Company lists · Data refreshed September 2026

Top 17 Static application security testing software companies based in the United Kingdom

RevenueBase identified 38 static application security testing software companies headquartered in the United Kingdom as of September 2026 and tracks 853 professional contacts across them, including 268 with verified work emails. London is the largest hub.

This list covers static application security testing software companies headquartered in the 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 14, 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 14, 2026 86% judged on-target in blind review
38Companies
853Contacts tracked
268Verified emails
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The 17 largest static application security testing software companies based in the United Kingdom

Ranked by team size
Top 17 of 38 static application security testing software companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to static application security testing software companies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidenceKnutsford, United KingdomHQ checked Sep 14, 202651-200267 contacts →

Strong evidence

“PortSwigger is a global leader in the creation of software tools for security testing of web applications.”

Source: RevenueBase Database · checked Sep 14, 2026
2Strong evidenceLeeds, United KingdomHQ checked Sep 14, 202651-20099 contacts →

Strong evidence

“AppCheck is a Complete Enterprise Security Testing Solution that provides up to the minute vulnerability coverage for your entire estate.”

Source: RevenueBase Database · checked Sep 14, 2026
3Indirect evidenceLondon, United KingdomHQ checked Sep 14, 202651-20057 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 14, 2026
4Partial evidenceLondon, United KingdomHQ checked Sep 14, 202611-5015 contacts →

Partial evidence

“is an ISO 9001:2015 and ISO/IEC 27001:2022 certified, DPIIT-recognized cybersecurity company delivering structured External Vulnerability Assessment & Penetration Testing (VAPT)…”

Source: RevenueBase Database · checked Sep 14, 2026
5Indirect evidenceBath, United KingdomHQ checked Sep 14, 202611-5011 contacts →

Indirect evidence

“At Mobius Binary we care about your reputation and the loss that could result from violating your digital boundaries.”

Source: RevenueBase Database · checked Sep 14, 2026
6Indirect evidenceLondon, United KingdomHQ checked Sep 14, 202611-5010 contacts →

Indirect evidence

“Validato helps organisations continuously validate and strengthen their cybersecurity controls using safe-to-use, production-ready Breach and Attack Simulation (BAS).”

Source: RevenueBase Database · checked Sep 14, 2026
7Partial evidenceManchester, United KingdomHQ checked Sep 14, 202611-508 contacts →

Partial evidence

“Cytix is the AppSec layer that focuses testing where it matters.”

Source: RevenueBase Database · checked Sep 14, 2026
8Indirect evidenceLondon, United KingdomHQ checked Sep 14, 20261-106 contacts →

Indirect evidence

“Appsecco Inc.”

Source: RevenueBase Database · checked Sep 14, 2026
9Partial evidenceBrighton, United KingdomHQ checked Sep 14, 202611-505 contacts →

Partial evidence

“Informer's External Attack Surface Management (EASM) and Pen Testing platform help CISOs, CTOs and IT teams map external assets and identify vulnerabilities in real time so they…”

Source: RevenueBase Database · checked Sep 14, 2026
10Partial evidenceLeeds, United KingdomHQ checked Sep 14, 20261-103 contacts →

Partial evidence

“CodeGrazer is the newly formed pentest firm based in Leeds, UK, offering security services to protect private companies internal infrastructure and web services with quick…”

Source: RevenueBase Database · checked Sep 14, 2026
11Strong evidenceLondon, United KingdomHQ checked Sep 14, 202611-503 contacts →

Strong evidence

“Zeroday Co, Ltd is a company focusing on developing and delivering state-of-art application security testing tools/platforms.”

Source: RevenueBase Database · checked Sep 14, 2026
12Strong evidenceLondon, United KingdomHQ checked Sep 14, 20261-103 contacts →

Strong evidence

“At Securityium, we're dedicated to transforming the way you experience security testing for your business.”

Source: RevenueBase Database · checked Sep 14, 2026
13Indirect evidenceLondon, United KingdomHQ checked Sep 14, 20261-103 contacts →

Indirect evidence

“CyberLegion is a UK/EU-based cybersecurity company helping organizations build, test and operate secure digital products.”

Source: RevenueBase Database · checked Sep 14, 2026
14Indirect evidenceEdinburgh, United KingdomHQ checked Sep 14, 20261-103 contacts →

Indirect evidence

“Welcome to Vulert!”

Source: RevenueBase Database · checked Sep 14, 2026
15Strong evidenceLeeds, United KingdomHQ checked Sep 14, 202611-502 contacts →

Strong evidence

“Dhound is a cybersecurity company providing web application penetration testing, focused on manual approach and comprehensive delivery, helping IT companies be secure and…”

Source: RevenueBase Database · checked Sep 14, 2026
16Strong evidenceLondon, United KingdomHQ checked Sep 14, 20261-101 contacts →

Strong evidence

“Websecurify is a web application security company.”

Source: RevenueBase Database · checked Sep 14, 2026
17Strong evidenceLondon, United KingdomHQ checked Sep 14, 20261-101 contacts →

Strong evidence

Software security consulting, with a specialism in mobile & web technologies.”

Source: RevenueBase Database · checked Sep 14, 2026

Showing 17 of 38 static application security testing software companies based in the United Kingdom

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Static application security testing software companies based in the United Kingdom at a glance

As of Sep 14, 2026
31.4%Verified-email coverage
22.4Average contacts per company
1-10Median size (employees)
52.6%Largest-city concentration · London
Sep 14, 2026Page data refreshed

Companies by employee count

1-10
22
11-50
11
51-200
5

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 38 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 static application security testing software companies, 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 the United Kingdom whose own description of what they do matches “static application security testing software companies”. 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 static application security testing software companies), 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 static application security testing software companies, and records with no verified work email. Companies headquartered outside United Kingdom 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, 268 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 14, 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 static application security testing software companies, 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 static application security testing software companies are there based in the United Kingdom?

RevenueBase identified 38 static application security testing software companies headquartered in the 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?

Portswigger, headquartered in United Kingdom, tops this list with the largest team on record.

Which city has the most static application security testing software companies?

London leads with 20 headquartered companies, followed by Manchester (4) and Leeds (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 268 verified decision-maker contacts tracked across these 38 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 14, 2026.

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Related lists

Static application security testing software companies by geography

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.