Company lists · Data refreshed September 2026

Top 25 App modernization companies based in the United States

Name: App modernization companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,294 companies tracked

RevenueBase identified 1,294 app modernization companies headquartered in the United States as of September 2026 and tracks 40,197 professional contacts across them, including 10,972 with verified work emails. New York is the largest hub.

This list covers app modernization 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 19, 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 19, 2026 86% judged on-target in blind review

1,294Companies

40,197Contacts tracked

10,972Verified emails

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The 25 largest app modernization companies based in the United States

Ranked by team size

Top 25 of 1,294 app modernization companies based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to app modernization companies: 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	R Systems	Indirect evidence	El Dorado Hills, CA, United StatesHQ checked Sep 19, 2026	5,001-10,000	7,360 contacts →
	Indirect evidence “RSI is a trusted software engineering and digital transformation services partner to global enterprises navigating technological change.” Source: RevenueBase Database · checked Sep 19, 2026
2	Exadel	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,874 contacts →
	Indirect evidence “Exadel is a leading global software consulting and development company that looks beyond the code to maximize the technology-driven business impact our partners want to make.” Source: RevenueBase Database · checked Sep 19, 2026
3	Itransition Group	Indirect evidence	Decatur, GA, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,664 contacts →
	Indirect evidence “Founded in 1998, Itransition is a global software engineering and IT consulting company with engineers supporting clients across 40 countries.” Source: RevenueBase Database · checked Sep 19, 2026
4	Improving	Indirect evidence	Plano, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,578 contacts →
	Indirect evidence “Improving is a leading IT professional services firm committed to helping companies achieve lasting success through modern technology.” Source: RevenueBase Database · checked Sep 19, 2026
5	Royal Cyber INC	Indirect evidence	Naperville, IL, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,325 contacts →
	Indirect evidence “Royal Cyber is a trusted global IT consulting & digital transformation partner, empowering enterprises for over two decades to evolve with agility, security, and innovation.” Source: RevenueBase Database · checked Sep 19, 2026
6	Tanisha Systems, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 19, 2026	1,001-5,000	844 contacts →
	Indirect evidence “Tanisha Systems, founded in 2002 in Massachusetts-USA, is a leading provider of Custom Application Development and end-to-end IT Services to clients globally.” Source: RevenueBase Database · checked Sep 19, 2026
7	Daffodil Software	Indirect evidence	Grandville, MI, United StatesHQ checked Sep 19, 2026	501-1,000	727 contacts →
	Indirect evidence “Daffodil Software is a leading software engineering partner that’s empowering 100+ organizations across the globe with innovative solutions, unparalleled execution capabilities…” Source: RevenueBase Database · checked Sep 19, 2026
8	Droisys	Indirect evidence	Las Vegas, NV, United StatesHQ checked Sep 19, 2026	201-500	544 contacts →
	Indirect evidence “Droisys is an innovation technology company, with a reputation of delivering top engineering projects and teams to meet, execute, and solve complex business challenges & deliver…” Source: RevenueBase Database · checked Sep 19, 2026
9	STG	Indirect evidence	Salt Lake City, UT, United StatesHQ checked Sep 19, 2026	51-200	508 contacts →
	Indirect evidence “Your Business Technology Partner.” Source: RevenueBase Database · checked Sep 19, 2026
10	Growth Acceleration Partners	Indirect evidence	Austin, TX, United StatesHQ checked Sep 19, 2026	501-1,000	507 contacts →
	Indirect evidence “Growth Acceleration Partners is a consulting and technology services company.” Source: RevenueBase Database · checked Sep 19, 2026
11	Zoolatech	Indirect evidence	Miami, FL, United StatesHQ checked Sep 19, 2026	501-1,000	468 contacts →
	Indirect evidence “Zoolatech is a global software engineering partner helping enterprises modernize legacy systems, adopt AI, and build scalable digital platforms.” Source: RevenueBase Database · checked Sep 19, 2026
12	Sigma Infosolutions LTD	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	201-500	454 contacts →
	Indirect evidence “Sigma Infosolutions is a prominent provider of technology solutions and services globally, with our headquarters in Irvine, USA, and global offices in Australia & India.” Source: RevenueBase Database · checked Sep 19, 2026
13	Softweb Solutions Inc.	Indirect evidence	Plano, TX, United StatesHQ checked Sep 19, 2026	501-1,000	430 contacts →
	Indirect evidence “When we look at the way enterprises operate today, we see a fundamental challenge.” Source: RevenueBase Database · checked Sep 19, 2026
14	Lohika	Indirect evidence	San Mateo, CA, United StatesHQ checked Sep 19, 2026	501-1,000	422 contacts →
	Indirect evidence “Lohika is now part of Capgemini.” Source: RevenueBase Database · checked Sep 19, 2026
15	Viva USA INC	Indirect evidence	Rolling Meadows, IL, United StatesHQ checked Sep 19, 2026	501-1,000	385 contacts →
	Indirect evidence “VIVA USA Inc.(VIVA), certified Woman and Minority Owned, is a Technology and IT consulting company based in the greater Chicago area.” Source: RevenueBase Database · checked Sep 19, 2026
16	United Techno	Indirect evidence	Pleasanton, CA, United StatesHQ checked Sep 19, 2026	201-500	372 contacts →
	Indirect evidence “At United Techno, we harness experience and collaboration to address customer challenges and devise intuitive solutions.” Source: RevenueBase Database · checked Sep 19, 2026
17	Sira Consulting, An INC 5000 Company	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	329 contacts →
	Indirect evidence “SiRA Consulting is a Certified MBE consulting company that was founded in 2012.” Source: RevenueBase Database · checked Sep 19, 2026
18	Primus Software Corporation	Indirect evidence	Duluth, GA, United StatesHQ checked Sep 19, 2026	201-500	303 contacts →
	Indirect evidence “Primus Software Corporation, a leading software services company with over 29 years of industry experience, is a trusted Business & Technology Partner for enterprises seeking to…” Source: RevenueBase Database · checked Sep 19, 2026
19	Xtracit, INC	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 19, 2026	51-200	300 contacts →
	Indirect evidence “XtracIT consulting services collaborate with clients and assist them understand how the technology integration into their businesses will enhance their business growth and ensure…” Source: RevenueBase Database · checked Sep 19, 2026
20	Valzo Soft Solutions	Indirect evidence	Alpharetta, GA, United StatesHQ checked Sep 19, 2026	1,001-5,000	286 contacts →
	Indirect evidence “ValzoSoft Solutions – Driving Innovation, Empowering Growth At ValzoSoft Solutions, we turn visionary ideas into transformative digital experiences.” Source: RevenueBase Database · checked Sep 19, 2026
21	Nalashaa Solutions	Indirect evidence	Edison, NJ, United StatesHQ checked Sep 19, 2026	201-500	278 contacts →
	Indirect evidence “At Nalashaa Solutions, we’re not just technologists; we’re your trusted partners in transformation.” Source: RevenueBase Database · checked Sep 19, 2026
22	Tridhya Tech Limited	Indirect evidence	Suwanee, GA, United StatesHQ checked Sep 19, 2026	501-1,000	277 contacts →
	Indirect evidence “We specialize in delivering enterprise-focused software and services designed to enhance the digital experience for your customers, employees, and partners.” Source: RevenueBase Database · checked Sep 19, 2026
23	Unified Infotech	Indirect evidence	NY, United StatesHQ checked Sep 19, 2026	201-500	251 contacts →
	Indirect evidence “Unified Infotech is an award winning digital transformation partner that was founded in 2010.” Source: RevenueBase Database · checked Sep 19, 2026
24	Alliance Global Services	Indirect evidence	Conshohocken, PA, United StatesHQ checked Sep 19, 2026	10001+	227 contacts →
	Indirect evidence “Alliance Global Services is a software development firm that partners with software, technology and information-intensive businesses on their mission critical work.” Source: RevenueBase Database · checked Sep 19, 2026
25	Radiant Digital	Indirect evidence	Vienna, VA, United StatesHQ checked Sep 19, 2026	201-500	226 contacts →
	Indirect evidence “Radiant Digital delivers solutions that help our clients become more agile, efficient, competitive, and innovative.” Source: RevenueBase Database · checked Sep 19, 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: app modernization 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 app modernization companies.
Partial evidence: Its own public description names part of app modernization companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name app modernization 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 1,294 app modernization companies based in the United States

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App modernization companies based in the United States at a glance

As of Sep 19, 2026

27.3%Verified-email coverage

31.1Average contacts per company

11-50Median size (employees)

4.3%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

562

11-50

426

51-200

233

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,294 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 app modernization 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 “app modernization 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 app modernization 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 app modernization 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, 10,972 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 19, 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.

App modernization companies by metro

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 app modernization 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 app modernization companies are there based in the United States?

RevenueBase identified 1,294 app modernization 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?

R Systems, headquartered in El Dorado Hills, tops this list with the largest team on record.

Which city has the most app modernization companies?

New York leads with 55 headquartered companies, followed by Austin (40) and Houston (27).

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 10,972 verified decision-maker contacts tracked across these 1,294 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 19, 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.