive officer and cientista de dados

Ambiente Livre

vie***@ambientelivre.com.br
B

Bob Roth

us business development manager

Sparx Systems

bo***@sparxsystems.com
B

Beth Svinarich

sales and marketing manager

University Press of Colorado

b***@upcolorado.com
E

Eric Harry

President

Calm Radio

e***@calmradio.com
M

Marisol Ojeda

secretaria

Universidad de Los Lagos

mo***@ulagos.cl
I

Idoia Corti

Content Manager

Caloryfrio.com

ido***@caloryfrio.com
C

Craig Cassen

police sergeant

Rapid City

cra***@rcgov.org
R

Renzo Prati

chief financial officer

Italgraniti Group

r.***@italgranitigroup.com
N

Nafisa Shamsher

director of option line

Heartbeat International

nsh***@heartbeatinternational.org

Showing 20 of 35,208 verified contacts

Refine to your ICP

Narrow these 35,208 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%)
editor in chief
1 (5%)
Head of Content Marketing
1 (5%)
Frontend Developer
1 (5%)
profesora ciencias de la comunicación
1 (5%)
Pesquisadora

// live data

How the K2 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 K2 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 K2 list
const { data } = await reveal.companiesSearch({
  query: "companies using K2",
  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 K2, pull their key contacts with domain_search, verify every email including catch-all domains, add direct-dial numbers with phone_finder, then export the K2 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 K2 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