Company lists · Data refreshed September 2026

Top 25 Interim agencies worldwide

Name: Interim agencies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 43,812 companies tracked

RevenueBase identified 43,812 interim agencies worldwide as of September 2026 and tracks 1,490,360 professional contacts across them, including 197,710 with verified work emails. The United States is the largest market and London the largest hub.

This list covers interim agencies worldwide, 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. Country and city lists for interim agencies follow the table.

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 21, 2026 86% judged on-target in blind review

43,812Companies

1,490,360Contacts tracked

197,710Verified emails

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The 25 largest interim agencies worldwide

Ranked by team size

Top 25 of 43,812 interim agencies worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to interim agencies: 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	Adecco	Indirect evidence	Zurich, SwitzerlandHQ checked Sep 21, 2026	10001+	141,230 contacts →
	Indirect evidence “Perfect placements.” Source: RevenueBase Database · checked Sep 21, 2026
2	KELLY	Indirect evidence	Troy, MI, United StatesHQ checked Sep 21, 2026	10001+	30,378 contacts →
	Indirect evidence “We’ve been helping organizations find the people they need longer than any other company in the world.” Source: RevenueBase Database · checked Sep 21, 2026
3	Randstad	Indirect evidence	Diemen, NetherlandsHQ checked Sep 21, 2026	10001+	30,074 contacts →
	Indirect evidence “Randstad is the world’s largest talent company and a partner of choice to clients.” Source: RevenueBase Database · checked Sep 21, 2026
4	Manpowergroup	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 21, 2026	10001+	27,063 contacts →
	Indirect evidence “ManpowerGroup® (NYSE: MAN), the leading global workforce solutions company, helps organizations transform in a fast-changing world of work by sourcing, assessing, developing and…” Source: RevenueBase Database · checked Sep 21, 2026
5	Robert Half	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 21, 2026	10001+	25,574 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
6	HAYS	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	5,001-10,000	22,731 contacts →
	Indirect evidence “At Hays, we believe that the right job can transform a person's life - and the right person can transform a business.” Source: RevenueBase Database · checked Sep 21, 2026
7	Manpower	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 21, 2026	10001+	22,508 contacts →
	Indirect evidence “Manpower is the global leader in contingent and permanent recruitment workforce solutions.” Source: RevenueBase Database · checked Sep 21, 2026
8	Aerotek	Indirect evidence	Hanover, MD, United StatesHQ checked Sep 21, 2026	n/a	18,268 contacts →
	Indirect evidence “From economic headwinds to talent complexities, the challenges facing North American industry are real.” Source: RevenueBase Database · checked Sep 21, 2026
9	Insight Global	Strong evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	n/a	15,553 contacts →
	Strong evidence “Insight Global is an international talent and consulting company that delivers business outcomes in an ever-changing world.” Source: RevenueBase Database · checked Sep 21, 2026
10	Express Employment International	Strong evidence	Oklahoma City, OK, United StatesHQ checked Sep 21, 2026	10001+	12,647 contacts →
	Strong evidence “Founded in 1983 and corporately headquartered in Oklahoma City, Express Employment International supports the Express Employment Professionals franchise and related brands.” Source: RevenueBase Database · checked Sep 21, 2026
11	GI Group	Indirect evidence	Milan, United StatesHQ checked Sep 21, 2026	1,001-5,000	11,772 contacts →
	Indirect evidence “We are Gi Group, one of the world’s leading providers of operational workforce solutions.” Source: RevenueBase Database · checked Sep 21, 2026
12	Teamlease Services Limited	Indirect evidence	Bangalore, IndiaHQ checked Sep 21, 2026	5,001-10,000	8,903 contacts →
	Indirect evidence “TeamLease Services is one of India’s leading people supply chain companies offering a range of solutions to 3500+ employers for their hiring, productivity and scale challenges.” Source: RevenueBase Database · checked Sep 21, 2026
13	Randstad USA	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	1,001-5,000	8,522 contacts →
	Indirect evidence “Randstad North America, Inc.” Source: RevenueBase Database · checked Sep 21, 2026
14	Kforce INC	Indirect evidence	Tampa, FL, United StatesHQ checked Sep 21, 2026	1,001-5,000	6,147 contacts →
	Indirect evidence “Kforce is a solutions firm specializing in technology, finance and accounting, and professional staffing services.” Source: RevenueBase Database · checked Sep 21, 2026
15	REED	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	5,837 contacts →
	Indirect evidence “Reed is the largest family-run recruitment business in the world and we’ve been improving lives through work since 1960.” Source: RevenueBase Database · checked Sep 21, 2026
16	Peopleready	Indirect evidence	Tacoma, WA, United StatesHQ checked Sep 21, 2026	10001+	5,482 contacts →
	Indirect evidence “Want to be part of an award-winning team that is reimagining the way people connect with work?” Source: RevenueBase Database · checked Sep 21, 2026
17	Tradesmen International	Strong evidence	Macedonia, OH, United StatesHQ checked Sep 21, 2026	10001+	4,999 contacts →
	Strong evidence “Founded in 1992, Tradesmen International is North America’s premier resource for proven skilled craftsmen and labor consulting services.” Source: RevenueBase Database · checked Sep 21, 2026
18	Lancesoft, INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 21, 2026	5,001-10,000	4,877 contacts →
	Indirect evidence “Established in LanceSoft is a pioneer in delivering top-notch Global Workforce Solutions and IT Services to a diverse clientele.” Source: RevenueBase Database · checked Sep 21, 2026
19	VOLT	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,831 contacts →
	Indirect evidence “Volt (an Innova Solutions affiliate) is a multi-award winning global workforce solutions provider that propels businesses and careers forward with expert momentum.” Source: RevenueBase Database · checked Sep 21, 2026
20	Appleone Employment Services	Indirect evidence	Glendale, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,627 contacts →
	Indirect evidence “AppleOne Employment Services is a full-service employment company.” Source: RevenueBase Database · checked Sep 21, 2026
21	Programmed	Indirect evidence	Docklands, AustraliaHQ checked Sep 21, 2026	10001+	4,492 contacts →
	Indirect evidence “We are a leading provider of staffing, maintenance and facility management services.” Source: RevenueBase Database · checked Sep 21, 2026
22	Cloudstaff	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	5,001-10,000	4,342 contacts →
	Indirect evidence “We are Cloudstaff, the remote staffing pioneer that combines ethical outsourcing with enterprise-grade people tech.” Source: RevenueBase Database · checked Sep 21, 2026
23	Spherion	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	10001+	4,263 contacts →
	Indirect evidence “We’re Spherion-a staffing and recruiting pioneer that’s been driving careers and helping businesses grow for over 75 years.” Source: RevenueBase Database · checked Sep 21, 2026
24	Select Staffing	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	10001+	3,934 contacts →
	Indirect evidence “Select Staffing is a leading provider of temporary staffing and employment services in the U.S, with nationwide operations across multiple contingent staffing sectors.” Source: RevenueBase Database · checked Sep 21, 2026
25	Artech L.L.C	Indirect evidence	Morristown, NJ, United StatesHQ checked Sep 21, 2026	5,001-10,000	3,674 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 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: interim agencies. 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 interim agencies.
Partial evidence: Its own public description names part of interim agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name interim agencies. 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 43,812 interim agencies worldwide

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Interim agencies worldwide at a glance

As of Sep 21, 2026

13.3%Verified-email coverage

34.0Average contacts per company

11-50Median size (employees)

1.8%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

18,315

11-50

12,450

51-200

7,050

201-500

2,871

501-1,000

1,325

1,001-5,000

1,160

5,001-10,000

232

10001+

267

Email recency is reported on each country list linked below.

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 interim agencies, 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.
Coverage: Every country. Country and city lists for interim agencies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “interim agencies”. 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 interim agencies), 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 interim agencies, and records with no verified work email.
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, 197,710 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.

Interim agencies by location

182 lists · largest first

Every Interim agencies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 interim agencies, 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 interim agencies are there worldwide?

RevenueBase identified 43,812 interim agencies worldwide 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?

Adecco, headquartered in Zurich, tops this list with the largest team on record.

Which country has the most interim agencies?

The United States leads with 12,470 companies, followed by India (4,684) and the United Kingdom (3,451). Every interim agencies list by country and city is linked on this page.

Which city has the most interim agencies?

London leads with 801 headquartered companies, followed by New York (420) and Hyderabad (369).

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 197,710 verified decision-maker contacts tracked across these 43,812 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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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.