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Company lists · Data refreshed September 2026

Top 25 B2B consultancy services based in Fairfax, United States

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 75 companies tracked

RevenueBase identified 75 B2B consultancy services headquartered in Fairfax, United States as of September 2026 and tracks 1,012 professional contacts across them, including 227 with verified work emails. New York is the largest hub.

This list covers B2B consultancy services headquartered in Fairfax, 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 23, 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 23, 2026 86% judged on-target in blind review
75Companies
1,012Contacts tracked
227Verified emails
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The 25 largest B2B consultancy services based in Fairfax, United States

Ranked by team size
Top 25 of 75 B2B consultancy services based in Fairfax, United States, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to B2B consultancy services: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1
Concept Plus, LLC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 2026201-500168 contacts →

Indirect evidence

“Concept Plus is a technology services company offering deep technical expertise, an experienced team, and a dedication to maximizing business productivity.”

Source: RevenueBase Database · checked Sep 23, 2026
2
Mcking Consulting
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202651-200118 contacts →

Indirect evidence

“McKing Consulting Corporation provides a variety of general and specialized management consulting services to the federal government, state agencies, nonprofits, and public and…”

Source: RevenueBase Database · checked Sep 23, 2026
3
Hadiamondstar Software Solutions LLC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202651-20098 contacts →

Indirect evidence

“Hadiamondstar Software Solutions LLC Known as is a leading Global Consulting and IT Services company, offering a wide array of solutions ranging from strategy consulting right…”

Source: RevenueBase Database · checked Sep 23, 2026
4
Widelity, INC
Indirect evidenceFairfax, United StatesHQ checked Sep 23, 202651-20092 contacts →

Indirect evidence

“Founded in 2006, Widelity is a leading provider of business and network engineering consulting to global technology driven industries.”

Source: RevenueBase Database · checked Sep 23, 2026
5
ERPI
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 2026201-50057 contacts →

Indirect evidence

“Enterprise Resource Performance Inc.(ERPi) is a professional services rm that delivers strategic, advisory, technological, and implementation support services to Federal Agencies.”

Source: RevenueBase Database · checked Sep 23, 2026
6
Karmastaff
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-5037 contacts →

Indirect evidence

“We specialize in providing a wide range of business services that enable organizations to delegate non-core functions to our experts.”

Source: RevenueBase Database · checked Sep 23, 2026
7
Pivot Path Solutions
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-5016 contacts →

Indirect evidence

“Pivot Path Solutions is a small business consulting firm focused on helping organizations improve operations and program performance.”

Source: RevenueBase Database · checked Sep 23, 2026
8
Piper Strategies
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-5013 contacts →

Indirect evidence

“Stacey Piper Consulting, LLC was established to help small and emerging mid-market businesses and non-profits challenged with advancing their marketing strategy and brand position…”

Source: RevenueBase Database · checked Sep 23, 2026
9
Tellenger
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-5013 contacts →

Indirect evidence

“Tellenger specializes in software development, enterprise IT and cloud solutions.”

Source: RevenueBase Database · checked Sep 23, 2026
10
Symposit LLC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-5013 contacts →

Indirect evidence

“Symposit LLC is an advisory management firm that specializes in leveraging information technology (IT) to provide value to it's clients by optimizing operations, reducing risk…”

Source: RevenueBase Database · checked Sep 23, 2026
11
Arena Strategic Advisors, LLC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 20261-1010 contacts →

Indirect evidence

“Arena provides a full spectrum of strategic planning, corporate development, M&A due diligence, post-merger integration, and operational improvement consulting services to…”

Source: RevenueBase Database · checked Sep 23, 2026
12
BG Consulting Services, LLC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 2026201-50010 contacts →

Indirect evidence

“The Eagle is admired world over as a symbol of power, freedom, and transcendence.”

Source: RevenueBase Database · checked Sep 23, 2026
13
Xcelerator Group
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-509 contacts →

Indirect evidence

“The Xcelerator Group was founded to help companies expand their businesses.”

Source: RevenueBase Database · checked Sep 23, 2026
14
TOP Corner Consulting
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-508 contacts →

Indirect evidence

“Top Corner Consulting specializes in helping organizations establish and implement clear, innovative strategies that drastically improve operations and performance.”

Source: RevenueBase Database · checked Sep 23, 2026
15
Vanguard Management Solutions, INC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-508 contacts →

Indirect evidence

“Vanguard Management Solutions (VMGTS) is a minority-owned cybersecurity and technology firm serving government and commercial organizations.”

Source: RevenueBase Database · checked Sep 23, 2026
16
EKO Strategies, LLC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-507 contacts →

Indirect evidence

“When it comes to technology, one thing for certain is that nothing is going to stay the same.”

Source: RevenueBase Database · checked Sep 23, 2026
17
Green Elephant LLC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 20261-106 contacts →

Indirect evidence

“Green Elephant is now Veloraa.”

Source: RevenueBase Database · checked Sep 23, 2026
18
Rcsi SBA 8 A Certified Edwosb
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-505 contacts →

Indirect evidence

“Established in 2011, Ryansh Corporate Solutions, LLC.(RCSI) is an SBA 8(a) Certified and Economically Disadvantaged Women-Owned Small Business (EDWOSB) dedicated to expertly…”

Source: RevenueBase Database · checked Sep 23, 2026
19
Clarus Consulting LLC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-505 contacts →

Indirect evidence

“Clarus Consulting was created as a Limited Liability Company in Virginia in April Clarus has private clients in financial services, education finance, information technology, and…”

Source: RevenueBase Database · checked Sep 23, 2026
20
Codifyiq
Partial evidenceFairfax, VA, United StatesHQ checked Sep 23, 20261-104 contacts →

Partial evidence

“CodifyIQ is a technology consultancy that passionately helps companies realize their strategic technology goals.”

Source: RevenueBase Database · checked Sep 23, 2026
21
Kairos Pulse
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 20261-104 contacts →

Indirect evidence

“| ratika.kairos (skype)| ratika.garg@kairospulse.com |(+1) 240 449 6818 /(+1) 240 422 0055 KAIROS Pulse was founded with a clear mission to empower sales and channel partners to…”

Source: RevenueBase Database · checked Sep 23, 2026
22
AMS Experts IT Consulting
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-504 contacts →

Indirect evidence

“AMS Experts is a leading IT consulting firm committed to providing innovative solutions for associations, nonprofits, and other organizations.”

Source: RevenueBase Database · checked Sep 23, 2026
23
Sangha Cpa, P.C
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 20261-104 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 23, 2026
24
Excelsior Consulting Group, LLC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 202611-504 contacts →

Indirect evidence

“Excelsior Consulting Group LLC is a Woman and Minority owned SBA 8(m) business with a pending application for SBA 8(a) certification.”

Source: RevenueBase Database · checked Sep 23, 2026
25
The Quiah Group, LLC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 23, 20261-104 contacts →

Indirect evidence

“Quiah Group is a consulting firm that delivers expert, objective insights, a tailored approach and unparalleled collaboration to help leaders.”

Source: RevenueBase Database · checked Sep 23, 2026

Showing 25 of 75 B2B consultancy services based in Fairfax, United States

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B2B consultancy services based in Fairfax, United States at a glance

As of Sep 23, 2026
22.4%Verified-email coverage
13.5Average contacts per company
1-10Median size (employees)
1910.7%Largest-city concentration · New York
Sep 23, 2026Page data refreshed

Companies by employee count

1-10
46
11-50
20
51-200
5
201-500
4

Email recency for this list is measured across the whole United States list rather than for Fairfax, so it is reported there. Company counts and contact totals on this page are exact for Fairfax, over 75 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 B2B consultancy services, 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 Fairfax, United States whose own description of what they do matches “B2B consultancy services”. 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 B2B consultancy services), 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 B2B consultancy services, and records with no verified work email. Companies headquartered outside Fairfax 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, 227 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 23, 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.

B2B consultancy services 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 B2B consultancy services, 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 B2B consultancy services are there based in Fairfax, United States?

RevenueBase identified 75 B2B consultancy services headquartered in Fairfax, 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?

Concept Plus, LLC, headquartered in Fairfax, tops this list with the largest team on record.

Which city has the most B2B consultancy services?

New York leads with 1433 headquartered companies, followed by Atlanta (817) and Chicago (792).

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 227 verified decision-maker contacts tracked across these 75 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 23, 2026.

Ready to reach these companies? Verified emails and direct dials for all 75 B2B consultancy services based in Fairfax, United States. Start with a free account, no credit card.

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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.

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