Company lists · Data refreshed November 2026

Top 20 Secure sdlc companies based in the United Kingdom

RevenueBase identified 54 company matches for secure sdlc companies associated with the United Kingdom as of November 2026 and tracks 449 professional contacts across them, including 186 with verified work emails. London is the largest hub.

This list covers company matches for secure sdlc companies associated with the 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 November 6, 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 Nov 6, 2026 How this list was built
54Companies
449Contacts tracked
186Verified emails
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The 20 largest secure sdlc companies based in the United Kingdom

Ranked by team size
Top 20 of 54 company matches for secure sdlc companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 KingdomHQ recorded Nov 6, 202651-20072 contacts →

Exact match

“Gemba Advantage make high-impact software that is secure, scalable and sustainable.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20065 contacts →

Exact match

“SecureFlag helps organizations prevent vulnerabilities at scale by embedding security into every stage of software development, from architecture decisions to the moment code is…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5053 contacts →

Exact match

“We deliver services in Cybersecurity, Application Security and DevOps and are trusted by some of the world’s leading brands to maximise the value of their security investments and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchMarlow, United KingdomHQ recorded Nov 6, 202611-5045 contacts →

Exact match

“DWS is a global enterprise software services company delivering development, testing, and software supply chain security solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchCheltenham, United KingdomHQ recorded Nov 6, 202611-5020 contacts →

Exact match

“CloudSecure delivers secure software and cloud systems for security-critical environments.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchNorthallerton, United KingdomHQ recorded Nov 6, 202611-508 contacts →

Exact match

“We’re a Cyber Security consultancy that specialise in DevSecOps, bringing together development and security expertise.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Captavio Technologies Limited is a globally focused cyber security and technology consulting firm headquartered in London, with established offices in Austin, Texas and Dubai, UAE.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchCranfield, United KingdomHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Secure Debug: Your Full-Spectrum Cybersecurity Guardian!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchSwindon, United KingdomHQ recorded Nov 6, 20261-107 contacts →

Exact match

“Klaatu IT Security Ltd is a boutique cybersecurity consultancy and managed security services provider, founded in 2017.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchWindsor, United KingdomHQ recorded Nov 6, 20261-104 contacts →

Exact match

“Be more cyber secure through better risk management.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchCoventry, United KingdomHQ recorded Nov 6, 20261-104 contacts →

Exact match

“Secure Elements presents a Product Security Lifecycle Management (SaaS) Platform integrating the fundamental elements of ‘Systems, Functional Safety & Cyber Security Engineering &…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchEdinburgh, United KingdomHQ recorded Nov 6, 202611-503 contacts →

Exact match

“Welcome to DevNack - Your trusted partner for bespoke software solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchBanbury, United KingdomHQ recorded Nov 6, 20261-103 contacts →

Exact match

“Digital Peak is your trusted partner in digital transformation, specializing in secure software development, AI/ML security, and comprehensive IT solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“Here at Fireduck, we're leading the way to completely transform the cybersecurity industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchPeterborough, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“We’re an expert provider of technical information security services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“Cyber Legion is the corporate technology and engineering organisation of Cyber Legion Ltd, a UK company designing, building, securing and governing AI systems, software products…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-102 contacts →

Exact match

“27k1 Ltd is a specialist software developer dedicated to information security and compliance automation for global organisations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-101 contacts →

Exact match

“IT Security & Develpment”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-101 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-101 contacts →

Exact match

“An independent software company building free developer tools”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 20 of 54 secure sdlc companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 186 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Secure sdlc companies based in the United Kingdom at a glance

As of Nov 6, 2026
41.4%Verified-email coverage
8.3Average contacts per company
1-10Median size (employees)
46.3%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
35
11-50
13
51-200
3
201-500
1

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 54 companies.

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 the United Kingdom whose business descriptions match “secure sdlc 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 186 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 November 6, 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.

Secure sdlc companies by metro

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 “secure sdlc companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many secure sdlc companies are there based in the United Kingdom?

RevenueBase identified 54 company matches for secure sdlc companies associated with the United Kingdom as of November 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?

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

Which city has the most secure sdlc companies?

London leads with 25 company records, followed by Birmingham (2) and Canterbury (2).

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 186 professional contacts with verified work emails tracked across these 54 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 November 6, 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.