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// verified b2b email list

Sinatra Email List

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

verified contacts
12,783
companies
1,102
Syntax, MX and SMTP checked Catch-all detection Credit back for confirmed hard bounces

Sinatra Email List (sample 20)

Download the full list
Name and title Email
J

Janaina Braga

secretaria

PUC-Rio

ja***@puc-rio.br
E

Eric Arostegui

office coordinator

Imaginal Marketing Group

e***@imaginalmarketing.com
M

Michael Song

engineer

Glarysoft

mic***@glarysoft.com
D

Dorothy Leab

directing manager and senior health system strengthening expert

GaneshAID

d***@ganeshaid.com
A

Ashish Rajpal

Founder

XSEED Education

ash***@xseededucation.com
U

Udbhav Dwivedi

Software Engineer

Trangile Services

udb***@trangile.com
B

Bruce Ruggles

Senior Designer

Nott & Associates

b***@nottassociates.com
A

Ankit Agarwal

Founder

Housiey

ank***@housiey.com
D

Dave Larson

sales and marketing

Nisus Software

d***@nisus.com
A

Ali Mohammed

assistant professor

Arba Minch University

ali***@amu.edu.et
T

Tufail Hussain

fundraising and marketing manager

EBRAHIM COMMUNITY COLLEGE

t.h***@ebrahimcollege.org.uk
K

Kevin Freese

Chief Executive Officer

National Space Grant Foundation

fr***@spacegrant.org
S

Shwetansh Singh

Inside Sales Specialist

Propellum

shw***@propellum.com
V

Vernon P

Mechanics

Budget Brakes

ver***@budgetbrakes.com
M

Matthew S.

Chief Executive Officer

CNC Intelligence Inc

ma***@cncintel.com
G

Grace Ramirez

real estate advisor

Tropicasa Realty

g***@tropicasa.com
J

Jean Gregoire

Group President

Webb Wheel Products

jgr***@webbwheel.com
W

Woroud Madwar

Founder & CEO, Stars Tech Group

Stars Tech Group

wo***@starstechgroup.com
S

Sarah Dawson

freelance editor owner

SAN DIEGO PROFESSIONAL EDITORS NETWORK

s***@sdpen.com
D

David Zinger

Senior Product Manager

Kavi Global

dav***@kaviglobal.com

Showing 20 of 12,783 verified contacts

Refine to your ICP

Narrow these 12,783 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%)
Founder
2 (10%)
Chief Executive Officer
1 (5%)
secretaria
1 (5%)
office coordinator
1 (5%)
engineer

// live data

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