Company lists · Data refreshed September 2026

Top 25 Custom software development startups based in the United States

Name: Custom software development startups based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 12,762 companies tracked

RevenueBase identified 12,762 company matches for custom software development startups associated with the United States as of September 2026 and tracks 260,787 professional contacts across them, including 67,146 with verified work emails and 35,824 with mobile numbers. New York is the largest hub.

This list covers company matches for custom software development startups associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 29, 2026 How this list was built

12,762Companies

260,787Contacts tracked

67,146Verified emails

35,824Mobile numbers

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The 25 largest custom software development startups based in the United States

Ranked by team size

Top 25 of 12,762 company matches for custom software development startups based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	CDW	Exact match	Vernon Hills, IL, United StatesHQ recorded Sep 29, 2026	10001+	13,155 contacts →
	Exact match “At CDW, we know how to make technology work so people can do great things.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	R Systems	Exact match	El Dorado Hills, CA, United StatesHQ recorded Sep 29, 2026	5,001-10,000	7,360 contacts →
	Exact match “RSI is a trusted software engineering and digital transformation services partner to global enterprises navigating technological change.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	Epicor	Exact match	Austin, TX, United StatesHQ recorded Sep 29, 2026	1,001-5,000	5,802 contacts →
	Exact match “We’re here for the hard-working businesses that keep the world turning.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	Dataart	Exact match	New York, NY, United StatesHQ recorded Sep 29, 2026	5,001-10,000	5,249 contacts →
	Exact match “DataArt is a global software engineering firm that delivers breakthrough data, analytics, and AI platforms for the world’s most demanding organizations.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Iris Software INC	Exact match	Edison, NJ, United StatesHQ recorded Sep 29, 2026	1,001-5,000	3,421 contacts →
	Exact match “Iris Software has been a trusted software engineering partner to several Fortune 500 companies for over three decades.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	Chetu, INC	Exact match	Sunrise, FL, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,943 contacts →
	Exact match “Chetu is your seamless backend technology partner, helping startups, SMBs, and Fortune companies accelerate development of desktop, mobile, and web apps with on-demand developers…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	Exadel	Exact match	Walnut Creek, CA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,874 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	Itransition Group	Exact match	Decatur, GA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,664 contacts →
	Exact match “Founded in 1998, Itransition is a global software engineering and IT consulting company with engineers supporting clients across 40 countries.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	Mobile Programming	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,462 contacts →
	Exact match “Mobile Programming LLC was started with the mission to provide “Economic as well as Efficient” software solutions.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	Pragma	Exact match	Miami, FL, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,416 contacts →
	Exact match “Pragma is a Custom Software Development and Digital Transformation company founded 30 years ago to improve people's lives by transforming businesses.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	ICC	Exact match	Columbus, OH, United StatesHQ recorded Sep 29, 2026	501-1,000	1,416 contacts →
	Exact match “User First.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	Trigent Software INC	Exact match	Southborough, MA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,379 contacts →
	Exact match “Trigent is a global leader in software solutions, headquartered in Southborough, MA, with development centers in Boston, Bangalore.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	V Group INC	Exact match	Cranbury, NJ, United StatesHQ recorded Sep 29, 2026	n/a	1,347 contacts →
	Exact match “Since V Group Inc.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	Relevantz	Exact match	Alpharetta, GA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,164 contacts →
	Exact match “We are in the business of custom software engineering.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	In Time TEC	Exact match	Meridian, ID, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,139 contacts →
	Exact match “In Time Tec is a platform dedicated to Creating Abundance.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	Coherent Solutions	Exact match	St Louis Park, MN, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,066 contacts →
	Exact match “Coherent Solutions is a leading global digital engineering company headquartered in Minneapolis, Minnesota, with over 1700+ software engineers and designers in 9 countries.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Brain Station 23	Exact match	Springfield, VA, United StatesHQ recorded Sep 29, 2026	501-1,000	1,053 contacts →
	Exact match “Brain Station 23 is at the forefront of global digital transformation, delivering state-of-the-art technology solutions designed to propel businesses into the future.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	dev.pro	Exact match	Charlotte, NC, United StatesHQ recorded Sep 29, 2026	501-1,000	997 contacts →
	Exact match “Dev.Pro helps innovative technology companies scale their business by leveraging our software engineering expertise to support them every step of the way.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Avasoft	Exact match	Blue Bell, PA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	977 contacts →
	Exact match “AVASOFT is a leading digital transformation strategy company that offers clients a holistic, product-centric approach to digital transformation by combining strategic planning…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	Cyber Infrastructure CIS	Exact match	San Jose, CA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	921 contacts →
	Exact match “Think Big.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	CDW G	Exact match	Vernon Hills, United StatesHQ recorded Sep 29, 2026	5,001-10,000	914 contacts →
	Exact match “At CDW, our experts partner with you to build IT solutions that don’t just solve problems – they create opportunities.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	Trinetix	Exact match	Brentwood, TN, United StatesHQ recorded Sep 29, 2026	1,001-5,000	902 contacts →
	Exact match “Trinetix is a global custom software development partner that brings ambitious ideas to life.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	Unosquare	Exact match	Lake Oswego, OR, United StatesHQ recorded Sep 29, 2026	1,001-5,000	895 contacts →
	Exact match “is a full-cycle digital engineering company that provides solutions to growing companies in regulated and data intensive industries.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Folio3 Software	Exact match	San Mateo, CA, United StatesHQ recorded Sep 29, 2026	501-1,000	846 contacts →
	Exact match “Folio3 is a California based software development company that helps entrepreneurs and large corporations build innovative, world class software solutions by providing offshore…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	Tanisha Systems, INC	Exact match	Boston, MA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	844 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “custom software development startups”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 12,762 custom software development startups based in the United States

See the full list, filter by size, metro and specialty, and access 67,146 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Custom software development startups based in the United States at a glance

As of Sep 29, 2026

25.7%Verified-email coverage

13.7%Mobile-number coverage

20.4Average contacts per company

11-50Median size (employees)

4.7%Largest-city concentration · New York

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

5,762

11-50

4,444

51-200

1,916

201-500

416

501-1,000

124

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 32.0d

28,1990–30

35,62431–60

2,22461–90

5490–180

1,045180+

Company record updated

Median 92.0d

00–30

33,32331–60

86,34761–90

125,47590–180

15,642180+

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “custom software development startups” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 67,146 professional contacts with verified work emails across the full matched dataset. 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 29, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Custom software development startups by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “custom software development startups”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many custom software development startups are there based in the United States?

RevenueBase identified 12,762 company matches for custom software development startups associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

CDW tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most custom software development startups?

New York leads with 603 company records, followed by Austin (351) and Houston (252).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 67,146 professional contacts with verified work emails tracked across these 12,762 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 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 SmartSearch, 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.