These London-based human resources services companies are primarily large and mid-sized firms, with several established players alongside newer ventures. They offer a range of solutions from global talent acquisition to payroll and employee engagement. For example, AMS specializes in talent solutions, CloudPay provides global payroll services, Santa Fe Relocation focuses on relocation services, and Mercans offers global payroll and employer of record services.
The companies demonstrate a focus on supporting global workforces and digital HR solutions. Many of these firms were founded in the late 20th century or early 21st century, with a cluster of companies like AMS, CloudPay, McLean & Company, and TopSource established around the turn of the millennium.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
AMSweareams.com
Global talent solutions business specializing in sourcing, selecting, and retaining top talent through digital innovation, HR expertise, and a holistic approach to workforce management |
8,718 | |||
| 2 | 8,569 | ||||
| 3 |
fresherjobsify.org
This company provides a wide range of content covering news, business, sport, commentary, lifestyle, and culture related to fresher jobs |
5,935 | |||
| 4 |
NGA Human Resources, an Alight companyalight.com
Global provider of HR solutions, pioneering digital HR, payroll, compliance, and workforce data to enhance employee experiences, save costs, and transform organizations worldwide |
2,789 | |||
| 5 |
CloudPaycloudpay.com
CloudPay provides global companies with modern solutions for employee pay processes, including payroll, payments, and on-demand pay, guided by trusted experts |
1,460 | |||
| 6 |
Santa Fe Relocationsantaferelo.com
Specializes in managing and delivering high-quality relocation services to help corporations and employees settle in new global locations. |
1,436 | |||
| 7 | 
ONLINE WORKjobsify.org
Opportunity for individuals to earn income from home by investing time in social media Seeking young, dynamic individuals for part-time/full-time work |
951 | |||
| 8 |
Remote Helpersrh-s.com
The company offers dedicated English-speaking Virtual Assistants for a variety of online marketing tasks, including content management, customer support, and design |
822 | |||
| 9 |
TopSourcetopsourceworldwide.com
Strategic talent deployment and globalization services enabling organizations to hire, operate, and expand efficiently across worldwide markets with compliance. |
530 | |||
| 10 |
McLean & Companybit.ly
We partner with organizations to create data-driven workplaces that prepare for the future, offering assessments, action plans, training, and more |
384 | |||
| 11 |
Penna, an LHH brandpenna.com
People management business partnering with public and private sector, offering attraction strategies, recruitment selection, assessment for top talent in executive roles Part of Adecco Group |
371 | |||
| 12 |
Headstart (Defunct)headstart.io
This company uses advanced candidate screening to help recruiters identify potential and hire the best candidates, promoting fair and unbiased hiring practices |
224 | |||
| 13 |
Mercansmercans.com
Offers global payroll and EOR services, enabling businesses to manage payrolls across 160 countries with proprietary SaaS platforms and expert local support. |
216 | |||
| 14 | 203 | ||||
| 15 |
Best Places to Work Certification Programbestplacestoworkfor.org
Global certification provider honoring organizations with excellent HR practices and employee experiences through rigorous assessments aligned with latest trends |
201 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
Dabsterdabster.net
Talent management and workforce solutions provider specializing in SAP and PEGA, aiming to improve clients' productivity and profitability through strategic values and principles |
187 | |||
| 17 |
Cezanne HRcezannehr.com
Providing cloud-based HR and payroll software solutions covering recruitment, onboarding, administration, performance management, surveys, and payroll for businesses. |
184 | |||
| 18 |
ECA Internationaleca.global
Provides technology, data, and expertise to manage compensation and benefits for internationally mobile employees across various assignment durations. |
161 | |||
| 19 |
Playrollplayroll.com
provides a global platform for businesses to hire, pay, and retain talent compliantly across 180+ countries with flat fees |
161 | |||
| 20 |
Peppypeppy.health
Peppy is a health app connecting employees to expert care for various health challenges, improving well-being and productivity at work |
158 | |||
| 21 |
Veremarkveremark.com
A b2b background screening and reference checking platform streamlining hiring processes for companies, providing faster, data-compliant, and insightful checks for candidates |
156 | |||
| 22 |
Independent Recruitermailchi.mp
Connecting independent recruitment consultants seeking improved working conditions and higher earnings through a collaborative platform |
156 | |||
| 23 | 152 | ||||
| 24 |
Hightekershightekers.com
Streamlining business management for IT and engineering consultants and recruiters across Europe with premium services including tax management, contract negotiation, payroll, and more Join our growing community! |
150 | |||
| 25 |
Elementsweareelements.io
They revolutionize talent consultancy by embedding consultants within organizations like Spotify and Atlassian, driving transformative change and growth worldwide |
114 | |||
| 26 |
Skills Allianceskillsalliance.com
Global Life Science workforce solutions company with 20 years of experience, providing talent acquisition solutions for pharmaceutical, biotech, and medical companies worldwide |
110 | |||
| 27 |
HR Grapevinehrgrapevine.com
A leading digital resource for HR professionals, offering daily news, learning resources, events, and global networking across US and UK websites Trusted for insightful HR content |
64 | |||
| 28 |
Udderudder.rocks
Helps HR, TA, and Learning leaders maximize ROI from modern HR tech through digital transformation services, also assists HR tech vendors with insights and product development. |
49 | |||
| 29 |
The Connectr Groupconnectr.com
Providing Talent Technology, Talent Acquisition, and Early Engagement services to empower individuals and create opportunities for shaping their future |
49 | |||
| 30 |
Hunter Adamshunteradams.co.uk
An employee-owned HR consultancy offering services in HR consulting, interim placements, recruitment, employee engagement, cost reduction, and business growth support Operating UK-wide and internationally |
48 | |||
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 13, 2026.
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The same list elsewhere in United Kingdom
- Human Resources Services companies in the United Kingdom 114
- Human Resources Services companies in England 101