Company lists · Data refreshed September 2026

Top 25 Software engineering staffing based in the United States

Name: Software engineering staffing based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 9,280 companies tracked

RevenueBase identified 9,280 software engineering staffing headquartered in the United States as of September 2026 and tracks 288,027 professional contacts across them, including 53,972 with verified work emails and 75,426 with mobile numbers. New York is the largest hub.

This list covers software engineering staffing 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 6, 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 6, 2026 86% judged on-target in blind review

9,280Companies

288,027Contacts tracked

53,972Verified emails

75,426Mobile numbers

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The 25 largest software engineering staffing based in the United States

Ranked by team size

Top 25 of 9,280 software engineering staffing based in the United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to software engineering staffing: 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	Robert Half	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 6, 2026	10001+	25,574 contacts →
	“At Robert Half, we prioritize your security-if you believe you've encountered a scam or fraudulent recruiter, please report it immediately to All Robert Half recruiters…” Source: company website · checked Sep 6, 2026
2	Insight Global	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 6, 2026	n/a	15,553 contacts →
	“Insight Global is an international talent and consulting company that delivers business outcomes in an ever-changing world.” Source: company website · checked Sep 6, 2026
3	Kforce INC	Partial evidence	Tampa, FL, United StatesHQ checked Sep 6, 2026	1,001-5,000	6,147 contacts →
	“Kforce is a solutions firm specializing in technology, finance and accounting, and professional staffing services.” Source: company website · checked Sep 6, 2026
4	Spherion	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 6, 2026	10001+	4,263 contacts →
	“We’re Spherion-a staffing and recruiting pioneer that’s been driving careers and helping businesses grow for over 75 years.” Source: company website · checked Sep 6, 2026
5	Artech L.L.C	Partial evidence	Morristown, NJ, United StatesHQ checked Sep 6, 2026	5,001-10,000	3,674 contacts →
	“Artech is the largest Women-Owned IT Staffing Firm in the U.S, with 34+ years of experience powering workforce transformation for Fortune 500 companies and public-sector…” Source: company website · checked Sep 6, 2026
6	Beacon Hill	Partial evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	1,001-5,000	3,238 contacts →
	“Beacon Hill was founded to set a new standard in search, career placement and flexible staffing.” Source: company website · checked Sep 6, 2026
7	24 Seven Talent	Indirect evidence	NY, United StatesHQ checked Sep 6, 2026	n/a	2,554 contacts →
	“24 Seven partners with companies to get marketing, creative, and digital work done by providing the right talent, innovation, and insights.” Source: company website · checked Sep 6, 2026
8	Airswift	Partial evidence	Houston, TX, United StatesHQ checked Sep 6, 2026	501-1,000	2,128 contacts →
	“We support STEM professionals looking for jobs with exceptional firms in the technology and engineering sectors.” Source: company website · checked Sep 6, 2026
9	NLB Services	Indirect evidence	Alpharetta, GA, United StatesHQ checked Sep 6, 2026	5,001-10,000	1,958 contacts →
	“Founded in 2007, NLB Services is a global AI-led technology and business transformation organization that helps enterprises accelerate growth, enhance operational resilience, and…” Source: company website · checked Sep 6, 2026
10	Exadel	Partial evidence	Walnut Creek, CA, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,874 contacts →
	“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.” Source: company website · checked Sep 6, 2026
11	Spectraforce	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,845 contacts →
	“Founded in 2004, SPECTRAFORCE® is a global staffing and workforce solutions company that helps organizations build high-performing teams across healthcare, technology, financial…” Source: company website · checked Sep 6, 2026
12	Addison Group	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,840 contacts →
	“Addison Group provides comprehensive talent solutions and consulting services across diverse practice areas, including Non-Clinical Healthcare, Information Technology (IT), Human…” Source: company website · checked Sep 6, 2026
13	MEDIX	Partial evidence	Chicago, IL, United StatesHQ checked Sep 6, 2026	501-1,000	1,753 contacts →
	“Medix provides workforce solutions to clients and creates opportunity for talent in the Healthcare, Life Sciences, Engineering and Technology fields.” Source: company website · checked Sep 6, 2026
14	Nesco Resource	Indirect evidence	Mayfield Heights, OH, United StatesHQ checked Sep 6, 2026	501-1,000	1,599 contacts →
	“Companies need talent.” Source: company website · checked Sep 6, 2026
15	Infotree Global Solutions	Indirect evidence	Plymouth, MI, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,545 contacts →
	“Infotree Global was founded in 2002 in a small office in Canton, MI, Infotree Global had a clear mission; To bring the world’s best talent together with the greatest companies…” Source: company website · checked Sep 6, 2026
16	Brooksource	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,480 contacts →
	“At Brooksource, relationships are at the center of everything we do.” Source: company website · checked Sep 6, 2026
17	System ONE	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 6, 2026	5,001-10,000	1,386 contacts →
	“System One is a leading provider of specialized, highly technical outsourced services, workforce solutions, staffing, and recruiting to critical infrastructure, technology, life…” Source: company website · checked Sep 6, 2026
18	ASK Consulting	Indirect evidence	Alpharetta, GA, United StatesHQ checked Sep 6, 2026	501-1,000	1,296 contacts →
	“ASK Consulting is an award-winning technology and professional services recruiting firm servicing Fortune 500 organizations nationally.” Source: company website · checked Sep 6, 2026
19	TRS Staffing Solutions	Strong evidence	Greenville, United StatesHQ checked Sep 6, 2026	201-500	1,187 contacts →
	“TRS Staffing Solutions is a world leading engineering recruitment agency specialising in the recruitment and supply of professional, engineering, technical and field talent.” Source: company website · checked Sep 6, 2026
20	Motion Recruitment	Indirect evidence	Boston, MA, United StatesHQ checked Sep 6, 2026	501-1,000	1,150 contacts →
	“Motion Recruitment, a Kelly® Company, delivers IT Talent Solutions for Contract, Direct Hire, Managed Solutions and Statement of Work to all of North America from our 21 delivery…” Source: company website · checked Sep 6, 2026
21	247hire	Indirect evidence	Oak Brook, IL, United StatesHQ checked Sep 6, 2026	201-500	1,059 contacts →
	“At 247Hire, our mission is simple: to empower yours.” Source: company website · checked Sep 6, 2026
22	Eclaro	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,024 contacts →
	“ECLARO is an award-winning Talent Solutions firm headquartered in New York City and operating in the U.S, Canada and the Philippines.” Source: company website · checked Sep 6, 2026
23	QPS Employment Group	Partial evidence	Brookfield, WI, United StatesHQ checked Sep 6, 2026	201-500	1,019 contacts →
	“Founded in 1985, QPS Employment Group has grown from a two-person operation to one of the nation's leading staffing and recruiting firms, with more than 300 internal employees…” Source: company website · checked Sep 6, 2026
24	dev.pro	Strong evidence	Charlotte, NC, United StatesHQ checked Sep 6, 2026	501-1,000	997 contacts →
	“Dev.Pro helps innovative technology companies scale their business by leveraging our software engineering expertise to support them every step of the way.” Source: company website · checked Sep 6, 2026
25	Diverse Lynx	Partial evidence	Princeton, NJ, United StatesHQ checked Sep 6, 2026	1,001-5,000	961 contacts →
	“Diverse Lynx is a WBENC- and NMSDC-certified partner, helping organizations turn diversity goals into measurable impact through staffing and contingent workforce solutions.” Source: company website · checked Sep 6, 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: software engineering staffing. 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 software engineering staffing.
Partial evidence: Its own public description names part of software engineering staffing, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name software engineering staffing. 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 9,280 software engineering staffing based in the United States

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Software engineering staffing based in the United States at a glance

As of Sep 6, 2026

18.7%Verified-email coverage

26.2%Mobile-number coverage

31.0Average contacts per company

11-50Median size (employees)

3.9%Largest-city concentration · New York

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

3,465

11-50

3,135

51-200

1,814

201-500

525

501-1,000

177

1,001-5,000

118

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

49,7580–30

3,67031–60

5561–90

2990–180

460180+

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 software engineering staffing, 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 “software engineering staffing”. 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 software engineering staffing), 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 software engineering staffing, 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, 53,972 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 6, 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.

Software engineering staffing by metro

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 software engineering staffing, 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 software engineering staffing are there based in the United States?

RevenueBase identified 9,280 software engineering staffing 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?

Robert Half, headquartered in Menlo Park, tops this list with the largest team on record.

Which city has the most software engineering staffing?

New York leads with 363 headquartered companies, followed by Houston (261) and Austin (211).

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 53,972 verified decision-maker contacts tracked across these 9,280 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 6, 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.