Company lists · Data refreshed September 2026

Top 25 Full service B2B marketing agencies based in Seattle, United States

Name: Full service B2B marketing agencies based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 363 companies tracked

RevenueBase identified 363 full service B2B marketing agencies headquartered in Seattle, United States as of September 2026 and tracks 2,404 professional contacts across them, including 710 with verified work emails. New York is the largest hub.

This list covers full service B2B marketing agencies headquartered in Seattle, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 24, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 24, 2026 86% judged on-target in blind review

363Companies

2,404Contacts tracked

710Verified emails

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The 25 largest full service B2B marketing agencies based in Seattle, United States

Ranked by team size

Top 25 of 363 full service B2B marketing agencies based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to full service B2B marketing agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	NEW Engen	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	201-500	302 contacts →
	Partial evidence “New Engen is a digital marketing agency driving impact for brands across every phase of the customer journey – maximizing it, measuring it, and repeating it.” Source: RevenueBase Database · checked Sep 24, 2026
2	JI Design & Marketing	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	n/a	167 contacts →
	Partial evidence “JI Design & Marketing is a creative studio specializing in branding, web design, and digital strategy, helping businesses build a cohesive presence and grow with intention.” Source: RevenueBase Database · checked Sep 24, 2026
3	Salesmrkt	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	51-200	94 contacts →
	Indirect evidence “Welcome to Salesmrkt, powered by Salesbox.io!” Source: RevenueBase Database · checked Sep 24, 2026
4	Kalungi	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	51-200	73 contacts →
	Strong evidence “A complete and instant marketing team for early-stage B2B SaaS companies.” Source: RevenueBase Database · checked Sep 24, 2026
5	Crown Social Agency	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	62 contacts →
	Partial evidence “CROWN is an independent, award-winning, full-service, social-first ad agency based in Seattle, WA.” Source: RevenueBase Database · checked Sep 24, 2026
6	2a Consulting	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	51-200	50 contacts →
	Partial evidence “2A is a one-stop-shop marketing agency focused on the tech industry.” Source: RevenueBase Database · checked Sep 24, 2026
7	Motionvillee	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	44 contacts →
	Strong evidence “Motionvillee, being a B2B Video First Marketing agency, excels in simplifying your complex services and delivering your message effectively to potential customers.” Source: RevenueBase Database · checked Sep 24, 2026
8	Freemind Seattle	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	41 contacts →
	Strong evidence “Freemind Seattle is a full-service marketing strategy and creative solutions agency that helps brands connect, inspire, and grow.” Source: RevenueBase Database · checked Sep 24, 2026
9	Unreal Digital Group	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	35 contacts →
	Strong evidence “Unreal Digital Group is the full-service, women-owned marketing agency that helps companies look, feel and sound different.” Source: RevenueBase Database · checked Sep 24, 2026
10	Lift Strategy	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	n/a	35 contacts →
	Strong evidence “LIFT provides marketing and technology services that help B2B companies improve results through digital demand generation, marketing automation, CRM and analytics.” Source: RevenueBase Database · checked Sep 24, 2026
11	MILLI	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	33 contacts →
	Partial evidence “Milli is an award-winning, purpose-driven, full service creative agency specializing in strategy, narrative change, and content creative.” Source: RevenueBase Database · checked Sep 24, 2026
12	Bonsai Media Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	29 contacts →
	Indirect evidence “Bonsai Media Group is a digital advertising agency headquartered in Seattle.” Source: RevenueBase Database · checked Sep 24, 2026
13	Hydrogen Advertising	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	25 contacts →
	Indirect evidence “WHAT WE DO: Inspired by the simplest element in the universe, Hydrogen Advertising harnesses the power of simplicity to help local, regional and international advertising clients…” Source: RevenueBase Database · checked Sep 24, 2026
14	Efelle Creative, Digital Marketing Agency	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	24 contacts →
	Partial evidence “efelle is an internationally recognized ecommerce & digital marketing agency based out of Seattle, Washington, delivering highly functional and engaging websites, applications…” Source: RevenueBase Database · checked Sep 24, 2026
15	ODD DOG Media	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	23 contacts →
	Partial evidence “We’re a Seattle-founded marketing agency with established teams in Portland and Salt Lake City, dedicated to serving small and mid-sized businesses.” Source: RevenueBase Database · checked Sep 24, 2026
16	TDW CO	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	22 contacts →
	Indirect evidence “TDW+Co, previously known as T.D.” Source: RevenueBase Database · checked Sep 24, 2026
17	Sellerslice	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	21 contacts →
	Partial evidence “Founded by two Amazon marketing experts with a combined 50 years of eCommerce experience, our goal is to provide a holistic Amazon marketing approach at a cost effective rate.” Source: RevenueBase Database · checked Sep 24, 2026
18	Goodo Studios	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	1-10	19 contacts →
	Indirect evidence “Helping 7-8 figure brands with hassle-free creative that converts!” Source: RevenueBase Database · checked Sep 24, 2026
19	Direct Resources Group, INC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	18 contacts →
	Partial evidence “Formed in Seattle in 1993, Direct Resources Group is a direct marketing agency focusing on lead generation, customer acquisition, cross-sell marketing, membership, and fundraising.” Source: RevenueBase Database · checked Sep 24, 2026
20	Actuate Media	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	1-10	18 contacts →
	Indirect evidence “Actuate Media is a results-driven, industry-leading advertising agency known for 100% transparency, performance-driven strategies, and client success.” Source: RevenueBase Database · checked Sep 24, 2026
21	Parsons CO	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	1-10	18 contacts →
	Partial evidence “From marketing to media relations, strategy to social media, planning to promotions, we bring a unique perspective, uncommon creativity and proven expertise to lifestyle brands.” Source: RevenueBase Database · checked Sep 24, 2026
22	Hunt Marketing Group	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	17 contacts →
	Strong evidence “Hunt Marketing Group is a full service direct marketing agency based in Seattle, WA.” Source: RevenueBase Database · checked Sep 24, 2026
23	Logic Inbound	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	16 contacts →
	Indirect evidence “Logic Inbound identifies and executes on growth opportunities.” Source: RevenueBase Database · checked Sep 24, 2026
24	Marketeering Group	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	16 contacts →
	Partial evidence “Marketeering Group is the digital marketing agency delivering flexible solutions to complex problems with strategic and impact-driven SEO implementation.” Source: RevenueBase Database · checked Sep 24, 2026
25	Fujisan Marketing	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	1-10	15 contacts →
	Partial evidence “We help businesses achieve their desired results by creating fully transparent, customized digital marketing strategies and tactics.” Source: RevenueBase Database · checked Sep 24, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: full service B2B marketing agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names full service B2B marketing agencies.
Partial evidence: Its own public description names part of full service B2B marketing agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name full service B2B marketing agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 363 full service B2B marketing agencies based in Seattle, United States

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Full service B2B marketing agencies based in Seattle, United States at a glance

As of Sep 24, 2026

29.5%Verified-email coverage

6.6Average contacts per company

1-10Median size (employees)

625.9%Largest-city concentration · New York

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

279

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 363 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 full service B2B marketing agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Seattle, United States whose own description of what they do matches “full service B2B marketing agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names full service B2B marketing agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among full service B2B marketing agencies, and records with no verified work email. Companies headquartered outside Seattle 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 its RevenueBase Smart Search 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, 710 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 24, 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.

Full service B2B marketing agencies by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names full service B2B marketing agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many full service B2B marketing agencies are there based in Seattle, United States?

RevenueBase identified 363 full service B2B marketing agencies headquartered in Seattle, 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?

NEW Engen, headquartered in Seattle, tops this list with the largest team on record.

Which city has the most full service B2B marketing agencies?

New York leads with 2272 headquartered companies, followed by Los Angeles (1563) and Miami (1087).

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 710 verified decision-maker contacts tracked across these 363 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 24, 2026.

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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 Smart Search, 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.