Company lists · Data refreshed September 2026

Top 25 IT services firms based in Irvine, United States

Name: IT services firms based in Irvine, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 135 companies tracked

RevenueBase identified 135 IT services firms headquartered in Irvine, United States as of September 2026 and tracks 4,550 professional contacts across them, including 912 with verified work emails. New York is the largest hub.

This list covers IT services firms 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 27, 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 27, 2026 86% judged on-target in blind review

135Companies

4,550Contacts tracked

912Verified emails

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The 25 largest IT services firms based in Irvine, United States

Ranked by team size

Top 25 of 135 IT services firms based in Irvine, United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to IT services 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	Hitachi Solutions America	Strong evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	501-1,000	570 contacts →
	Strong evidence “Hitachi Solutions is a global IT consulting and services firm.” Source: RevenueBase Database · checked Sep 27, 2026
2	Technologent	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	201-500	492 contacts →
	Indirect evidence “Technologent is a women-owned, WBENC-certified and global provider of Information Technology solutions and services for Fortune companies.” Source: RevenueBase Database · checked Sep 27, 2026
3	Altezzasys INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	485 contacts →
	Indirect evidence “AltezzaSys INC is a global technology services, staffing and outsourcing provider that is committed to helping customers align technology innovation with business strategy.” Source: RevenueBase Database · checked Sep 27, 2026
4	Sigma Infosolutions LTD	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 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 27, 2026
5	Xavor Corporation	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	51-200	263 contacts →
	Indirect evidence “Xavor has been a trusted technology partner to Fortune 500s, SMEs, and startups for over 3 decades.” Source: RevenueBase Database · checked Sep 27, 2026
6	Purple Drive Technologies	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	51-200	153 contacts →
	Indirect evidence “Purple Drive partners with leading global technology companies and system integrators to help customers achieve their business and technology goals.” Source: RevenueBase Database · checked Sep 27, 2026
7	Kore1	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	51-200	138 contacts →
	Indirect evidence “KORE1 is a nationwide provider of recruiting and staffing services for the Technology, Engineering, Accounting & Finance, Healthcare, and Digital & Creative Services industries.” Source: RevenueBase Database · checked Sep 27, 2026
8	Blytheco	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	51-200	133 contacts →
	Indirect evidence “For over 45 years, Blytheco has been the transformation partner of choice for over companies nationwide.” Source: RevenueBase Database · checked Sep 27, 2026
9	Ejamerica	Strong evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	501-1,000	132 contacts →
	Strong evidence “We provide Digital Application Services, Cyber Security Services, IT Consulting Services, Modern End-User Services, Data Center and Cloud Services and IT Staffing services.” Source: RevenueBase Database · checked Sep 27, 2026
10	O2 Technologies,inc	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	100 contacts →
	Indirect evidence “O2 Technology attracts imaginative citizens from all types of backgrounds, bringing together excitement and new dreams to meet challenges and appreciate their talent.” Source: RevenueBase Database · checked Sep 27, 2026
11	GDR Group, INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	51-200	91 contacts →
	Indirect evidence “Who is GDR?” Source: RevenueBase Database · checked Sep 27, 2026
12	West Coast Consulting	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	201-500	87 contacts →
	Indirect evidence “West Coast Consulting is a privately held boutique consulting firm formed in 1998, specializing in providing Information Technology solutions and Outsourcing services.” Source: RevenueBase Database · checked Sep 27, 2026
13	Indusa	Strong evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	501-1,000	81 contacts →
	Strong evidence “Synoptek (previously Indusa) is a global systems integrator and managed IT services provider, offering comprehensive IT management and consultancy services to organizations…” Source: RevenueBase Database · checked Sep 27, 2026
14	Intratek Computer INC	Strong evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	51-200	70 contacts →
	Strong evidence “Intratek is a premier provider of IT services, solutions and support.” Source: RevenueBase Database · checked Sep 27, 2026
15	Abotts Consulting INC	Strong evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	51-200	65 contacts →
	Strong evidence “ABOTTS is a consulting and staffing services company headquartered in Irvine, California, focused on meeting both IT and non-IT needs of our clients.” Source: RevenueBase Database · checked Sep 27, 2026
16	SMS Datacenter	Strong evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	51-200	51 contacts →
	Strong evidence “Founded in 1982, SMS is a leading provider of Managed Services, IT Strategy & Consulting, Software Development & Analytics, Private Managed Cloud, and Colocation Services.” Source: RevenueBase Database · checked Sep 27, 2026
17	Technijian IT Support	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	11-50	41 contacts →
	Indirect evidence “Two Decades of Technological Excellence: A Chronicle of Technijian's Evolution Celebrating 24 years in the business, Technijian has been a stalwart force in the ever-evolving…” Source: RevenueBase Database · checked Sep 27, 2026
18	Connex Info Systems, INC	Strong evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	51-200	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 27, 2026
19	LAN WAN Enterprise IT Solutions	Strong evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	11-50	21 contacts →
	Strong evidence “LAN WAN IT Solutions is the market-leading Managed IT Services and Solutions provider in Orange County.” Source: RevenueBase Database · checked Sep 27, 2026
20	Protelligent, INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	11-50	21 contacts →
	Indirect evidence “Protelligent wasn't built on tiers and transactions but on a duty to be better than the rest.” Source: RevenueBase Database · checked Sep 27, 2026
21	Network Hardwares	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	11-50	21 contacts →
	Indirect evidence “Network Hardwares is one of the leading multi-brand e-commerce providers of information technology solutions to customers of various sizes in the United States.” Source: RevenueBase Database · checked Sep 27, 2026
22	Innova Global Technology	Strong evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	501-1,000	19 contacts →
	Strong evidence “Most IT directors and professionals hate to find themselves stressed, trying to manage daunting & never ending deliverable.” Source: RevenueBase Database · checked Sep 27, 2026
23	Swifttech Solutions, INC	Strong evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	11-50	19 contacts →
	Strong evidence “SwiftTech Solutions works with Small, Medium, and Large size businesses to improve their technology services and bring them into a safe and trusted IT world.” Source: RevenueBase Database · checked Sep 27, 2026
24	Strikeworks	Strong evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	11-50	16 contacts →
	Strong evidence “Let’s face it: IT isn’t the most glamorous part of running a business, but it doesn’t have to be a constant headache either.” Source: RevenueBase Database · checked Sep 27, 2026
25	Flying Buttress	Strong evidence	Irvine, CA, United StatesHQ checked Sep 27, 2026	11-50	13 contacts →
	Strong evidence “Flying Buttress is the leading provider of IT solutions for the Architectural and Engineering & Design industries.” Source: RevenueBase Database · checked Sep 27, 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: IT services 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 IT services firms.
Partial evidence: Its own public description names part of IT services firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT services 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 135 IT services firms based in Irvine, United States

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IT services firms based in Irvine, United States at a glance

As of Sep 27, 2026

20.0%Verified-email coverage

33.7Average contacts per company

11-50Median size (employees)

511.9%Largest-city concentration · New York

Sep 27, 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 for Irvine, so it is reported there. Company counts and contact totals on this page are exact for Irvine, over 135 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 IT services 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 Irvine, United States whose own description of what they do matches “IT services 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 IT services 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 IT services firms, 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, 912 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 27, 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.

IT services 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 IT services 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 IT services firms are there based in Irvine, United States?

RevenueBase identified 135 IT services firms 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?

Hitachi Solutions America, headquartered in Irvine, tops this list with the largest team on record.

Which city has the most IT services firms?

New York leads with 691 headquartered companies, followed by Houston (469) and Dallas (340).

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 912 verified decision-maker contacts tracked across these 135 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 27, 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.