Company lists · Data refreshed September 2026
Top 25 Managed IT services accounting companies based in Irvine, United States
RevenueBase identified 46 managed IT services accounting companies headquartered in Irvine, United States as of September 2026 and tracks 382 professional contacts across them, including 146 with verified work emails. Across the United States, New York is the largest hub for this category (244 companies); Irvine has 46.
This list covers managed IT services accounting companies 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 28, 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 managed IT services accounting companies based in Irvine, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 29 contacts → | ||||
Strong evidence “KaufmanIT is an award-winning managed service provider from Irvine, specializing in IT solutions tailored to small to mid-sized businesses.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 29 contacts → | ||||
Strong evidence “TechHeights is an award-winning Managed Service Provider delivering enterprise-grade IT, cybersecurity, and cloud solutions to businesses across Orange County, Los Angeles, and…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 28 contacts → | ||||
Partial evidence “Protecting & Optimizing Orange County and Nationwide Businesses for 14+ Years IT and Cyber Support in Irvine, CA Next IT Solutions partners with organizations in delivering state…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 21 contacts → | ||||
Partial evidence “At Sagelight Accounting, we go beyond basic compliance.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 19 contacts → | ||||
Indirect evidence “Kumo is one of the fastest-growing Tech Solution Providers in Southern California.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 16 contacts → | ||||
Partial 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 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 15 contacts → | ||||
Strong evidence “At Atomic Technology Solutions, we provide organizations with reliable, enterprise-grade Managed IT services and Cybersecurity solutions that minimize risk and ensure operational…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 13 contacts → | ||||
Indirect evidence “Tailored Technology Services is an Information Technology company that strives to recognize the various needs of every client.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 13 contacts → | ||||
Partial evidence “Welcome to Cynexlink, your premier global IT and cybersecurity partner.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 10 contacts → | ||||
Strong evidence “CSP Networks is an award-winning IT Managed Service Provider (MSP), that combines strategic advisory, technical and cyber security expertise, and the ability to effectively…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 9 contacts → | ||||
Partial evidence “Basis 365® Accounting provides outsourced accounting, bookkeeping, and payroll services to ecommerce, tech, software and a wide range of professional service-based businesses.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 8 contacts → | ||||
Partial evidence “We Solve IT For You!” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 8 contacts → | ||||
Strong evidence “Contact us at (877) 287-9751 Managed IT Services - Providing cost protection and operational efficiencies through fixed fee, proactive maintenance and support services.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 8 contacts → | ||||
Partial evidence “At our company, we provide enterprises with cutting-edge, fully integrated IT solutions tailored to their specific needs.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 6 contacts → | ||||
Partial evidence “IT service provider serving small and mid size businesses since 1998.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 6 contacts → | ||||
Partial evidence “Integrated Computer Technologies, Inc.(ICT) is a professional, computer networking company delivering Premium Network Managed Services, Incidental Computer Network Support, and…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 6 contacts → | ||||
Strong evidence “Ayvant is a trusted Managed IT Services Provider catering to the technology needs of small and medium businesses across the US and Canada.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 5 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 5 contacts → | ||||
Strong evidence “Technology’s Edge provides a high level of IT Managed Security Services to businesses in the Greater LA & Orange County Area.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 4 contacts → | ||||
Partial evidence “Advantech IT Solutions, your trusted outsource partner for IT consulting, data protection, network support and maintenance.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 3 contacts → | ||||
Partial evidence “We help companies with Accounting Services, Controller / CFO, Bookkeeping Services and Financial Coaching.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2 contacts → | ||||
Indirect evidence “Vistem Solutions Inc.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2 contacts → | ||||
Strong evidence “IT Managed Service Provider, 20 Years of Experience in planning, implementing, maintaining, and troubleshooting IT infrastructure and computer networks.” Source: RevenueBase Database · checked Sep 28, 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: managed IT services accounting 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 managed IT services accounting companies.
- Partial evidence
- Its own public description names part of managed IT services accounting companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name managed IT services accounting 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 46 managed IT services accounting companies based in Irvine, United States
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Managed IT services accounting companies based in Irvine, United States at a glance
As of Sep 28, 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 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 managed IT services accounting 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 Irvine, United States whose own description of what they do matches “managed IT services accounting 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 managed IT services accounting 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 managed IT services accounting companies, 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, 146 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 28, 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.
Managed IT services accounting companies by metro in the United States
- Managed IT services accounting companies in New York244
- Managed IT services accounting companies in Houston156
- Managed IT services accounting companies in Miami102
- Managed IT services accounting companies in Chicago97
- Managed IT services accounting companies in Austin94
- Managed IT services accounting companies in Atlanta87
- Managed IT services accounting companies in Dallas84
- Managed IT services accounting companies in Los Angeles79
- Managed IT services accounting companies in San Diego76
- Managed IT services accounting companies in Tampa66
- Managed IT services accounting companies in Denver59
- Managed IT services accounting companies in Charlotte56
- Managed IT services accounting companies in Phoenix56
- Managed IT services accounting companies in Las Vegas54
- Managed IT services accounting companies in San Francisco52
- Managed IT services accounting companies in Washington47
- Managed IT services accounting companies in San Antonio46
- Managed IT services accounting companies in Seattle41
- Managed IT services accounting companies in Orlando39
- Managed IT services accounting companies in Portland39
- Managed IT services accounting companies in Jacksonville33
- Managed IT services accounting companies in Indianapolis31
- Managed IT services accounting companies in San Jose31
- Managed IT services accounting companies in Richmond30
- Managed IT services accounting companies in Fort Lauderdale29
- Managed IT services accounting companies in Louisville29
- Managed IT services accounting companies in Wilmington28
- Managed IT services accounting companies in Columbus27
- Managed IT services accounting companies in Frisco27
- Managed IT services accounting companies in Raleigh26
- Managed IT services accounting companies in Cincinnati25
- Managed IT services accounting companies in Tucson25
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 managed IT services accounting 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 managed IT services accounting companies are there based in Irvine, United States?
RevenueBase identified 46 managed IT services accounting companies 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?
Kaufmanit, INC, headquartered in Irvine, tops this list with the largest team on record.
Which city in the United States has the most managed IT services accounting companies?
New York leads the United States with 244 headquartered companies, followed by Houston (156) and Miami (102). Irvine has 46.
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 146 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 28, 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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