Company lists · Data refreshed September 2026
Top 25 Government custom software development companies based in the United States
RevenueBase identified 794 government custom software development companies headquartered in the United States as of September 2026 and tracks 23,132 professional contacts across them, including 10,493 with verified work emails. New York is the largest hub.
This list covers government custom software development companies 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 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.
The 25 largest government custom software development companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 6,842 contacts → | ||||
Partial evidence “Tyler Technologies (NYSE: TYL) provides integrated software and technology services to the public sector.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,363 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 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 823 contacts → | ||||
Strong evidence “i3 Verticals seamlessly delivers integrated software and services to customers in Public Sector markets.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 674 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 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 490 contacts → | ||||
Partial evidence “Accela provides a unified suite of cloud solutions trusted by governments across the globe to accelerate their digital transformation, deliver vital services, and build stronger…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 405 contacts → | ||||
Partial evidence “Softrams, a Tria Federal company builds innovative technology solutions and customer-centric services that are simple, intuitive, and usable across federal industries.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 333 contacts → | ||||
Partial evidence “Ad Hoc is a digital services company that helps the federal government better serve people.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 326 contacts → | ||||
Strong evidence “IS4S was founded by experienced engineers and managers who realize the need to ensure that our government, military, and commercial customers have an alternative to the defense…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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, 2026Thanks. The Data Team will review it. | |||||
| 10 | 281 contacts → | ||||
Indirect evidence “SunGard Public Sector is now Superion.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 211 contacts → | ||||
Strong evidence “Civix is a leading provider of government technology solutions, specializing in business services, elections, ethics, and grants management software.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 175 contacts → | ||||
Strong evidence “Integrated Data Services (IDS) is a leading provider of custom software products and Government financial management services.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 161 contacts → | ||||
Strong evidence “PanApps Inc, is a global software product company that provides solutions and services to help modernize the IT functions of multilateral, government, and private sector…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 160 contacts → | ||||
Indirect evidence “Since 1997, NexGen Technologies, Inc.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 153 contacts → | ||||
Indirect evidence “Protech Solutions, Inc, headquartered in Little Rock, Arkansas, has been at the forefront of GovTech for 30 years.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 153 contacts → | ||||
Partial evidence “Northstrat Incorporated is an employee-owned corporation that provides strategic Information Technology (IT) solutions to US Government agencies in the Intelligence, Defense, and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 147 contacts → | ||||
Strong evidence “We build custom software that solves real business problems, not just software that works, but software that changes how your team operates and how your customers experience your…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 128 contacts → | ||||
Strong evidence “Acclaim Systems is certified minority small business (SBA 8(a) & GSA) and is a leading software solution company offering a multitude of comprehensive and customized services…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 123 contacts → | ||||
Indirect evidence “CentralSquare provides technology solutions that help over 7,500 public sector agencies deliver vital safety and administrative services to 3 out of every 4 residents of the U.S.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 116 contacts → | ||||
Strong evidence “Global Alliant (GA) is an award-winning IT and software development company recognized as one of the nation’s fastest-growing and most innovative technology leaders.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 109 contacts → | ||||
Strong evidence “Offering proven and consistent business success through a unique combination of people, process, and results, Praeses is a leader in software development and services.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 102 contacts → | ||||
Indirect evidence “PMAT is a leading small business dedicated to crafting innovative solutions that elevate mission capabilities.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 97 contacts → | ||||
Strong evidence “HHS Technology Group is a software and solutions company serving the needs of government agencies and public programs.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 97 contacts → | ||||
Strong evidence “Intuites (IES) is a leading software development and consulting firm that is ready to meet every need of your company, firm or corporations.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 91 contacts → | ||||
Partial evidence “Founded in 2010, Chainbridge Solutions is a mission-focused technology company delivering secure, mission-critical software and services for federal agencies.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
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 custom software development companies. 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 custom software development companies.
- Partial evidence
- Its own public description names part of government custom software development companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name government custom software development companies. 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 794 government custom software development companies based in the United States
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Government custom software development companies based in the United States at a glance
As of Sep 27, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 794 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 government custom software development companies, 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 custom software development companies”. 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 custom software development companies), 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 custom software development companies, 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, 10,493 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.
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 custom software development companies, 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 custom software development companies are there based in the United States?
RevenueBase identified 794 government custom software development companies 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?
Tyler Technologies, headquartered in Plano, tops this list with the largest team on record.
Which city has the most government custom software development companies?
New York leads with 18 headquartered companies, followed by Washington (13) and Austin (11).
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 10,493 verified decision-maker contacts tracked across these 794 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.
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