# 30 leading Human Resources Services companies in London

Tamtam tracks 46 Human Resources Services companies headquartered in London. This list ranks the 30 largest by number of employees on LinkedIn, led by AMS, At home and fresher. Their median headcount is 201. Half of them were founded in 2009 or later.

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.

🇬🇧 London · 30 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [AMS](https://www.tamtam.ai/c/ams) (weareams.com)<br>Global talent solutions business specializing in sourcing, selecting, and retaining top talent through digital innovation, HR expertise, and a holistic approach to workforce management | Human Resources Services | 🇬🇧 London | 8,718 | 1996 |
| 2 | [At home](https://www.tamtam.ai/c/at-home) (jobsify.org)<br>The company allows employees to work remotely from their homes | Human Resources Services | 🇬🇧 London | 8,569 |  |
| 3 | [fresher](https://www.tamtam.ai/c/fresher) (jobsify.org)<br>This company provides a wide range of content covering news, business, sport, commentary, lifestyle, and culture related to fresher jobs | Human Resources Services | 🇬🇧 London | 5,935 |  |
| 4 | [NGA Human Resources, an Alight company](https://www.tamtam.ai/c/nga-human-resources-an-alight-company) (alight.com)<br>Global provider of HR solutions, pioneering digital HR, payroll, compliance, and workforce data to enhance employee experiences, save costs, and transform organizations worldwide | Human Resources Services | 🇬🇧 London | 2,789 |  |
| 5 | [CloudPay](https://www.tamtam.ai/c/cloudpay) (cloudpay.com)<br>CloudPay provides global companies with modern solutions for employee pay processes, including payroll, payments, and on-demand pay, guided by trusted experts | Human Resources Services | 🇬🇧 London | 1,460 | 1996 |
| 6 | [Santa Fe Relocation](https://www.tamtam.ai/c/santa-fe-relocation) (santaferelo.com)<br>Specializes in managing and delivering high-quality relocation services to help corporations and employees settle in new global locations. | Human Resources Services | 🇬🇧 London | 1,436 | 1959 |
| 7 | [ONLINE WORK](https://www.tamtam.ai/c/online-work) (jobsify.org)<br>Opportunity for individuals to earn income from home by investing time in social media Seeking young, dynamic individuals for part-time/full-time work | Human Resources Services | 🇬🇧 London | 951 | 1978 |
| 8 | [Remote Helpers](https://www.tamtam.ai/c/remote-helpers) (rh-s.com)<br>The company offers dedicated English-speaking Virtual Assistants for a variety of online marketing tasks, including content management, customer support, and design | Human Resources Services | 🇬🇧 London | 822 | 2018 |
| 9 | [TopSource](https://www.tamtam.ai/c/topsource) (topsourceworldwide.com)<br>Strategic talent deployment and globalization services enabling organizations to hire, operate, and expand efficiently across worldwide markets with compliance. | Human Resources Services | 🇬🇧 London | 530 | 2004 |
| 10 | [McLean & Company](https://www.tamtam.ai/c/mclean-and-company) (bit.ly)<br>We partner with organizations to create data-driven workplaces that prepare for the future, offering assessments, action plans, training, and more | Human Resources Services | 🇬🇧 London | 384 | 1997 |
| 11 | [Penna, an LHH brand](https://www.tamtam.ai/c/penna-an-lhh-brand) (penna.com)<br>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 | Human Resources Services | 🇬🇧 London | 371 | 1974 |
| 12 | [Headstart (Defunct)](https://www.tamtam.ai/c/headstart-defunct) (headstart.io)<br>This company uses advanced candidate screening to help recruiters identify potential and hire the best candidates, promoting fair and unbiased hiring practices | Human Resources Services | 🇬🇧 London | 224 | 2015 |
| 13 | [Mercans](https://www.tamtam.ai/c/mercans) (mercans.com)<br>Offers global payroll and EOR services, enabling businesses to manage payrolls across 160 countries with proprietary SaaS platforms and expert local support. | Human Resources Services | 🇬🇧 London | 216 | 2003 |
| 14 | [Mo](https://www.tamtam.ai/c/mo-london) (mo.work)<br>Mo offers a unique reward and recognition platform for managers to engage and appreciate their teams beyond traditional top-down approaches | Human Resources Services | 🇬🇧 London | 203 | 2015 |
| 15 | [Best Places to Work Certification Program](https://www.tamtam.ai/c/best-places-to-work-certification-program) (bestplacestoworkfor.org)<br>Global certification provider honoring organizations with excellent HR practices and employee experiences through rigorous assessments aligned with latest trends | Human Resources Services | 🇬🇧 London | 201 | 2017 |
| 16 | [Dabster](https://www.tamtam.ai/c/dabster) (dabster.net)<br>Talent management and workforce solutions provider specializing in SAP and PEGA, aiming to improve clients' productivity and profitability through strategic values and principles | Human Resources Services | 🇬🇧 London | 187 | 2007 |
| 17 | [Cezanne HR](https://www.tamtam.ai/c/cezanne-hr) (cezannehr.com)<br>Providing cloud-based HR and payroll software solutions covering recruitment, onboarding, administration, performance management, surveys, and payroll for businesses. | Human Resources Services | 🇬🇧 London | 184 | 2013 |
| 18 | [ECA International](https://www.tamtam.ai/c/eca-international) (eca.global)<br>Provides technology, data, and expertise to manage compensation and benefits for internationally mobile employees across various assignment durations. | Human Resources Services | 🇬🇧 London | 161 | 1971 |
| 19 | [Playroll](https://www.tamtam.ai/c/playroll) (playroll.com)<br>provides a global platform for businesses to hire, pay, and retain talent compliantly across 180+ countries with flat fees | Human Resources Services | 🇬🇧 London | 161 |  |
| 20 | [Peppy](https://www.tamtam.ai/c/peppy) (peppy.health)<br>Peppy is a health app connecting employees to expert care for various health challenges, improving well-being and productivity at work | Human Resources Services | 🇬🇧 London | 158 | 2018 |
| 21 | [Veremark](https://www.tamtam.ai/c/veremark) (veremark.com)<br>A b2b background screening and reference checking platform streamlining hiring processes for companies, providing faster, data-compliant, and insightful checks for candidates | Human Resources Services | 🇬🇧 London | 156 | 2018 |
| 22 | [Independent Recruiter](https://www.tamtam.ai/c/independent-recruiter) (mailchi.mp)<br>Connecting independent recruitment consultants seeking improved working conditions and higher earnings through a collaborative platform | Human Resources Services | 🇬🇧 London | 156 | 2018 |
| 23 | [Plumm](https://www.tamtam.ai/c/plumm) (hubs.ly)<br>Offers a unified HR platform for payroll, recruitment, learning, wellbeing, and compliance, streamlining employee lifecycle management with smart automations and real-time insights. | Human Resources Services | 🇬🇧 London | 152 | 2017 |
| 24 | [Hightekers](https://www.tamtam.ai/c/hightekers) (hightekers.com)<br>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! | Human Resources Services | 🇬🇧 London | 150 |  |
| 25 | [Elements](https://www.tamtam.ai/c/elements-london) (weareelements.io)<br>They revolutionize talent consultancy by embedding consultants within organizations like Spotify and Atlassian, driving transformative change and growth worldwide | Human Resources Services | 🇬🇧 London | 114 | 2009 |
| 26 | [Skills Alliance](https://www.tamtam.ai/c/skills-alliance) (skillsalliance.com)<br>Global Life Science workforce solutions company with 20 years of experience, providing talent acquisition solutions for pharmaceutical, biotech, and medical companies worldwide | Human Resources Services | 🇬🇧 London | 110 | 2005 |
| 27 | [HR Grapevine](https://www.tamtam.ai/c/hr-grapevine) (hrgrapevine.com)<br>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 | Human Resources Services | 🇬🇧 London | 64 | 1979 |
| 28 | [Udder](https://www.tamtam.ai/c/udder) (udder.rocks)<br>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. | Human Resources Services | 🇬🇧 London | 49 | 2018 |
| 29 | [The Connectr Group](https://www.tamtam.ai/c/the-connectr-group) (connectr.com)<br>Providing Talent Technology, Talent Acquisition, and Early Engagement services to empower individuals and create opportunities for shaping their future | Human Resources Services | 🇬🇧 London | 49 | 2011 |
| 30 | [Hunter Adams](https://www.tamtam.ai/c/hunter-adams) (hunteradams.co.uk)<br>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 | Human Resources Services | 🇬🇧 London | 48 | 2011 |

## How this list is built

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.

## More company lists in London

- [The largest companies in London](https://www.tamtam.ai/l/largest-companies-london) (12,882)
- [Multinational companies in London](https://www.tamtam.ai/l/multinational-companies-london) (3,652)
- [Financial Services companies in London](https://www.tamtam.ai/l/financial-services-companies-london) (1,862)
- [Financial services firms in London](https://www.tamtam.ai/l/financial-services-firms-london) (1,824)
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- [Retail Apparel and Fashion companies in London](https://www.tamtam.ai/l/retail-apparel-and-fashion-companies-london) (498)
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- [Hotel and hospitality groups in London](https://www.tamtam.ai/l/hospitality-groups-london) (445)
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## The same list elsewhere in United Kingdom

- [Human Resources Services companies in the United Kingdom](https://www.tamtam.ai/l/human-resources-services-companies-united-kingdom) (114)
- [Human Resources Services companies in England](https://www.tamtam.ai/l/human-resources-services-companies-england) (101)

## The same list elsewhere

- [Human Resources Services companies in the world](https://www.tamtam.ai/l/human-resources-services-companies-in-the-world) (2,224)
- [Human Resources Services companies in Europe](https://www.tamtam.ai/l/human-resources-services-companies-in-europe) (1,251)

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Source: https://www.tamtam.ai/l/human-resources-services-companies-london