Company lists · Data verified August 2026

Top 25 Assessment software companies based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 69 companies tracked

There are 69 assessment software companies headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 886 professional contacts across them, including 349 with verified work emails and 55 with mobile numbers. London is the largest hub.

This list covers assessment software companies headquartered in London, United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

69Companies

886Contacts tracked

349Verified emails

55Mobile numbers

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The 25 largest assessment software companies based in London, United Kingdom

Ranked by team size

Top 25 of 69 assessment software companies based in London, United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Vretta	London	51-200	126	54
2	Codility	London	51-200	121	58
3	Saville Assessment	London	51-200	113	55
4	GL Assessment	London	201-500	63	36
5	Accelerate People	London	11-50	38	22
6	Equalture	London	11-50	36	23
7	Unseen	London	51-200	35	19
8	Doublestruck	London	11-50	28	21
9	Thrive	London	11-50	21	10
10	ZZISH	London	11-50	16	5
11	salve.inno	London	11-50	16	1
12	MY Performance Learning	London	11-50	10	3
13	Neurosight	London	11-50	8	7
14	Neuroworx	London	11-50	8	5
15	Techlerator	London	11-50	8	2
16	ETA Technologies	London	1-10	8	1
17	Geektastic	London	51-200	7	1
18	Topscore Unseen Group	London	1-10	6	4
19	quodit.io	London	1-10	5	2
20	Cognitive Persona UK Limited	London	11-50	4	2
21	Learner Tracking Systems	London	1-10	4	2
22	Barker White	London	1-10	4	2
23	The English Quiz	London	1-10	4	2
24	Thrivemap	London	11-50	4	1
25	Assessfirst UK	London	51-200	3	3

Showing 25 of 69 assessment software companies based in London, United Kingdom

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Assessment software companies based in London, United Kingdom at a glance

As of Aug 28, 2026

11-50Median size (employees)

LondonLargest hub · 69 HQs

55Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Assessment software companies by metro in the United Kingdom

Metro	Companies
Assessment software companies in London	69
Assessment software companies in Oxford	5
Assessment software companies in Bristol	3
Assessment software companies in Bournemouth	2
Assessment software companies in Manchester	2
Assessment software companies in Cambridge	2
Assessment software companies in Belfast	2

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “assessment software companies”, with match quality audited by blind human judging, and headquartered in London, United Kingdom.
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: Contact records re-verify on a rolling cadence; 3 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many assessment software companies are there based in London, United Kingdom?

There are 69 assessment software companies headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most assessment software companies?

London leads with 69 headquartered companies, followed by Oxford (5) and Bristol (3).

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 349 verified decision-maker contacts tracked across these 69 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.