Company lists · Data refreshed September 2026

Top 25 Software engineering firms based in Herndon, United States

Name: Software engineering 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 6, 2026 176 companies tracked

RevenueBase identified 176 software engineering firms headquartered in Herndon, United States as of September 2026 and tracks 5,687 professional contacts across them, including 1,567 with verified work emails. New York is the largest hub.

This list covers software engineering 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 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

176Companies

5,687Contacts tracked

1,567Verified emails

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

Ranked by team size

Top 25 of 176 software engineering firms based in Herndon, 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	Idexcel	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	501-1,000	870 contacts →
	“Idexcel is a Professional Services and Technology Solutions provider specializing in Cloud Services, Cloud Native Services, Data Platforms and Intelligence, Automation & AI.” Source: company website · checked Sep 6, 2026
2	LTS	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	356 contacts →
	“From disaster response and automated healthcare kiosks to occupational health services and federal IT consulting, we operate at the intersection of mission-critical need and…” Source: company website · checked Sep 6, 2026
3	Softility, INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	201-500	321 contacts →
	“Softility is a digital transformation technology services company, specializing in innovative solutions across cloud adoption and modernization, data engineering and analytics…” Source: company website · checked Sep 6, 2026
4	TD Synnex Public Sector	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	201-500	292 contacts →
	“For more than 30 years, TD SYNNEX Public Sector has been dedicated to accelerating public sector growth for technology companies.” Source: company website · checked Sep 6, 2026
5	Karsun Solutions	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	201-500	282 contacts →
	“Karsun Solutions is a fast-growing, innovative, enterprise modernization firm.” Source: company website · checked Sep 6, 2026
6	Viitorcloud Technologies	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	201-500	239 contacts →
	“Empowering businesses to become future-ready, today!” Source: company website · checked Sep 6, 2026
7	Procentrix	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	201-500	235 contacts →
	“Procentrix delivers modern IT solutions for federal, civilian, and defense agencies, as well as state and local governments.” Source: company website · checked Sep 6, 2026
8	Pcm-G	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	1,001-5,000	176 contacts →
	“PCM-G is a division of Insight Enterprises, Inc.\| Together, we’ll help you navigate complex IT challenges.” Source: company website · checked Sep 6, 2026
9	Idea Entity	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	145 contacts →
	“Idea Entity makes ideas real through the application of technology.” Source: company website · checked Sep 6, 2026
10	Vista Applied Solutions Group INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	201-500	131 contacts →
	“VASG Inc has a strong reputation as a business and information technology consulting company.” Source: company website · checked Sep 6, 2026
11	Attainx, INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	125 contacts →
	“AttainX is an SBA certified 8a / EDWOSB / WOSB and CMMI L3, ISO 9001:201, QMS certified company that delivers information technology solutions to Federal and state agencies.” Source: company website · checked Sep 6, 2026
12	Everestek	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	122 contacts →
	“Everestek is a modern technology services & solutions company where our goal is to help clients with their technology needs.” Source: company website · checked Sep 6, 2026
13	Nextpoint Group	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	201-500	119 contacts →
	“NextPoint Group is a mission enablement, technology focused and culture rich IT professional service provider.” Source: company website · checked Sep 6, 2026
14	Eksource Technologies, INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	94 contacts →
	“Founded in 2008, ekSource Technologies is committed to providing value through the effective use of technology.” Source: company website · checked Sep 6, 2026
15	SSA Tech INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	201-500	70 contacts →
	“SSA Tech Inc is an IT Technical consulting solutions and services provider with proven expertise across various technologies.” Source: company website · checked Sep 6, 2026
16	Akima Global Technology	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	68 contacts →
	“Akima Global Technology is a technology solutions, program management and support company that collaborates with technology partners and the Federal Government to deliver IT…” Source: company website · checked Sep 6, 2026
17	Qvine Corporation	Partial evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	61 contacts →
	“QVine is a leading provider of Agile software development, cloud computing, big data, and other Information Technology (IT) services in the National Security and Defense sectors.” Source: company website · checked Sep 6, 2026
18	Allwyn Corporation	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	52 contacts →
	“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: company website · checked Sep 6, 2026
19	Niha Technologies INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	11-50	50 contacts →
	Source: company website · checked Sep 6, 2026
20	Geneva Software, INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	48 contacts →
	“Geneva Software, Inc, is a small business with over 25 years of exceptional past performance in federal agencies and the private sector.” Source: company website · checked Sep 6, 2026
21	Solution Street	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	47 contacts →
	“We are a passionate team of builders and problem solvers!” Source: company website · checked Sep 6, 2026
22	Salem Infotech	Strong evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	47 contacts →
	“Salem Infotech is a leading global product engineering company delivering strategic solutions using integrated technology stack in Software as-a-Service (SaaS) model, Global…” Source: company website · checked Sep 6, 2026
23	Etelligent Group	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	46 contacts →
	“15+ Years of Trusted IT Solutions for Federal Agencies- Data Security & Management: Safeguarding sensitive information with scalable, reliable solutions - Scalable Identity…” Source: company website · checked Sep 6, 2026
24	Cliff Services INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	46 contacts →
	“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: company website · checked Sep 6, 2026
25	Infoserv LLC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 6, 2026	51-200	44 contacts →
	“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: 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 176 software engineering firms based in Herndon, United States

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

As of Sep 6, 2026

27.6%Verified-email coverage

32.3Average contacts per company

11-50Median size (employees)

605.1%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 Herndon, over 176 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 Herndon, 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 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, 1,567 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 Herndon, United States?

RevenueBase identified 176 software engineering 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?

Idexcel, headquartered in Herndon, 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 1,567 verified decision-maker contacts tracked across these 176 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.