Company lists · Data refreshed September 2026

Top 25 Software engineering firms based in Fairfax, United States

Name: Software engineering firms based in Fairfax, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 123 companies tracked

RevenueBase identified 123 software engineering firms headquartered in Fairfax, United States as of September 2026 and tracks 6,900 professional contacts across them, including 1,677 with verified work emails. New York is the largest hub.

This list covers software engineering firms 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 6, 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 6, 2026 86% judged on-target in blind review

123Companies

6,900Contacts tracked

1,677Verified emails

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The 25 largest software engineering firms based in Fairfax, United States

Ranked by team size

Top 25 of 123 software engineering firms based in Fairfax, United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to software engineering 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	3pillar	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,575 contacts →
	“At 3Pillar, we believe something truly incredible happens at the intersection of product engineering and cognitive computing.” Source: company website · checked Sep 6, 2026
2	ASM Research	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,568 contacts →
	“ASM Research, an Accenture Federal Services Company, is an information solutions integrator and a leading provider of innovative technology solutions and advanced analytical…” Source: company website · checked Sep 6, 2026
3	Ionidea	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	1,001-5,000	784 contacts →
	Source: company website · checked Sep 6, 2026
4	Future Technologies INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	201-500	197 contacts →
	“FTI is dedicated to empowering customers with mission-critical technology solutions, helping solve their most complex challenges.” Source: company website · checked Sep 6, 2026
5	Nationwide IT Services, INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	201-500	190 contacts →
	“Nationwide IT Services, Inc.(NIS) is designated 8(a) by the SBA, and a CVE verified Service Disabled Veteran Owned Small Business (SDVOSB) Information Technology (IT) and…” Source: company website · checked Sep 6, 2026
6	Concept Plus, LLC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	201-500	168 contacts →
	“Concept Plus is a technology services company offering deep technical expertise, an experienced team, and a dedication to maximizing business productivity.” Source: company website · checked Sep 6, 2026
7	Pyramid Systems, INC	Strong evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	51-200	150 contacts →
	“Pyramid Systems, Inc.(Pyramid) is an award winning, employee owned (ESOP) business that has provided full-service technology consulting and software engineering solutions for…” Source: company website · checked Sep 6, 2026
8	ICS Nett, Inc. ICS	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	51-200	140 contacts →
	“ICS is a strategically diversified technology solutions company operating in different markets serving both Federal and Commercial clients with innovations that span…” Source: company website · checked Sep 6, 2026
9	Technatomy Corporation	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	51-200	108 contacts →
	“Technatomy is a dynamic, highly focused, service-disabled, veteran-owned, small business (SDVOSB) government IT contractor positioned to meet the digital transformation needs of…” Source: company website · checked Sep 6, 2026
10	Hadiamondstar Software Solutions LLC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	51-200	98 contacts →
	“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: company website · checked Sep 6, 2026
11	Multivision, INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	501-1,000	95 contacts →
	“Multivision Inc.” Source: company website · checked Sep 6, 2026
12	Inalab	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	51-200	91 contacts →
	“Inalab is a leading IT solutions and strategy consulting firm focused on providing solutions that transform enterprise operations in the government and commercial sectors by…” Source: company website · checked Sep 6, 2026
13	Right&above	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	201-500	83 contacts →
	“Right & Above helps companies use technology and AI to improve how they work, simplify processes, and create new products faster.” Source: company website · checked Sep 6, 2026
14	Vision Point Systems	Strong evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	51-200	82 contacts →
	“Vision Point Systems (VPS) is a software and engineering consulting company serving some of the largest commercial and government organizations around the globe.” Source: company website · checked Sep 6, 2026
15	Tiber Creek Consulting, INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	201-500	73 contacts →
	“Tiber Creek Consulting Inc.” Source: company website · checked Sep 6, 2026
16	Inforeliance	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	201-500	70 contacts →
	“When organizations need to be on time-and on budget-they call InfoReliance.” Source: company website · checked Sep 6, 2026
17	Accelera Solutions	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	51-200	69 contacts →
	“Founded in 2002, Accelera Solutions is an award-winning digital transformation and IT modernization leader.” Source: company website · checked Sep 6, 2026
18	Luzon Technologies INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	51-200	65 contacts →
	“We RECRUIT, We TRAIN, and We STAFF Transforming Challenges into Opportunities!” Source: company website · checked Sep 6, 2026
19	Mind Studios	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	51-200	59 contacts →
	“Founded in 2013, Mind Studios is a custom software development company working with growth-stage and mid-market businesses across the US, UK, Europe, and MENA.” Source: company website · checked Sep 6, 2026
20	Siyaton Global Solutions INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	11-50	58 contacts →
	“Siyaton as the title speaks is an impeccable target oriented company demonstrating equivalent results to every prospect, a universal provider of innovative consulting, technology…” Source: company website · checked Sep 6, 2026
21	Technova Systems	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	51-200	51 contacts →
	“TechNova Systems is a technology consulting and workforce solutions company helping organizations build, scale, and modernize with confidence for 10 Years.” Source: company website · checked Sep 6, 2026
22	Conceras	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	51-200	48 contacts →
	“Conceras, LLC, an SBA 8(a) Certified Small Business, was founded in 2006 as a customer-focused systems engineering consulting firm.” Source: company website · checked Sep 6, 2026
23	Codeplus	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	51-200	46 contacts →
	“At CODEplus, we go beyond traditional technology providers to become your dedicated solution partner.” Source: company website · checked Sep 6, 2026
24	Zimpatica	Partial evidence	Fairfax, United StatesHQ checked Sep 6, 2026	11-50	30 contacts →
	“Zimpatica focuses on modernizing businesses by creating and tailoring software solutions.” Source: company website · checked Sep 6, 2026
25	Moriarty And Associates Consulting Corporation	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 6, 2026	11-50	30 contacts →
	“Moriarty and Associates Consulting Corporation (MAC) is a U.S-based technology company supporting dynamic, complex environments within the military, intelligence, and private…” Source: company website · checked Sep 6, 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: software engineering 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 software engineering firms.
Partial evidence: Its own public description names part of software engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name software engineering 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 123 software engineering firms based in Fairfax, United States

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Software engineering firms based in Fairfax, United States at a glance

As of Sep 6, 2026

24.3%Verified-email coverage

56.1Average contacts per company

11-50Median size (employees)

865.9%Largest-city concentration · New York

Sep 6, 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 this city, so it is reported there. Company counts and contact totals on this page are exact for Fairfax, over 123 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 software engineering 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 Fairfax, United States whose own description of what they do matches “software engineering 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 software engineering 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 software engineering firms, 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, 1,677 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 6, 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.

Software engineering 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 software engineering 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 software engineering firms are there based in Fairfax, United States?

RevenueBase identified 123 software engineering firms 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?

3pillar, headquartered in Fairfax, tops this list with the largest team on record.

Which city has the most software engineering firms?

New York leads with 1065 headquartered companies, followed by Houston (648) and Austin (633).

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 1,677 verified decision-maker contacts tracked across these 123 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 6, 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.