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Company lists · Data refreshed September 2026

Top 25 Online advertising agencies based in Denver, United States

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 330 companies tracked

RevenueBase identified 330 online advertising agencies headquartered in Denver, United States as of September 2026 and tracks 1,816 professional contacts across them, including 575 with verified work emails. New York is the largest hub.

This list covers online advertising agencies headquartered in Denver, 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 5, 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 5, 2026 86% judged on-target in blind review
330Companies
1,816Contacts tracked
575Verified emails
Unlock all 330 companies Free signup · no credit card · 500 free credits

The 25 largest online advertising agencies based in Denver, United States

Ranked by team size
Top 25 of 330 online advertising agencies based in Denver, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names online advertising 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
AdtaxiIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202651-200143

“Adtaxi is a client-centric digital organization that brings scale, precision, and sophistication to digital marketing.”

Source: company website · checked Sep 5, 2026
2
Booyah AdvertisingIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202651-20095

“You're spending a lot on digital ads.”

Source: company website · checked Sep 5, 2026
3
Voice Media GroupIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 2026501-1,00093

“Voice Media Group is a full-service media and marketing company based in Denver, Colorado.”

Source: company website · checked Sep 5, 2026
4
Location3Indirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202651-20087

“We help multi-location brands turn complexity into clarity so every location can perform and the system can scale.”

Source: company website · checked Sep 5, 2026
5
FruitionIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5055

“At Fruition, we don’t just follow the digital marketing trends-we set them.”

Source: company website · checked Sep 5, 2026
6
Native RankIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202651-20042

“At Native Rank, we are dedicated to transforming the digital landscape for businesses of all sizes and industries.”

Source: company website · checked Sep 5, 2026
7
EaccountableIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5034

“eAccountable is a full service, digital marketing agency based out of Denver Colorado.”

Source: company website · checked Sep 5, 2026
8
51blocksIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5033

“51Blocks offers small businesses and website owners unique solutions with a local friendly service.”

Source: company website · checked Sep 5, 2026
9
Clicks And ClientsPartial evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5033

“Clicks and Clients is a results-driven Digital Marketing Agency- specializing in pay-per-click, search engine optimization, social advertising and multi-variable testing.”

Source: company website · checked Sep 5, 2026
10
jemsu.comPartial evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5025

“Digital Advertising + Short Video Marketing”

Source: company website · checked Sep 5, 2026
11
Volume NineIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5023

“At Volume Nine, we’ve built a different kind of digital marketing agency.”

Source: company website · checked Sep 5, 2026
12
Real FIG Advertising MarketingPartial evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5020

“Real FiG Advertising + Marketing is a full-service marketing agency for established small to mid-sized businesses looking to grow through inbound lead generation and brand…”

Source: company website · checked Sep 5, 2026
13
Peaks Digital MarketingIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 20261-1020

“Peaks Digital Marketing helps small and medium sized businesses rank number one on Google using SEO, Omni-channel marketing and Adwords (PPC).”

Source: company website · checked Sep 5, 2026
14
The Xcite GroupIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5020

“Digital marketing is both an art and a science, and it's always evolving.”

Source: company website · checked Sep 5, 2026
15
Numana SEOIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 20261-1019

“Numana SEO is a digital marketing company that specializes in effective, data-driven strategies that get results.”

Source: company website · checked Sep 5, 2026
16
Boulder SEO MarketingIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202651-20019
Source: company website · checked Sep 5, 2026
17
RED EGG MarketingIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5016

“Red Egg Marketing is based around the belief that a business can use affordable yet highly effective techniques to run a successful marketing campaign and maintain a strong…”

Source: company website · checked Sep 5, 2026
18
Revel InteractiveIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5014

“Revel Interactive is a digital marketing agency focused on the strategy and execution of performance-driven, multi-channel digital marketing programs.”

Source: company website · checked Sep 5, 2026
19
Session InteractiveIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5014

“Session Interactive is a results-based digital marketing agency obsessed with data measurement and analysis.”

Source: company website · checked Sep 5, 2026
20
BlenndIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5013

“Blennd is a web design and digital marketing agency in Denver, Colorado.”

Source: company website · checked Sep 5, 2026
21
Global Social Media MarketingIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 20261-1012

“GSMM helps you engage your target audiences regionally, nationally, or internationally to achieve your business goals or education results.”

Source: company website · checked Sep 5, 2026
22
VEA TechnologiesIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5011

“We offer comprehensive digital solutions with tailored strategies for your business growth.”

Source: company website · checked Sep 5, 2026
23
Carbon8Partial evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5011

“Carbon8 is an interactive advertising agency located in the Lower Highlands neighborhood of Denver, Colorado.”

Source: company website · checked Sep 5, 2026
24
Kinetic319Partial evidence
Denver, CO, United StatesHQ checked Sep 5, 202611-5010

“Kinetic319 distinguishes itself in the advertising realm through a unique blend of creativity, strategy, and comprehensive expertise.”

Source: company website · checked Sep 5, 2026
25
StaphausIndirect evidence
Denver, CO, United StatesHQ checked Sep 5, 20261-1010

“STAPHAUS [stop-house] is a full-service digital marketing agency that specializes in the furniture and design industry, as well as B2B marketing.”

Source: company website · checked Sep 5, 2026

Showing 25 of 330 online advertising agencies based in Denver, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 575 reachable decision-makers.

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Online advertising agencies based in Denver, United States at a glance

As of Sep 5, 2026
1-10Median size (employees)
New YorkLargest hub · 1111 HQs
Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
242
11-50
73
51-200
12
501-1,000
1

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 Denver, over 330 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 online advertising 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 Denver, United States whose own description of what they do matches “online advertising 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 online advertising agencies, and records with no verified work email. Companies headquartered outside Denver 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, 575 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 5, 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.

Online advertising agencies by metro in the United States

Frequently asked

How many online advertising agencies are there based in Denver, United States?

RevenueBase identified 330 online advertising agencies headquartered in Denver, 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?

Adtaxi, headquartered in Denver, tops this list with the largest team on record.

Which city has the most online advertising agencies?

New York leads with 1111 headquartered companies, followed by Los Angeles (769) and Miami (613).

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 575 verified decision-maker contacts tracked across these 330 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 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 330 online advertising agencies based in Denver, United States. Start with a free account, no credit card.

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Related lists

Browse: Companies home · Online advertising agencies in United States · All United States lists · All Online advertising agencies lists · New lists

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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