Company lists · Data refreshed September 2026
Top 25 Tier 1 IT companies based in the United States
RevenueBase identified 717 tier 1 IT companies headquartered in the United States as of September 2026 and tracks 783,066 professional contacts across them, including 172,754 with verified work emails. New York is the largest hub.
This list covers tier 1 IT 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 21, 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 tier 1 IT companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 327,607 contacts → | ||||
Indirect evidence “At IBM, we do more than work.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 82,768 contacts → | ||||
Partial evidence “DXC Technology helps global companies run their mission-critical systems and operations while modernizing IT, optimizing data architectures, and ensuring security and scalability…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 35,232 contacts → | ||||
Indirect evidence “Lenovo is a US$83 billion revenue global technology powerhouse, ranked #196 in the Fortune Global 500, and serving millions of customers every day in 180 markets.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 22,390 contacts → | ||||
Indirect evidence “NTT DATA, Inc.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 18,676 contacts → | ||||
Indirect evidence “Unisys is a global technology solutions company that powers breakthroughs for the world’s leading organizations.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 12,231 contacts → | ||||
Indirect evidence “Everforth Apex Systems, part of the Everforth ™ Network, is a leading global technology services company specializing in customizable industry-specific solutions that turns…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 3,051 contacts → | ||||
Partial evidence “MOURI Tech - the global enterprise IT services provider, established in 2005, has been offering innovative solutions underscoring client success, with unwavering commitment.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 2,714 contacts → | ||||
Partial evidence “Miracle Software Systems is a global IT services company that has been consistently delivering true value for businesses for the past 29 years.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 2,359 contacts → | ||||
Partial evidence “Beyondsoft Consulting is a leading global mid-sized business IT and consulting company that combines modern technologies and proven methodologies to tailor solutions that move…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 2,215 contacts → | ||||
Partial evidence “Astreya is the leading IT solutions provider for some of the world's most recognizable and innovative organizations.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1,950 contacts → | ||||
Partial evidence “IT Convergence is a global Oracle Platinum Partner with a comprehensive service offering across all three pillars of the Cloud (IaaS, PaaS, SaaS), including Consulting/Advisory…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 1,864 contacts → | ||||
Indirect evidence “Founded in 2005, GyanSys is a leading global system integrator company supporting enterprise customers worldwide.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1,664 contacts → | ||||
Partial evidence “Quadrant Technologies: Your Go-to IT Services Partner for a Digital Future For over a decade, Quadrant Technologies has established itself as a trailblazer in the IT services…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 1,398 contacts → | ||||
Indirect evidence “Established in California in 1993, OSI Digital has grown into a truly global business and technology solutions provider, committed to helping organizations transform, perform and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 1,216 contacts → | ||||
Indirect evidence “At Netlink, we combine human innovation with AI-driven intelligence to build technology solutions that yield immediate, measurable business results.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 1,102 contacts → | ||||
Indirect evidence “Onix is a pioneer in cloud, data, and AI-driven transformation, delivering enterprise-grade innovation for more than two decades.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 1,096 contacts → | ||||
Indirect evidence “AgreeYa Solutions is a leading global provider of software, solutions and services to small, medium and global Fortune 100 organizations.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 1,046 contacts → | ||||
Partial evidence “PCM is a division of Insight | Together, we’ll help you navigate complex IT challenges.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 985 contacts → | ||||
Indirect evidence “Miratech helps visionaries to change the world.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 870 contacts → | ||||
Indirect evidence “Idexcel is a Professional Services and Technology Solutions provider specializing in Cloud Services, Cloud Native Services, Data Platforms and Intelligence, Automation & AI.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 703 contacts → | ||||
Indirect evidence “Cambridge Technology Enterprises Limited (CTEL)(NSE: CTE; BSE: 532801) is a global technology services company, recognized as a thought leader and innovator of enterprise…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 672 contacts → | ||||
Indirect evidence “Symphony is a global design and development software company headquartered in San Francisco with 650+ technologists located across engineering offices in Southeast Europe and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 617 contacts → | ||||
Partial evidence “Denali Advanced Integration delivers Enterprise IT solutions and services globally.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 612 contacts → | ||||
Indirect evidence “ProV is an award winning global technology consulting firm.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 574 contacts → | ||||
Partial evidence “Founded in 1993, ConvergeOne is a leading global IT services provider of collaboration and technology solutions for large and medium enterprises with decades of experience…” Source: RevenueBase Database · checked Sep 21, 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: tier 1 IT 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 tier 1 IT companies.
- Partial evidence
- Its own public description names part of tier 1 IT companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name tier 1 IT 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 717 tier 1 IT companies based in the United States
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Tier 1 IT companies based in the United States at a glance
As of Sep 21, 2026Companies by employee count
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 717 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 tier 1 IT 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 “tier 1 IT 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 tier 1 IT 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 tier 1 IT 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, 172,754 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 21, 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.
Tier 1 IT companies by metro
- Tier 1 IT companies in New York30
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 tier 1 IT 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 tier 1 IT companies are there based in the United States?
RevenueBase identified 717 tier 1 IT 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?
IBM, headquartered in New York, tops this list with the largest team on record.
Which city has the most tier 1 IT companies?
New York leads with 30 headquartered companies, followed by Houston (19) and Miami (16).
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 172,754 verified decision-maker contacts tracked across these 717 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 21, 2026.
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Tier 1 IT companies by geography
- Tier 1 IT companies based in Ahmedabad, India
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- Tier 1 IT companies based in Noida, India
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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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