Company lists · Data refreshed September 2026

Top 25 HR software developers based in London, United Kingdom

Name: HR software developers based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 103 companies tracked

RevenueBase identified 103 HR software developers headquartered in London, United Kingdom as of September 2026 and tracks 1,028 professional contacts across them, including 282 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers HR software developers headquartered in London, United Kingdom, 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 28, 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 28, 2026 86% judged on-target in blind review

103Companies

1,028Contacts tracked

282Verified emails

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The 25 largest HR software developers based in London, United Kingdom

Ranked by team size

Top 25 of 103 HR software developers based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to HR software developers: 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	PLUMM	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	155 contacts →
	Partial evidence “Plumm is the next-generation HR platform designed to replace your patchwork of tools with one powerful, integrated system.” Source: RevenueBase Database · checked Sep 28, 2026
2	Cezanne HR	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	127 contacts →
	Strong evidence “Cezanne HR is leading the way in delivering smart, sophisticated and cost-effective Cloud HR and Native payroll software to UK and international businesses.” Source: RevenueBase Database · checked Sep 28, 2026
3	Jibble	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	68 contacts →
	Partial evidence “Jibble Group builds HR SaaS products.” Source: RevenueBase Database · checked Sep 28, 2026
4	Seven20	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Indirect evidence “Salesforce for recruitment.” Source: RevenueBase Database · checked Sep 28, 2026
5	ZELT	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	31 contacts →
	Partial evidence “Zelt is the UK's leading native all-in-one HR and Finance platform, built to give mid-sized businesses the tools they need to manage, pay, and grow their people.” Source: RevenueBase Database · checked Sep 28, 2026
6	Zenithr	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	20 contacts →
	Partial evidence “Zenithr is a leading provider of HR technology and intelligence solutions, committed to enhancing talent management and development for businesses.” Source: RevenueBase Database · checked Sep 28, 2026
7	GO Enterprise HR Software	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	14 contacts →
	Partial evidence “Go Enterprise HR: The Ultimate All-in-One HR Solution for Growing Businesses HR doesn’t have to be complicated.” Source: RevenueBase Database · checked Sep 28, 2026
8	Hubbubhr	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	12 contacts →
	Partial evidence “HubbubHR is proven, future-ready, Azure-secure enterprise people & AI tech built for what’s next Big legacy HR/ERP systems introduce rigidity, exorbitant cost, and delay.” Source: RevenueBase Database · checked Sep 28, 2026
9	Walkzero	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “Walkzero, is developing an AI-driven Human Resource Management System (HRMS) to help small and medium-sized enterprises (SMEs) streamline their HR processes, enhance employee…” Source: RevenueBase Database · checked Sep 28, 2026
10	Disruptive HR	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	10 contacts →
	Partial evidence “At Disruptive HR, we help HR teams do HR differently.” Source: RevenueBase Database · checked Sep 28, 2026
11	Pace HR	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	10 contacts →
	Indirect evidence “Bespoke human resources solutions tailored to suit any business, at any stage.” Source: RevenueBase Database · checked Sep 28, 2026
12	Comcloudit	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	10 contacts →
	Partial evidence “Transforming HR with Smart Automation.” Source: RevenueBase Database · checked Sep 28, 2026
13	Exelsys LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “Exelsys provides an integrated collaborative Human Capital Management System, enterprises need to manage the full hire-to-retire process for both full-time and part-time employees…” Source: RevenueBase Database · checked Sep 28, 2026
14	Hubbado	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “We know that managing your workforce can be time-consuming and expensive, with multiple software providers, and difficulties tracking costs, validating charges, or reconciling…” Source: RevenueBase Database · checked Sep 28, 2026
15	Upstrax	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “At Upstrax, we're revolutionizing the way businesses manage their most valuable asset-their people.” Source: RevenueBase Database · checked Sep 28, 2026
16	Rethink HR LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “As HR professionals, you put your people first, not your tech.” Source: RevenueBase Database · checked Sep 28, 2026
17	Solution22	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Solution22 is a dynamic HR consultancy who are able to deliver a range of bespoke human resource solutions to meet your people management needs.” Source: RevenueBase Database · checked Sep 28, 2026
18	Cegna Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	4 contacts →
	Partial evidence “Cegna was founded by a team of HR/Payroll technology experts and business process subject matter experts who are geared to partner with clients to help realise the full potential…” Source: RevenueBase Database · checked Sep 28, 2026
19	HR Optimisation	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “HR Optimisation Ltd works with small and medium sized businesses to put in place pragmatic, simple and really effective HR Strategies and actions that will save you money…” Source: RevenueBase Database · checked Sep 28, 2026
20	CA Legal	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “CA Legal is a consultancy business focused on developing and enhancing your business’s greatest asset; we advise on how to find, hire, develop, retain and get the best out of the…” Source: RevenueBase Database · checked Sep 28, 2026
21	Jini Solutions LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “We are a small team of HR professionals with extensive experience in HR operations and consulting.” Source: RevenueBase Database · checked Sep 28, 2026
22	ehubt.io	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	3 contacts →
	Partial evidence “eHubt.io offers innovative HR and business solutions designed to streamline workforce management, enhance employee engagement, and optimize business performance.” Source: RevenueBase Database · checked Sep 28, 2026
23	Ipsus Consulting	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Ipsus Human Capital is an Executive Search and HR Consultancy firm that offers three main services: 1.” Source: RevenueBase Database · checked Sep 28, 2026
24	Mcmanus Ford	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	2 contacts →
	Partial evidence “McManus Ford is a specialist HR Technology recruitment partner supporting UK and European organisations across global HR transformation programmes by delivering talent tailored to…” Source: RevenueBase Database · checked Sep 28, 2026
25	The Reinvent Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “As a strategic human capital partner, The Reinvent Group deploys elite project talent to lead and de-risk complex HRIS transformations throughout Europe.” Source: RevenueBase Database · checked Sep 28, 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: HR software developers. 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 HR software developers.
Partial evidence: Its own public description names part of HR software developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name HR software developers. 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 103 HR software developers based in London, United Kingdom

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HR software developers based in London, United Kingdom at a glance

As of Sep 28, 2026

27.4%Verified-email coverage

10.0Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 103 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 HR software developers, 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 London, United Kingdom whose own description of what they do matches “HR software developers”. 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 HR software developers), 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 HR software developers, and records with no verified work email. Companies headquartered outside London 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, 282 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 28, 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.

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 HR software developers, 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 HR software developers are there based in London, United Kingdom?

RevenueBase identified 103 HR software developers headquartered in London, United Kingdom 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?

PLUMM, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most HR software developers?

London leads the United Kingdom with 103 headquartered companies, followed by Manchester (10) and Bristol (7).

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 282 verified decision-maker contacts tracked across these 103 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 28, 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.