Company lists · Data refreshed September 2026

Top 25 HR outsourcing advisors based in Seattle, United States

Name: HR outsourcing advisors based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 73 companies tracked

RevenueBase identified 73 HR outsourcing advisors headquartered in Seattle, United States as of September 2026 and tracks 417 professional contacts across them, including 148 with verified work emails. Across the United States, New York is the largest hub for this category (464 companies); Seattle has 73.

This list covers HR outsourcing advisors 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 30, 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 30, 2026 86% judged on-target in blind review

73Companies

417Contacts tracked

148Verified emails

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The 25 largest HR outsourcing advisors based in Seattle, United States

Ranked by team size

Top 25 of 73 HR outsourcing advisors based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to HR outsourcing advisors: 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	The Institute For Corporate Productivity I4cp	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	51-200	94 contacts →
	Indirect evidence “The Institute for Corporate Productivity (i4cp) is the leading global research and consulting firm dedicated to helping organizations build high-performance organizations.” Source: RevenueBase Database · checked Sep 30, 2026
2	PAYNW	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	51-200	49 contacts →
	Indirect evidence “At PayNW, we help businesses make sense of payroll and HCM as things get more complex.” Source: RevenueBase Database · checked Sep 30, 2026
3	Redcley Partners	Indirect evidence	Seattle, United StatesHQ checked Sep 30, 2026	51-200	29 contacts →
	Indirect evidence “We partner with our Clients to support them across their business with staffing and consulting services, full-time employees, and project based solutions.” Source: RevenueBase Database · checked Sep 30, 2026
4	Highbrow LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	11-50	28 contacts →
	Indirect evidence “Highbrow LLC" has been founded by professionals having deep industry experience.” Source: RevenueBase Database · checked Sep 30, 2026
5	Seattle Corporate Search	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	11-50	24 contacts →
	Indirect evidence “As a boutique, woman-owned talent acquisition agency, SCS specializes in building powerhouse teams for everyone from fast-growing startups to established enterprise companies.” Source: RevenueBase Database · checked Sep 30, 2026
6	Plum Coaching & HR Consulting	Partial evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	11-50	20 contacts →
	Partial evidence “Plum provides a range of HR services, as well as career-related coaching.” Source: RevenueBase Database · checked Sep 30, 2026
7	Sojust Solutions	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	11-50	12 contacts →
	Indirect evidence “SoJust Solutions is a majority women-owned and minority-owned business, offering full service staffing and consulting services to organizations of all sizes.” Source: RevenueBase Database · checked Sep 30, 2026
8	AGG	Indirect evidence	Seattle, United StatesHQ checked Sep 30, 2026	1-10	10 contacts →
	Indirect evidence “AGG is a husband-wife team operating out of West Seattle with over 25 years’ experience in manufacturing recruiting & marketing and offering job seekers professional services such…” Source: RevenueBase Database · checked Sep 30, 2026
9	S Piper Staffing LLC	Indirect evidence	Seattle, United StatesHQ checked Sep 30, 2026	1-10	7 contacts →
	Indirect evidence “S Piper Staffing is an industry-leading nationwide woman owned minority recruiting firm that identifies talented job seekers whose interests and values align with those of their…” Source: RevenueBase Database · checked Sep 30, 2026
10	HR Group International	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	6 contacts →
	Indirect evidence “Human Resources Group International, Inc.(HRGI) is a group of Human Resources consultants with over 25 years of experience in the field providing comprehensive human resources…” Source: RevenueBase Database · checked Sep 30, 2026
11	Talented Recruiting	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	11-50	5 contacts →
	Indirect evidence “Talented Recruiting is a boutique executive search and embedded talent partner for venture-backed startups and growth-stage technology companies.” Source: RevenueBase Database · checked Sep 30, 2026
12	Tandem Motion	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	4 contacts →
	Indirect evidence “We are a boutique workforce strategy consulting firm focused on aligning culture, people, structure, and human capital metrics with the business strategy.” Source: RevenueBase Database · checked Sep 30, 2026
13	Emerald Talent	Partial evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	11-50	4 contacts →
	Partial evidence “Emerald Talent is a Tech Recruiting firm specializing in On-Demand, RPO (recruitment process outsourcing), and customized recruiting services.” Source: RevenueBase Database · checked Sep 30, 2026
14	Cavnesshr	Partial evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	4 contacts →
	Partial evidence “At cavnessHR we deliver HR to companies with 49 or fewer people across the U.S.” Source: RevenueBase Database · checked Sep 30, 2026
15	Talentlign INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	4 contacts →
	Indirect evidence “When it comes to unlocking the full potential of your workforce, one size does not fit all.” Source: RevenueBase Database · checked Sep 30, 2026
16	Trillium Hiring Services	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	3 contacts →
	Indirect evidence “Delivering Talent Management Strategy, Hiring Process Consulting and Tactical Execution for stage appropriate growth.” Source: RevenueBase Database · checked Sep 30, 2026
17	Modern Human HR	Partial evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	3 contacts →
	Partial evidence “Modern Human helps people be and do their best for the benefit of innovative Pacific Northwest companies that see HR as a tool for achieving strategic goals.” Source: RevenueBase Database · checked Sep 30, 2026
18	The Barbelo Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	11-50	3 contacts →
	Indirect evidence “The Barbelo Group specializes on the People side of the business.” Source: RevenueBase Database · checked Sep 30, 2026
19	Hruprise	Partial evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	3 contacts →
	Partial evidence “We support employees with independent HR coaching.” Source: RevenueBase Database · checked Sep 30, 2026
20	Kohr Consulting, LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	2 contacts →
	Indirect evidence “Our philosophy on building a successful recruitment program lies in 3 core fundamentals: Employer Brand, Recruiting Process and Employee Employee Engagement.” Source: RevenueBase Database · checked Sep 30, 2026
21	HR Consultant Solutions, LLC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	2 contacts →
	Partial evidence “HR Consultant Solutions, LLC partners with mid to large-sized companies to measurably improve employee and organizational performance while minimizing employment practice risk.” Source: RevenueBase Database · checked Sep 30, 2026
22	Alignmental	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	1 contacts →
	Indirect evidence “I advise clients on AI technology, business strategy, and organizational development.” Source: RevenueBase Database · checked Sep 30, 2026
23	CDS Human Capital Consulting LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	1 contacts →
	Indirect evidence “cDs Human Capital Consulting LLC was founded in 2016 by Carla S Dye, a human resource consulting company located in the Washington DC Metropolitan area focused on emerging…” Source: RevenueBase Database · checked Sep 30, 2026
24	Insight Placement Solutions	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	1 contacts →
	Indirect evidence “We have a team with over 10 years in the talent placement industry experienced in providing top shelf consultant resources,solving your most challenging business problems.” Source: RevenueBase Database · checked Sep 30, 2026
25	Ballard Talent Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 30, 2026	1-10	1 contacts →
	Indirect evidence “We understand that the right people make all the difference in turning innovative ideas into successful ventures.” Source: RevenueBase Database · checked Sep 30, 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: HR outsourcing advisors. 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 HR outsourcing advisors.
Partial evidence: Its own public description names part of HR outsourcing advisors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name HR outsourcing advisors. 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 73 HR outsourcing advisors based in Seattle, United States

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HR outsourcing advisors based in Seattle, United States at a glance

As of Sep 30, 2026

35.5%Verified-email coverage

5.7Average contacts per company

1-10Median size (employees)

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

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 73 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 HR outsourcing advisors, 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 “HR outsourcing advisors”. 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 HR outsourcing advisors), 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 HR outsourcing advisors, 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, 148 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 30, 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.

HR outsourcing advisors 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 HR outsourcing advisors, 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 HR outsourcing advisors are there based in Seattle, United States?

RevenueBase identified 73 HR outsourcing advisors 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?

The Institute For Corporate Productivity I4cp, headquartered in Seattle, tops this list with the largest team on record.

Which city in the United States has the most HR outsourcing advisors?

New York leads the United States with 464 headquartered companies, followed by Atlanta (283) and Houston (219). Seattle has 73.

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 148 verified decision-maker contacts tracked across these 73 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 30, 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.