Company lists · Data refreshed September 2026

Top 24 Software engineering firms based in Gaithersburg, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 46 companies tracked

RevenueBase identified 46 software engineering firms headquartered in Gaithersburg, United States as of September 2026 and tracks 485 professional contacts across them, including 92 with verified work emails. New York is the largest hub.

This list covers software engineering firms headquartered in Gaithersburg, 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

46Companies

485Contacts tracked

92Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 24 largest software engineering firms based in Gaithersburg, United States

Ranked by team size

Top 24 of 46 software engineering firms based in Gaithersburg, 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	Diaconia	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	51-200	83 contacts →
	“Service starts with a spark: one that illuminates breakthroughs and leaves a lasting impact.” Source: company website · checked Sep 6, 2026
2	Oss, INC	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	51-200	54 contacts →
	“OSS, Inc is a company with foundations based on a full information technology support to clients.” Source: company website · checked Sep 6, 2026
3	Intervise	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	51-200	37 contacts →
	“Intervise is a leading IT services organization with more than 27 years of experience providing solutions for our government and commercial customers in the areas of Custom…” Source: company website · checked Sep 6, 2026
4	Previse Solutions	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	51-200	34 contacts →
	“At Previse, we offer a range of IT services from business solutions to implementation with a core set of expertise.” Source: company website · checked Sep 6, 2026
5	ARK Infotech LLC	Partial evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	11-50	30 contacts →
	“Innovate, Implement, Transform - Your Trusted Partner in Cloud and Software Innovation Unlock the power of cutting-edge technology with Ark, your go-to Amazon AWS certified…” Source: company website · checked Sep 6, 2026
6	Quantum Vision	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	51-200	29 contacts →
	“Quantum Vision provides quality, business-aligned technology solutions to help our clients grow and prosper in an ever-evolving marketplace.” Source: company website · checked Sep 6, 2026
7	Cobb Systems Group, LLC	Strong evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	11-50	18 contacts →
	“Cobb Systems Group, LLC is a technology-based, minority-owned product and solutions firm that delivers business strategy and technology consultation, software engineering…” Source: company website · checked Sep 6, 2026
8	Scrolltab	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	n/a	15 contacts →
	“ScrollTab is a Leading provider of Information Technology services, consulting and business solutions that believes in providing the industry focused services and solutions to…” Source: company website · checked Sep 6, 2026
9	Network Specialty Group, INC	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	51-200	14 contacts →
	“Our team at NSG thinks differently.” Source: company website · checked Sep 6, 2026
10	Washington Software INC	Partial evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	11-50	14 contacts →
	“Founded in 1998, Washington Software's commitment to success has been the vision since the beginning.” Source: company website · checked Sep 6, 2026
11	Cyber Infotech LLC	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	11-50	13 contacts →
	“Cyber Infotech, LLC is a full-fledged IT Solutions & Services provider focusing on Application Development, Data Management, Cloud Computing, Big Data Analytics providing…” Source: company website · checked Sep 6, 2026
12	D2soft Intelligence	Strong evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	11-50	12 contacts →
	“D2Soft Intelligence, LLC is a technology consulting and engineering firm specializing in Enterprise IT, Software Engineering, Cloud Architecture, DevSecOps, and AI-driven…” Source: company website · checked Sep 6, 2026
13	Elegant Technical Solutions INC	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	11-50	9 contacts →
	Source: company website · checked Sep 6, 2026
14	Client Software Services CSS	Partial evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	11-50	9 contacts →
	“Provides a comprehensive range of technology solutions, including Software Application Development, Data and Systems Integration, Data Modeling, Business Intelligence, and Data…” Source: company website · checked Sep 6, 2026
15	WEB Traits, INC	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	51-200	8 contacts →
	Source: company website · checked Sep 6, 2026
16	Fides Fides Info SYS	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	11-50	6 contacts →
	“FIDES is a technology consulting and managed services firm specializing in digital transformation and data analytics with a primary focus on the healthcare industry.” Source: company website · checked Sep 6, 2026
17	Sentilect, LLC	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	1-10	5 contacts →
	“Sentilect, LLC is a consulting firm, which provides a wide range of IT services to government and non-government organizations in the Greater Washington DC area.” Source: company website · checked Sep 6, 2026
18	Acro Systems INC	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	11-50	5 contacts →
	“We are an IT company with expertise in Cloud Migration & Modernization, Application Development, Mobile Application Development, Cyber Security, Project Management, Consulting and…” Source: company website · checked Sep 6, 2026
19	Motion Forward Technologies	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	1-10	4 contacts →
	“Motion Forward Technologies is a cutting-edge technology firm specializing in comprehensive IT solutions for the Federal government.” Source: company website · checked Sep 6, 2026
20	Technology Transition Paradigm, LLC	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	1-10	3 contacts →
	“ITechnology Transition Paradigm offers a different approach to IT services-one that adapts to your business needs, ensuring you get the right solution, the right provider, and the…” Source: company website · checked Sep 6, 2026
21	Cognostrategy, LLC	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	1-10	2 contacts →
	“At CognoStrategy, we forge the future of technology through strategic consulting, robust information technology infrastructure services, cutting-edge artificial intelligence &…” Source: company website · checked Sep 6, 2026
22	Meridian Solutions Group, INC	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	1-10	2 contacts →
	“Meridian Solutions Group is an 8(a) Certified, Small Disadvantaged Business (SDB) that provides Information Technology consulting solutions to government, commercial and small…” Source: company website · checked Sep 6, 2026
23	Strategic Technical Services	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	1-10	2 contacts →
	“STS is a technology services firm providing clients with high-quality technology solutions that help companies grow by aligning IT with business.” Source: company website · checked Sep 6, 2026
24	Envirosys Technologies	Indirect evidence	Gaithersburg, MD, United StatesHQ checked Sep 6, 2026	1-10	1 contacts →
	“We strive to deliver quality services to our clients and attain mission goals by solving complex business problems at the right cost.” 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 24 of 46 software engineering firms based in Gaithersburg, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 92 reachable decision-makers.

Free signup · no credit card

View the full list →

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

As of Sep 6, 2026

19.0%Verified-email coverage

10.5Average contacts per company

11-50Median size (employees)

2315.2%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

10001+

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 Gaithersburg, over 46 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 Gaithersburg, 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 Gaithersburg 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, 92 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 Gaithersburg, United States?

RevenueBase identified 46 software engineering firms headquartered in Gaithersburg, 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?

Diaconia, headquartered in Gaithersburg, 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 92 verified decision-maker contacts tracked across these 46 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.

Ready to reach these companies? Verified emails and direct dials for all 46 software engineering firms based in Gaithersburg, United States. Start with a free account, no credit card.

Download this list →

Related lists

Software engineering firms by geography

Browse the directory

Browse: Companies home · Software engineering firms in United States · All United States lists · All Software engineering firms lists · New lists

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.