Company lists · Data refreshed September 2026

Top 25 Government software contractors based in the United States

Name: Government software contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 1,232 companies tracked

RevenueBase identified 1,232 government software contractors headquartered in the United States as of September 2026 and tracks 117,755 professional contacts across them, including 30,946 with verified work emails and 52,720 with mobile numbers. Washington is the largest hub.

This list covers government software contractors headquartered in the 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 3, 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 3, 2026 86% judged on-target in blind review

1,232Companies

117,755Contacts tracked

30,946Verified emails

52,720Mobile numbers

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The 25 largest government software contractors based in the United States

Ranked by team size

Top 25 of 1,232 government software contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to government software contractors: 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	General Dynamics Information Technology	Indirect evidence	Falls Church, VA, United StatesHQ checked Sep 3, 2026	10001+	24,019 contacts →
	Indirect evidence “GDIT is a global technology and professional services company that delivers solutions, technology and mission services to every major agency across the U.S.” Source: RevenueBase Database · checked Sep 3, 2026
2	Mantech	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 3, 2026	5,001-10,000	9,756 contacts →
	Indirect evidence “MANTECH is more than a technology company.” Source: RevenueBase Database · checked Sep 3, 2026
3	Tyler Technologies	Partial evidence	Plano, ID, United StatesHQ checked Sep 3, 2026	5,001-10,000	6,863 contacts →
	Partial evidence “Tyler Technologies (NYSE: TYL) provides integrated software and technology services to the public sector.” Source: RevenueBase Database · checked Sep 3, 2026
4	Asrc Federal	Indirect evidence	Reston, VA, United StatesHQ checked Sep 3, 2026	5,001-10,000	4,524 contacts →
	Indirect evidence “ASRC Federal’s employees provide solutions for more than 30 U.S.” Source: RevenueBase Database · checked Sep 3, 2026
5	Fast Enterprises, LLC	Strong evidence	Centennial, ME, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,378 contacts →
	Strong evidence “For 25+ years, we’ve transformed the way government agencies serve their communities, providing software that delivers superior customer experiences, greater flexibility, and…” Source: RevenueBase Database · checked Sep 3, 2026
6	American Systems	Strong evidence	Mclean, VA, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,899 contacts →
	Strong evidence “Founded in 1975, AMERICAN SYSTEMS is an employee-owned federal government contractor supporting national priority programs through our strategic solutions in the areas of…” Source: RevenueBase Database · checked Sep 3, 2026
7	DCS Corp	Partial evidence	Alexandria, VA, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,884 contacts →
	Partial evidence “DCS delivers advanced technology and management solutions to Government agencies in the national security sector.” Source: RevenueBase Database · checked Sep 3, 2026
8	DMI	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,693 contacts →
	Indirect evidence “DMI is a leading provider of digital services and technology solutions with a focus on end-to-end managed services, including managed mobility, cloud, cybersecurity, network…” Source: RevenueBase Database · checked Sep 3, 2026
9	Intrepidgs	Indirect evidence	Cape Canaveral, FL, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,410 contacts →
	Indirect evidence “At Intrepid Global Solutions, we lead the way in mission-critical support where others can’t.” Source: RevenueBase Database · checked Sep 3, 2026
10	Radiance Technologies	Indirect evidence	Huntsville, LA, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,037 contacts →
	Indirect evidence “Radiance Technologies, Inc.” Source: RevenueBase Database · checked Sep 3, 2026
11	The MIL Corporation	Partial evidence	Bowie, MD, United StatesHQ checked Sep 3, 2026	501-1,000	942 contacts →
	Partial evidence “Established in 1980, MIL provides innovative cyber, engineering, financial, and information technology services to the federal government.” Source: RevenueBase Database · checked Sep 3, 2026
12	Civicplus	Partial evidence	Manhattan, KS, United StatesHQ checked Sep 3, 2026	501-1,000	906 contacts →
	Partial evidence “CivicPlus is the only government technology company exclusively committed to powering and empowering governments to efficiently operate, serve, and govern through the use of our…” Source: RevenueBase Database · checked Sep 3, 2026
13	REI Systems	Indirect evidence	Sterling, VA, United StatesHQ checked Sep 3, 2026	501-1,000	861 contacts →
	Indirect evidence “REI Systems delivers reliable and innovative technology solutions that empower federal, state, local, and nonprofit organizations to achieve their missions.” Source: RevenueBase Database · checked Sep 3, 2026
14	Cognosante	Indirect evidence	Falls Church, VA, United StatesHQ checked Sep 3, 2026	1,001-5,000	830 contacts →
	Indirect evidence “At Cognosante, we help create a safe, healthy, more equitable nation for all.” Source: RevenueBase Database · checked Sep 3, 2026
15	I3 Verticals	Partial evidence	Nashville, TN, United StatesHQ checked Sep 3, 2026	1,001-5,000	817 contacts →
	Partial evidence “i3 Verticals seamlessly delivers integrated software and services to customers in Public Sector markets.” Source: RevenueBase Database · checked Sep 3, 2026
16	Calibre Systems, INC	Partial evidence	Alexandria, VA, United StatesHQ checked Sep 3, 2026	501-1,000	771 contacts →
	Partial evidence “CALIBRE Systems, Inc.(CALIBRE) is an employee-owned mission-focused solutions and digital transformation company supporting government and industry.” Source: RevenueBase Database · checked Sep 3, 2026
17	KAY And Associates, INC	Indirect evidence	Buffalo Grove, IL, United StatesHQ checked Sep 3, 2026	501-1,000	752 contacts →
	Indirect evidence “Kay and Associates, Inc.(KAI) was established in 1960 by our founder Donald Kay to provide high quality, cost effective solutions in response to the need for engineering and…” Source: RevenueBase Database · checked Sep 3, 2026
18	Hx5, LLC	Partial evidence	Fort Walton Beach, AL, United StatesHQ checked Sep 3, 2026	1,001-5,000	679 contacts →
	Partial evidence “HX5, LLC has specialized in providing professional support services to meet the needs of Federal Government organizations since its incorporation in 2004.” Source: RevenueBase Database · checked Sep 3, 2026
19	Neogov	Partial evidence	El Segundo, CA, United StatesHQ checked Sep 3, 2026	501-1,000	678 contacts →
	Partial evidence “For over 25 years, NEOGOV has been at the forefront of public-sector innovation, building technology that helps government and education organizations work smarter, move faster…” Source: RevenueBase Database · checked Sep 3, 2026
20	Telos Corporation	Indirect evidence	Ashburn, NV, United StatesHQ checked Sep 3, 2026	501-1,000	636 contacts →
	Indirect evidence “Telos empowers and protects the world’s most security-conscious organizations with solutions for continuous security assurance of individuals, systems, and information.” Source: RevenueBase Database · checked Sep 3, 2026
21	Planned Systems International	Partial evidence	Columbia, FL, United StatesHQ checked Sep 3, 2026	1,001-5,000	608 contacts →
	Partial evidence “Since 1988, PSI teams have provided our government customers with innovative, cost effective solutions that solve today’s complex challenges, improve operational efficiencies, and…” Source: RevenueBase Database · checked Sep 3, 2026
22	Tista Science And Technology Corporation	Partial evidence	Rockville, MD, United StatesHQ checked Sep 3, 2026	1,001-5,000	537 contacts →
	Partial evidence “Since 2005, TISTA has been a trusted partner with innovative IT solutions for the federal government.” Source: RevenueBase Database · checked Sep 3, 2026
23	Euna Solutions	Strong evidence	Sandy Springs, GA, United StatesHQ checked Sep 3, 2026	501-1,000	517 contacts →
	Strong evidence “Euna Solutions® is a leading provider of purpose-built, cloud-based software that helps public sector and government organizations streamline procurement, budgeting, payments…” Source: RevenueBase Database · checked Sep 3, 2026
24	Vencore INC	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 3, 2026	1,001-5,000	486 contacts →
	Indirect evidence “As of June 1, 2018, we are Perspecta.” Source: RevenueBase Database · checked Sep 3, 2026
25	Tapestry Solutions	Strong evidence	San Diego, CA, United StatesHQ checked Sep 3, 2026	501-1,000	414 contacts →
	Strong evidence “Leveraging three decades of experience, Tapestry Solutions is a global provider of information management software and services for defense, government and commercial customers.” Source: RevenueBase Database · checked Sep 3, 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: government software contractors. 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 government software contractors.
Partial evidence: Its own public description names part of government software contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government software contractors. 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 1,232 government software contractors based in the United States

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Government software contractors based in the United States at a glance

As of Sep 3, 2026

26.3%Verified-email coverage

44.8%Mobile-number coverage

95.6Average contacts per company

11-50Median size (employees)

4.5%Largest-city concentration · Washington

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

372

11-50

403

51-200

295

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

2,57731–60

17,09761–90

9,89290–180

1,380180+

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 government software contractors, 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 the United States whose own description of what they do matches “government software contractors”. 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 government software contractors), 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 government software contractors, and records with no verified work email. Companies headquartered outside United States 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, 30,946 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.

Government software contractors by metro

Government software contractors in Washington55
Government software contractors in Herndon42
Government software contractors in Chantilly40
Government software contractors in Reston40
Government software contractors in Vienna28
Government software contractors in Mclean27
Government software contractors in Fairfax26

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 government software contractors, 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 government software contractors are there based in the United States?

RevenueBase identified 1,232 government software contractors headquartered in the 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?

General Dynamics Information Technology, headquartered in Falls Church, tops this list with the largest team on record.

Which city has the most government software contractors?

Washington leads with 55 headquartered companies, followed by Herndon (42) and Chantilly (40).

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 30,946 verified decision-maker contacts tracked across these 1,232 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 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.