Company lists · Data refreshed September 2026

Top 22 Impact measurement consulting firms based in Seattle, United States

RevenueBase identified 56 impact measurement consulting firms headquartered in Seattle, United States as of September 2026 and tracks 371 professional contacts across them, including 186 with verified work emails. New York is the largest hub.

This list covers impact measurement consulting firms 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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 3, 2026 86% judged on-target in blind review
56Companies
371Contacts tracked
186Verified emails
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The 22 largest impact measurement consulting firms based in Seattle, United States

Ranked by team size
Top 22 of 56 impact measurement consulting firms based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names impact measurement consulting firms: 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
ORS ImpactPartial evidence
Seattle, WA, United StatesHQ checked Sep 3, 202611-5036

“We nurture collaborations with our clients, bringing distinctive expertise in planning and measurement, strategy, and evaluation to their most vexing challenges.”

Source: company website · checked Sep 3, 2026
2
Intentional FuturesIndirect evidence
Seattle, WA, United StatesHQ checked Sep 3, 202611-5034

“Why does Intentional Futures exist?”

Source: company website · checked Sep 3, 2026
3
FormativeIndirect evidence
Seattle, WA, United StatesHQ checked Sep 3, 202611-5031

“Driven by work that matters, we help our clients navigate the complex worlds of marketing, advocacy, and technology.”

Source: company website · checked Sep 3, 2026
4
Kinetic WestStrong evidence
Seattle, WA, United StatesHQ checked Sep 3, 202611-5018

“Kinetic West is a social impact consulting firm.”

Source: company website · checked Sep 3, 2026
5
ParitiiPartial evidence
Seattle, WA, United StatesHQ checked Sep 3, 202611-5018

“A dynamic firm specializing in tech-enabled, data-driven strategies that deliver sophisticated, sustainable, and impactful solutions for businesses and communities.”

Source: company website · checked Sep 3, 2026
6
Sankofa Consulting LLCIndirect evidence
Seattle, WA, United StatesHQ checked Sep 3, 202611-5018

“Our team brings expertise in Monitoring, Evaluation, and Learning (MEL) across sectors and geographies, and experience engaging with non-profits of various sizes.”

Source: company website · checked Sep 3, 2026
7
Digbi ConsultingIndirect evidence
Seattle, WA, United StatesHQ checked Sep 3, 202611-5010

“At DigBI, we’re on a mission to transform data into actionable insights that drive growth and positive change for organizations of all sizes.”

Source: company website · checked Sep 3, 2026
8
Abacus Insights PartnersPartial evidence
Seattle, WA, United StatesHQ checked Sep 3, 20261-106

“Abacus Insights Partners is a boutique consulting firm that works with corporate communications departments and public relations (PR) agencies to develop better systems of…”

Source: company website · checked Sep 3, 2026
9
Informed InternationalStrong evidence
Seattle, WA, United StatesHQ checked Sep 3, 20261-105

“Informed International is a monitoring, evaluation, and learning consulting firm focused on quantifying, examining, and improving the impact of development initiatives.”

Source: company website · checked Sep 3, 2026
10
Data2insight LLCStrong evidence
Seattle, WA, United StatesHQ checked Sep 3, 20261-104

“Data2insight LLC applies measurement, evaluation, and assessment to help mission-driven organizations implement a meaningful and impactful DEI+B program or initiative.”

Source: company website · checked Sep 3, 2026
11Seattle, WA, United StatesHQ checked Sep 3, 20261-103

“Helping organizations THRIVE through innovative strategy and rock-solid support!”

Source: company website · checked Sep 3, 2026
12
The Nguyen Solutions LLCIndirect evidence
Seattle, WA, United StatesHQ checked Sep 3, 20261-102

“We are The Nguyen Solutions.”

Source: company website · checked Sep 3, 2026
13
Grizzilla ConsultingPartial evidence
Seattle, United StatesHQ checked Sep 3, 20261-102

“At Grizzilla, we have decades of experience in growth and social impact.”

Source: company website · checked Sep 3, 2026
14
The Briarwood GroupPartial evidence
Seattle, WA, United StatesHQ checked Sep 3, 20261-101

“The Briarwood Group is a leading consulting firm that empowers enterprise businesses and startups to achieve their strategic goals and drive growth in the marketplace.”

Source: company website · checked Sep 3, 2026
15
Vuurtoren, L.L.CPartial evidence
Seattle, United StatesHQ checked Sep 3, 20261-101

“Drawing on extensive experience working in complex international environments, Vuurtoren LLC Chief Executive Officer, Brian McKenna, provides consulting services to organizations…”

Source: company website · checked Sep 3, 2026
16
Pact ThreePartial evidence
Seattle, WA, United StatesHQ checked Sep 3, 20261-101

“No matter your expertise and impact goals, Pact Three can bring you through the process of learning, planning, and building.”

Source: company website · checked Sep 3, 2026
17
Barbara Rosen ConsultingStrong evidence
Seattle, WA, United StatesHQ checked Sep 3, 20261-101

“Barbara Rosen (BR) Consulting helps organizations to develop, improve, and scale social impact programs.”

Source: company website · checked Sep 3, 2026
18
Rhyme ConsultingPartial evidence
Seattle, WA, United StatesHQ checked Sep 3, 20261-101

“Rhyme Consulting helps mission-driven organizations turn complex ideas into clear, compelling stories and bring them to the audiences that matter most.”

Source: company website · checked Sep 3, 2026
19Seattle, WA, United StatesHQ checked Sep 3, 20261-101

“Public Interest Management Group is a social enterprise that delivers strategic consulting services to mission-driven organizations that build healthy communities and protect the…”

Source: company website · checked Sep 3, 2026
20
Clear Moon ConsultingIndirect evidence
Seattle, United StatesHQ checked Sep 3, 20261-101
Source: company website · checked Sep 3, 2026
21
Impactika ConsultingStrong evidence
Seattle, United StatesHQ checked Sep 3, 20261-101

“We at Impactika Consulting help do-gooders do better through Purpose-Propelled® consulting.”

Source: company website · checked Sep 3, 2026
22
Cross Sector Impact, LLCStrong evidence
Seattle, WA, United StatesHQ checked Sep 3, 20261-101

“Cross Sector Impact is a social change and impact consulting firm that sits within the overlapping space of nonprofits, corporations, and philanthropy.”

Source: company website · checked Sep 3, 2026

Showing 22 of 56 impact measurement consulting firms based in Seattle, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 186 reachable decision-makers.

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Impact measurement consulting firms based in Seattle, United States at a glance

As of Sep 3, 2026
1-10Median size (employees)
New YorkLargest hub · 177 HQs
Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
43
11-50
12
51-200
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 Seattle, over 56 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 impact measurement consulting firms, 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 Seattle, United States whose own description of what they do matches “impact measurement consulting firms”. 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 impact measurement consulting firms, 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 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, 186 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 3, 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.

Frequently asked

How many impact measurement consulting firms are there based in Seattle, United States?

RevenueBase identified 56 impact measurement consulting firms 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?

ORS Impact, headquartered in Seattle, tops this list with the largest team on record.

Which city has the most impact measurement consulting firms?

New York leads with 177 headquartered companies, followed by Washington (128) and Chicago (98).

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 186 verified decision-maker contacts tracked across these 56 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 3, 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 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.