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Company lists · Data refreshed September 2026

Top 11 Internet marketing agencies based in Leesburg, United States

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 25 companies tracked

RevenueBase identified 25 internet marketing agencies headquartered in Leesburg, United States as of September 2026 and tracks 321 professional contacts across them, including 60 with verified work emails. New York is the largest hub.

This list covers internet marketing agencies headquartered in Leesburg, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review
25Companies
321Contacts tracked
60Verified emails
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The 11 largest internet marketing agencies based in Leesburg, United States

Ranked by team size
Top 11 of 25 internet marketing agencies based in Leesburg, United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names internet marketing agencies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
That CompanyStrong evidence
Leesburg, FL, United StatesHQ checked Sep 4, 2026n/a186

“That Company is a White Label internet marketing firm with over 15 years of experience and a strong customer service core.”

Source: company website · checked Sep 4, 2026
2
Silverback StrategiesPartial evidence
Leesburg, VA, United StatesHQ checked Sep 4, 202611-5042

“Silverback Strategies is a performance marketing agency for growth-focused teams who need to move fast and prove impact.”

Source: company website · checked Sep 4, 2026
3
Logico InfotechIndirect evidence
Leesburg, VA, United StatesHQ checked Sep 4, 202611-5014

“Welcome to Logico Info Tech, a leading force in the realm of IT Services and Consulting.”

Source: company website · checked Sep 4, 2026
4
Paramount Communication GroupPartial evidence
Leesburg, VA, United StatesHQ checked Sep 4, 202611-509

“Since 2005, Paramount Communication Group has helped publishers, associations, and non-profit organizations use email marketing, social media, and digital strategies to connect…”

Source: company website · checked Sep 4, 2026
5
Local SEOIndirect evidence
Leesburg, United StatesHQ checked Sep 4, 20261-109

“Local SEO is one of the leading SEO experts in Northern Virginia and Washington DC.”

Source: company website · checked Sep 4, 2026
6
Sprolo Marketing ConsultantsPartial evidence
Leesburg, VA, United StatesHQ checked Sep 4, 20261-108

“We're a tru-boutique (*Troo-Booteek) marketing firm built to deliver a perfect mix of social media, Google Ads, SEO, email, texts, postcards, billboards, video, and whatever else…”

Source: company website · checked Sep 4, 2026
7
Conveyance Marketing GroupIndirect evidence
Leesburg, VA, United StatesHQ checked Sep 4, 202611-507

“We are a team of bright, innovative and talented veteran marketers dedicated to big ideas, fresh insights and measurable results.”

Source: company website · checked Sep 4, 2026
8
Marketspark Digital MarketingIndirect evidence
Leesburg, VA, United StatesHQ checked Sep 4, 20261-102

“Committed to helping small businesses increase revenue and profits-affordably.”

Source: company website · checked Sep 4, 2026
9
Design Synergy StudioIndirect evidence
Leesburg, FL, United StatesHQ checked Sep 4, 20261-101

“Be the successful entrepreneur you were meant to be.”

Source: company website · checked Sep 4, 2026
10
Twisted JackalIndirect evidence
Leesburg, FL, United StatesHQ checked Sep 4, 20261-101

“Twisted Jackal is part web design, part social media management, part app developer, and part liz.err, totally human!”

Source: company website · checked Sep 4, 2026
11
Clapping DOG MediaIndirect evidence
Leesburg, VA, United StatesHQ checked Sep 4, 20261-101

“At Clapping Dog Media, we help businesses grow and better connect with their audience through Search Engine Optimization (SEO).”

Source: company website · checked Sep 4, 2026

Showing 11 of 25 internet marketing agencies based in Leesburg, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 60 reachable decision-makers.

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Internet marketing agencies based in Leesburg, United States at a glance

As of Sep 4, 2026
1-10Median size (employees)
New YorkLargest hub · 1618 HQs
Contacts with mobile numbers
Sep 4, 2026Data refreshed

Companies by employee count

1-10
16
11-50
9

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Leesburg, over 25 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among internet marketing agencies, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Leesburg, United States whose own description of what they do matches “internet marketing agencies”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among internet marketing agencies, and records with no verified work email. Companies headquartered outside Leesburg are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 60 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 4, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Internet marketing agencies by metro in the United States

Frequently asked

How many internet marketing agencies are there based in Leesburg, United States?

RevenueBase identified 25 internet marketing agencies headquartered in Leesburg, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

That Company, headquartered in Leesburg, tops this list with the largest team on record.

Which city has the most internet marketing agencies?

New York leads with 1618 headquartered companies, followed by Los Angeles (1192) and Miami (918).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 60 verified decision-maker contacts tracked across these 25 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 4, 2026.

Ready to reach these companies? Verified emails and direct dials for all 25 internet marketing agencies based in Leesburg, United States. Start with a free account, no credit card.

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Related lists

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.

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