Company lists · Data refreshed September 2026
Top 25 Custom software services based in Irvine, United States
RevenueBase identified 67 custom software services headquartered in Irvine, United States as of September 2026 and tracks 1,674 professional contacts across them, including 437 with verified work emails. New York is the largest hub.
This list covers custom software services headquartered in Irvine, 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 24, 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 custom software services based in Irvine, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 24, 2026Thanks. The Data Team will review it. | |||||
| 2 | 318 contacts → | ||||
Partial evidence “Foothill Technology Solutions is a Software development company.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 3 | 118 contacts → | ||||
Partial evidence “At Prophecy Technologies, we specialize in providing advanced software solutions that help organizations harness new opportunities and drive sustained growth.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 4 | 111 contacts → | ||||
Partial evidence “Datanetiix is a One-Stop-Solutions provider for your software development, business analytics & IT needs.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 5 | 78 contacts → | ||||
Indirect evidence “DNA Micro is a technology solutions company with over 22+ years of history developing medium to large scale solutions in various industries.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 6 | 51 contacts → | ||||
Strong evidence “First American Software Solutions Group provides custom software solutions for the real estate and financial services industries, including application and database development…” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 7 | 49 contacts → | ||||
Indirect evidence “Elegant solutions solve the problem in the simplest and most effective manner.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 8 | 41 contacts → | ||||
Indirect evidence “InfoSwift Corp is a trusted technology partner with over 15 years of experience delivering innovative IT solutions to clients across the United States.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 9 | 36 contacts → | ||||
Strong evidence “Connex Info Systems is a global IT services company specialized in developing custom software applications and providing consulting services around the world.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 10 | 31 contacts → | ||||
Partial evidence “Virstack helps businesses automate operations, improve customer experiences, and bring innovative digital products to market faster and cost-effectively.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 11 | 23 contacts → | ||||
Partial evidence “We build enterprise softwares for you.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 12 | 21 contacts → | ||||
Indirect evidence “Welcome to Company A.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 13 | 20 contacts → | ||||
Indirect evidence “Kingsmen Digital Ventures is a next generation development partner.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 14 | 18 contacts → | ||||
Indirect evidence “Give your business an advantage no one else has.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 15 | 16 contacts → | ||||
Indirect evidence “Allied Consultants is a technology consulting firm specializing in Enterprise Application Integration, Business Intelligence, Web 2.0 and Mobile Development.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 16 | 14 contacts → | ||||
Indirect evidence “Baytech is a team of developers, architects and project managers with a singular focus.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 17 | 12 contacts → | ||||
Strong evidence “Spectrum e-Commerce Solutions helps you grow your business through custom software solutions tailored to your needs.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 18 | 11 contacts → | ||||
Indirect evidence “VantaSoft builds and operates managed AI workforces for real business roles and workflows.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 19 | 10 contacts → | ||||
Partial evidence “Our global team strategies, designs, and builds software, which means you don’t need multiple agencies for one project.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 20 | 10 contacts → | ||||
Partial evidence “zC is a premier software development and consulting firm that delivers cutting-edge enterprise applications tailored to the unique needs of mortgage banks and private colleges…” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 21 | 9 contacts → | ||||
Partial evidence “We are a dynamic and forward-thinking software consulting business committed to driving digital transformation for our clients.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 22 | 9 contacts → | ||||
Partial evidence “Entrust Software Development, also known as ESDI Software Development US, is a global development company with offices in the United States and India.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 23 | 9 contacts → | ||||
Strong evidence “Custom Software Solutions helps clients create the ideal customer experience, across the entire customer journey.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 24 | 6 contacts → | ||||
Strong evidence “Irvine Software Company is a custom software development and technology consulting firm serving SMBs, mid-market companies, and Fortune 500 organizations.” Source: RevenueBase Database · checked Sep 24, 2026Thanks. The Data Team will review it. | |||||
| 25 | 6 contacts → | ||||
Indirect evidence “SpringShine Consulting offers the best-in-the-class technology services to small and medium businesses across the world.” Source: RevenueBase Database · checked Sep 24, 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: custom software services. 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 custom software services.
- Partial evidence
- Its own public description names part of custom software services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name custom software services. 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 67 custom software services based in Irvine, United States
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Custom software services based in Irvine, United States at a glance
As of Sep 24, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Irvine, so it is reported there. Company counts and contact totals on this page are exact for Irvine, over 67 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 custom software services, 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 Irvine, United States whose own description of what they do matches “custom software services”. 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 custom software services), 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 custom software services, and records with no verified work email. Companies headquartered outside Irvine 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, 437 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 24, 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.
Custom software services by metro in the United States
- Custom software services in New York401
- Custom software services in Austin265
- Custom software services in Houston185
- Custom software services in Los Angeles160
- Custom software services in Chicago157
- Custom software services in Miami157
- Custom software services in Sheridan156
- Custom software services in Dallas139
- Custom software services in San Francisco135
- Custom software services in Atlanta118
- Custom software services in San Diego90
- Custom software services in Denver74
- Custom software services in Orlando73
- Custom software services in Tampa68
- Custom software services in Wilmington68
- Custom software services in Boston67
- Custom software services in Irvine67
- Custom software services in Dover62
- Custom software services in Portland60
- Custom software services in San Jose52
- Custom software services in Seattle52
- Custom software services in Irving51
- Custom software services in Plano47
- Custom software services in Phoenix46
- Custom software services in Las Vegas44
- Custom software services in Alpharetta43
- Custom software services in Frisco41
- Custom software services in Minneapolis41
- Custom software services in Washington41
- Custom software services in Columbus40
- Custom software services in Charlotte39
- Custom software services in Richmond36
- Custom software services in San Antonio34
- Custom software services in Cheyenne33
- Custom software services in Newark33
- Custom software services in Fort Lauderdale32
- Custom software services in Jacksonville32
- Custom software services in Philadelphia32
- Custom software services in Raleigh32
- Custom software services in Columbia30
- Custom software services in St Petersburg30
- Custom software services in Arlington29
- Custom software services in Lewes29
- Custom software services in Nashville29
- Custom software services in Sacramento28
- Custom software services in Santa Clara28
- Custom software services in Scottsdale28
- Custom software services in Albuquerque27
- Custom software services in Cincinnati27
- Custom software services in Indianapolis27
- Custom software services in Bellevue26
- Custom software services in Boulder26
- Custom software services in Fremont26
- Custom software services in Salt Lake City26
- Custom software services in Cleveland25
- Custom software services in New York City25
- Custom software services in Sunnyvale25
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 custom software services, 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 custom software services are there based in Irvine, United States?
RevenueBase identified 67 custom software services headquartered in Irvine, 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?
Sigma Infosolutions LTD, headquartered in Irvine, tops this list with the largest team on record.
Which city has the most custom software services?
New York leads with 401 headquartered companies, followed by Austin (265) and Houston (185).
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 437 verified decision-maker contacts tracked across these 67 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 24, 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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