Company lists · Data refreshed August 2026

Top 17 Assessment and testing software companies based in London, United Kingdom

RevenueBase identified 44 company matches for assessment and testing software companies associated with London, United Kingdom as of August 2026 and tracks 2,712 professional contacts across them, including 219 with verified work emails and 110 with mobile numbers. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for assessment and testing software companies associated with London, United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed August 31, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Aug 31, 2026 How this list was built
44Companies
2,712Contacts tracked
219Verified emails
110Mobile numbers
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The 17 largest assessment and testing software companies based in London, United Kingdom

Ranked by team size
Top 17 of 44 company matches for assessment and testing software companies based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Aug 31, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United Kingdom51-200126 contacts →

Exact match

“Vretta is a multi-award winning organization that specializes in delivering assessment and learning experiences that support student success at the primary, secondary, and…”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
2Exact matchLondon, United Kingdom51-200121 contacts →

Exact match

“Codility is the #1 partner for global enterprises using skill-based assessments to build strong engineering teams.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
3Exact matchLondon, United Kingdom201-50063 contacts →

Exact match

“GL Assessment is a global leader in education technology with a clear mission: to accelerate learning for all children and adults of all ability levels and ethnic and social…”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
4Exact matchLondon, United Kingdom51-20035 contacts →

Exact match

“Unseen combines assessment technology, candidate engagement, psychometric design and recruitment support solutions, with intelligent insights at every stage.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
5Exact matchLondon, United Kingdom11-5028 contacts →

Exact match

“Doublestruck is a market leader in the educational world, offering hugely popular assessment software in Primary and Secondary schools.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
6Exact matchLondon, United Kingdom11-5020 contacts →

Exact match

“We help software teams maximise profits by shipping software with zero bugs & zero known vulnerabilities.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
7Exact matchLondon, United Kingdom11-5016 contacts →

Exact match

“Zzish is a software company that builds AI data-driven educational software to give teachers superpowers.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
8Exact matchLondon, United Kingdom11-5010 contacts →

Exact match

“Performance Learning is scientifically proven to accelerate performance, improve outcomes and nurture wellbeing.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
9Exact matchLondon, United Kingdom1-106 contacts →

Exact match

“TopScore provide assessment centre software, for virtual and face-to-face assessment centres & interviews.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
10Exact matchLondon, United Kingdom1-105 contacts →

Exact match

“We envision a world where anyone, anywhere can transform their life by accessing the world’s best data collection experience.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
11Exact matchLondon, United Kingdom51-2004 contacts →

Exact match

“Ascert was founded in 1992 as a supplier of specialized testing software and services to the Tandem NonStop server market - a platform for which "failure is not an option."…”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
12Exact matchLondon, United Kingdom11-504 contacts →

Exact match

“Our vision is to ensure that human potential is discovered, developed and utilised to make people and organisations successful.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
13Exact matchLondon, United Kingdom1-104 contacts →

Exact match

“LTS is dedicated to helping Training Offices and Students alike.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
14Exact matchLondon, United Kingdom1-103 contacts →

Exact match

“Engage capability and content creators everywhere - YouCap helps you to create and deliver your exam anywhere, anytime, on any device.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
15Exact matchLondon, United Kingdom1-103 contacts →

Exact match

“29FORWARD Australia is a leading provider of Test Maturity Assessments and Project, Program and Product Maturity Assessments as well as providing testing and project support to…”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
16Exact matchLondon, United Kingdom11-502 contacts →

Exact match

“H2 Cognitive Designs specialises in creating cognitive testing and remote clinical assessment products.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase
17Exact matchLondon, United Kingdom1-101 contacts →

Exact match

“Provider of easy to use Assessment services that educate whilst gathering assessment data.”

Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase

Showing 17 of 44 assessment and testing software companies based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 219 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Aug 31, 2026
8.1%Verified-email coverage
4.1%Mobile-number coverage
61.6Average contacts per company
11-50Median size (employees)
Aug 31, 2026Page data refreshed

Companies by employee count

1-10
19
11-50
14
51-200
8
201-500
2
1,001-5,000
1

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with London, United Kingdom whose business descriptions match “assessment and testing software companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 219 professional contacts with verified work emails across the full matched dataset. 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 August 31, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “assessment and testing software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 44 company matches for assessment and testing software companies associated with London, United Kingdom as of August 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Vretta tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United Kingdom has the most assessment and testing software companies?

London leads the United Kingdom with 49 company records, followed by Manchester (5) and Oxford (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 219 professional contacts with verified work emails tracked across these 44 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 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 SmartSearch, 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.