Company lists · Data refreshed September 2026

Top 25 IT consultancy firms based in Herndon, United States

Name: IT consultancy firms based in Herndon, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 151 companies tracked

RevenueBase identified 151 IT consultancy firms headquartered in Herndon, United States as of September 2026 and tracks 6,429 professional contacts across them, including 1,980 with verified work emails. Across the United States, New York is the largest hub for this category (1,055 companies); Herndon has 151.

This list covers IT consultancy firms headquartered in Herndon, 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 27, 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 27, 2026 86% judged on-target in blind review

151Companies

6,429Contacts tracked

1,980Verified emails

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The 25 largest IT consultancy firms based in Herndon, United States

Ranked by team size

Top 25 of 151 IT consultancy firms based in Herndon, United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to IT consultancy firms: 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	Eplus INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,749 contacts →
	Partial evidence “ePlus is a customer-first, services-led, results-driven and trusted industry leader that helps organizations secure, modernize, optimize, and scale every aspect of their IT…” Source: RevenueBase Database · checked Sep 27, 2026
2	Idexcel	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	501-1,000	870 contacts →
	Indirect evidence “Idexcel is a Professional Services and Technology Solutions provider specializing in Cloud Services, Cloud Native Services, Data Platforms and Intelligence, Automation & AI.” Source: RevenueBase Database · checked Sep 27, 2026
3	Softility, INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	201-500	321 contacts →
	Indirect evidence “Softility is a digital transformation technology services company, specializing in innovative solutions across cloud adoption and modernization, data engineering and analytics…” Source: RevenueBase Database · checked Sep 27, 2026
4	TD Synnex Public Sector	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	201-500	292 contacts →
	Indirect evidence “For more than 30 years, TD SYNNEX Public Sector has been dedicated to accelerating public sector growth for technology companies.” Source: RevenueBase Database · checked Sep 27, 2026
5	Netimpact Strategies INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	201-500	254 contacts →
	Indirect evidence “NetImpact has been a Trusted Advisor driving impact through digital transformation for the Federal Government for over a decade.” Source: RevenueBase Database · checked Sep 27, 2026
6	Viitorcloud Technologies	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	201-500	239 contacts →
	Indirect evidence “Empowering businesses to become future-ready, today!” Source: RevenueBase Database · checked Sep 27, 2026
7	Pcm-G	Partial evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	1,001-5,000	176 contacts →
	Partial evidence “PCM-G is a division of Insight Enterprises, Inc.\| Together, we’ll help you navigate complex IT challenges.” Source: RevenueBase Database · checked Sep 27, 2026
8	Idea Entity	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	145 contacts →
	Indirect evidence “Idea Entity makes ideas real through the application of technology.” Source: RevenueBase Database · checked Sep 27, 2026
9	Vista Applied Solutions Group INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	201-500	131 contacts →
	Indirect evidence “VASG Inc has a strong reputation as a business and information technology consulting company.” Source: RevenueBase Database · checked Sep 27, 2026
10	EMW	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	127 contacts →
	Indirect evidence “EMW was founded in 1995 by engineers and managers who formerly held senior positions in well known telecommunications and information technology companies to pursue their vision…” Source: RevenueBase Database · checked Sep 27, 2026
11	Everestek	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	122 contacts →
	Indirect evidence “Everestek is a modern technology services & solutions company where our goal is to help clients with their technology needs.” Source: RevenueBase Database · checked Sep 27, 2026
12	Indigo IT LLC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	101 contacts →
	Partial evidence “Founded in 2001, Indigo IT is an award winning information technology consulting and services company.” Source: RevenueBase Database · checked Sep 27, 2026
13	Eksource Technologies, INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	94 contacts →
	Indirect evidence “Founded in 2008, ekSource Technologies is committed to providing value through the effective use of technology.” Source: RevenueBase Database · checked Sep 27, 2026
14	SSA Tech INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	201-500	70 contacts →
	Partial evidence “SSA Tech Inc is an IT Technical consulting solutions and services provider with proven expertise across various technologies.” Source: RevenueBase Database · checked Sep 27, 2026
15	Reston Consulting Group, INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	65 contacts →
	Partial evidence “Network Design * Engineering * Integration * Operations * Security RCG has more than 35 years' experience supporting some of the world's largest and most highly visible IT…” Source: RevenueBase Database · checked Sep 27, 2026
16	Allwyn Corporation	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	52 contacts →
	Indirect evidence “Allwyn Corporation, headquartered in Washington DC, was founded in 2003 with a mission to help customers solve complex technology problems by bringing tools, technologies…” Source: RevenueBase Database · checked Sep 27, 2026
17	Solution Street	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	47 contacts →
	Indirect evidence “We are a passionate team of builders and problem solvers!” Source: RevenueBase Database · checked Sep 27, 2026
18	Cliff Services INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	46 contacts →
	Indirect evidence “Cliff Services is a technology and professional services group, founded in the UK in 2008 and operating across the UK, USA, Ireland, Canada, Australia and India, with UAE and…” Source: RevenueBase Database · checked Sep 27, 2026
19	Infoserv LLC	Strong evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	44 contacts →
	Strong evidence “With a strong team of 100+ consultants with over 12+ years of experience, we have proven ourselves repeatedly at several Fortune 100 as well as Fortune 500 companies, when it…” Source: RevenueBase Database · checked Sep 27, 2026
20	Technik, INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	35 contacts →
	Indirect evidence “Technik, Inc.(Technik), is an 8(a) Certified, ISO 9001:2008 Registered, CMMI L3 Appraised professional services company, committed to assisting industry and government harness the…” Source: RevenueBase Database · checked Sep 27, 2026
21	IT Partners, INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	34 contacts →
	Partial evidence “Privately held and founded in 1993, IT Partners Inc.” Source: RevenueBase Database · checked Sep 27, 2026
22	Shiv Software Experts	Partial evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	33 contacts →
	Partial evidence “Shiv Software Experts (SSE) is a global provider of IT staffing, non-IT recruitment, technology consulting, and SaaS development services.” Source: RevenueBase Database · checked Sep 27, 2026
23	Infotek Solutions INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	11-50	32 contacts →
	Partial evidence “Infotek Solutions Inc is IT Consulting, Training & Manpower Staffing Company renowned for services and business solutions that are built around our clients need.” Source: RevenueBase Database · checked Sep 27, 2026
24	Oran INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	29 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
25	Exatech Solutions, INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	29 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 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: IT consultancy firms. 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 IT consultancy firms.
Partial evidence: Its own public description names part of IT consultancy firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT consultancy firms. 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 151 IT consultancy firms based in Herndon, United States

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IT consultancy firms based in Herndon, United States at a glance

As of Sep 27, 2026

30.8%Verified-email coverage

42.6Average contacts per company

11-50Median size (employees)

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Herndon, so it is reported there. Company counts and contact totals on this page are exact for Herndon, over 151 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 IT consultancy firms, 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 Herndon, United States whose own description of what they do matches “IT consultancy firms”. 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 IT consultancy firms), 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 IT consultancy firms, and records with no verified work email. Companies headquartered outside Herndon 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, 1,980 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 27, 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.

IT consultancy firms 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 IT consultancy firms, 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 IT consultancy firms are there based in Herndon, United States?

RevenueBase identified 151 IT consultancy firms headquartered in Herndon, 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?

Eplus INC, headquartered in Herndon, tops this list with the largest team on record.

Which city in the United States has the most IT consultancy firms?

New York leads the United States with 1,055 headquartered companies, followed by Houston (669) and Chicago (543). Herndon has 151.

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 1,980 verified decision-maker contacts tracked across these 151 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 27, 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.