The UK IT & Security Software Market (2026)

Updated 17 August 2026, 15:36 UTC

61 UK it & security software companies are actively bought by businesses tracked on Cledara, led by Intruder (0.05% market share). Rankings reflect real purchasing data — what companies actually pay for — not analyst estimates. Updated monthly. Data as of 17 August 2026, 15:36 UTC.

Most popular UK it & security software companies

#	Product	Category	Description	Founded	Employees	Funding	12-mo rank
1	Intruder	IT & Security	Intruder is a platform that offers continuous vulnerability management and attack surface monitoring, making it easy for companies to secure their systems. The product helps businesses address the problem of ensuring the security of their IT infrastructure and web applications.	2,015	51-200 employees	Under $1M	-64
2	OnSecurity	IT & Security	OnSecurity is a product that offers specialized and comprehensive penetration testing solutions.	2,018	51-200 employees	$5M - $10M	-724
3	CyberSmart	IT & Security	CyberSmart is a cybersecurity platform offering Active Protect‚Äîan endpoint monitoring and management solution with 24/7 vulnerability scanning, IT policy enforcement, and cybersecurity awareness training. It supports multiple devices and operating systems, promotes compliance with cybersecurity standards, and simplifies certifications.	2,016	51-200 employees	$10M - $25M	-323
4	PortSwigger	IT & Security	PortSwigger products help to secure the web and speed up software delivery.	2,008	51-200 employees		+120
5	CloudM	IT & Security	CloudM is a software company offering solutions for data migration, backup, automation, and archiving for Google Workspace and Microsoft 365. Their main product comprises tools to migrate, backup, automate, and archive data across these platforms.	2,008	201-500 employees
6	Approov	IT & Security	Approov is a mobile security platform that ensures only authorized mobile apps, running on unaltered devices, can access APIs and their cloud-based backend services. It uses runtime application self-protection (RASP) and a challenge-response mechanism to authenticate app integrity, without relying on embedded secrets in the app. This approach aims to protect against a variety of threats, including	2,001	11-50 employees	$5M - $10M	+69
7	StatusCake	IT & Security	StatusCake is a platform that provides uptime monitoring, page speed monitoring, and more. The product offers a suite of monitoring tools that help businesses stay online, drive revenue, and stay ahead of the competition.	2,012	2-10 employees		+49
8	Cloud 66	IT & Security	Cloud 66 provides ops tools for developers to build, deliver, deploy, and manage any applications on any cloud or server.	2,011	11-50 employees	$1M - $5M	-97
9	RealVNC	IT & Security	RealVNC is a provider of remote access solutions including RealVNC Connect for secure, reliable access to desktop and mobile devices, and RealONE, a tool integrating remote management and monitoring capabilities for IT systems.	2,002	51-200 employees		+177
10	Bespin Labs	IT & Security	Bespin Labs offers Google Workspace management solutions, enhancing user lifecycle management and data administration for organizations.	2,010	51-200 employees		+427
11	ScreenCloud	IT & Security	Screencloud is a digital signage software platform that allows users to effortlessly create, manage, and display content on any screen using hardware, an internet connection, and a ScreenCloud account.	2,015	51-200 employees		+102
12	RotaCloud	IT & Security	RotaCloud is software for managing staff schedules, attendance, and HR processes. It enables organizations to plan shifts, manage time off, and handle administrative tasks through a cloud-based platform. The tool is designed for various industries and includes features to streamline scheduling, automate timesheets, and provide HR management functionalities.	2,013	51-200 employees		-158
13	Yoti	IT & Security	Yoti is a platform that allows individuals to securely share personal information with businesses and organizations.	2,014	201-500 employees	$25M - $50M	+190
14	Zadarma	IT & Security	Zadarma is a telecommunications service that provides VoIP, virtual phone numbers across various countries, and PBX systems through a cloud-based platform. The service allows for the setup of a phone system without the necessity of physical lines or hardware, featuring functionalities such as call forwarding, interactive voice response (IVR), and call recording. It also includes CRM system integra	2,006	51-200 employees		-37
15	Virtually There	IT & Security	Virtually There is a platform that offers virtual office services, including business addresses and mail handling, as well as call answering solutions such as virtual receptionists and personal assistants.	2,011	11-50 employees
16	OSINT Industries	IT & Security	OSINT Industries provides a platform that supports open-source intelligence by enabling searches through over 200 websites using email or phone information. It aims to assist sectors like enterprise, government, journalism, and non-profits with investigative capabilities. The platform focuses on trust, safety, and compliance with privacy policies.	2,023	11-50 employees
17	Quackr.io	IT & Security	Quackr.io is a platform that enables users to access temporary phone numbers for receiving SMS messages. The platform provides phone numbers from various countries, which users can use to receive SMS messages through the website. This functionality allows for SMS verification processes that do not require the use of personal phone numbers.	2,019	2-10 employees
18	TTNC	IT & Security	TTNC provides cloud-based telecommunications services including virtual phone numbers, VoIP, SMS, call tracking, fax, and an online control panel (“myTTNC”) for managing those services. Their platform allows businesses to buy, configure, and manage voice, SMS, and number routing services via web interfaces.	2,004	11-50 employees
19	Virtual Landline	IT & Security	Virtual Landline is a service offering virtual phone numbers and VoIP solutions, allowing users to make and receive calls through desktop and mobile apps or VoIP handsets.	1,996	11-50 employees		-608
20	Prism Infosec	IT & Security	PrismInfosec is a platform that provides cybersecurity services and solutions, including penetration testing, cybersecurity consulting, compliance assessment, and training programs. It aims to help organizations identify vulnerabilities within their IT infrastructure, applications, and processes by conducting assessments and simulations of cyber attacks. The platform offers strategic advice, pract	2,006	51-200 employees
21	Hack The Box	IT & Security	Hack The Box is a cloud-based platform offering over 1,200 hands-on cybersecurity labs and training scenarios for corporate teams to enhance skills in offensive and defensive security.	2,017	201-500 employees	$50M - $100M
22	Symprex	IT & Security	Symprex is a platform that centralises the management of email signatures, disclaimers, mailbox permissions, and automatic replies across Microsoft 365, Office 365, and Exchange environments.	1,999	11-50 employees
23	Usecure	IT & Security	Usecure is a platform that helps organizations manage and improve employee cybersecurity awareness. Using automation, it measures, boosts, and monitors cyber awareness levels with minimal administrative effort. The platform focuses on addressing human-related cybersecurity risks, offering targeted training and continuous monitoring to create a security-aware workplace culture	2,016	11-50 employees
24	Onfido	IT & Security	Onfido provides a digital identity verification solution that helps businesses confirm the identities of their customers online. It uses artificial intelligence to automate the verification process, which includes document and biometric checks, ensuring compliance with global regulations such as KYC and AML. The platform aims to enhance customer onboarding, reduce fraud, and simplify regulatory co	2,012	501-1,000 employees	$100M - $250M
25	Total AV	IT & Security	TotalAV is an antivirus program offering malware detection and a range of security features. It offers real-time malware detection, web security features, and various data privacy protections. TotalAV provides protection against malicious programs and other online threats, working to ensure the safety of users and their families, especially during activities like online shopping, thereby safeguard	2,016	51-200 employees	$1M - $5M
26	Soho66	IT & Security	Soho66 is a cloud-based business phone system provider offering virtual landlines, mobile and fax numbers, and a range of call management features.	2,007	11-50 employees
27	CCleaner	IT & Security	CCleaner is a utility platform designed for Windows, macOS, and Android operating systems. Developed by Piriform, it serves the purpose of cleaning and optimizing the computer's operating system and applications. The platform achieves this by removing temporary files, unused files, and other unnecessary data, potentially leading to the freeing up of storage space and improvements in system perform	2,004	Self-employed
28	Egress	IT & Security	Egress is a software company providing an Intelligent Email Security Suite, which includes products like Egress Defend, Egress Prevent, and Egress Protect. These tools are designed to protect against phishing attacks, prevent email breaches, and secure encrypted emails.	2,007	201-500 employees	$25M - $50M
29	Press Loft	IT & Security	Press Loft is a PR-focused platform that hosts digital press offices featuring high-resolution images, releases, and trend content. Brands upload media and press materials, making them instantly accessible to a curated network of journalists, bloggers, and influencers. The platform streamlines media outreach, facilitates collaborations, automates press coverage workflows, powers influencer engagem	2,006	11-50 employees
30	mSpy	IT & Security	mSpy is a monitoring application that enables users to track activities on smartphones and computers. It allows monitoring of calls, text messages, social media interactions, GPS locations, and more, operating discreetly on the target device.	2,003	51-200 employees
31	Red Sift	IT & Security	Red Sift is a cloud-based solution for configuring and managing DMARC, DKIM, and SPF protocols to protect against phishing and business email compromise (BEC) attacks. It includes built-in tools for email analysis, dynamic protocol management, and MTA-STS, ensuring effective email security and reputation management.		1,001-5,000 employees
32	Fixed.net	IT & Security	Fixed.net is a WordPress and WooCommerce maintenance agency operating globally from offices in London, Sofia, and Bali. They offer ad-hoc website fixes as well as ongoing hosting, support, security updates, backups, and performance audits.	2,018	11-50 employees
33	Quatrix	IT & Security	Quatrix is a managed cloud file transfer solution that automates secure file sharing, supports files of any size, and ensures compliance with GDPR and HIPAA.	2,006	501-1,000 employees
34	Sophos	IT & Security	Sophos is a provider of comprehensive endpoint security solutions, including malware detection, exploit protection, and response capabilities (EDR, XDR). The products are managed via a single dashboard in Sophos Central and aim to secure endpoints, servers, and mobile devices across various operating systems.	1,985	5,001-10,000 employees	$50M - $100M
35	Academia	IT & Security	Academia is a platform offering IT solutions and services tailored for the education, public, and business sectors. Their platform includes tools for managing software subscriptions, infrastructure, cloud services, and cybersecurity.	2,003	51-200 employees
36	Server Density	IT & Security	Server Density provides cloud-based infrastructure monitoring and server monitoring solutions to help businesses monitor their IT infrastructure, servers, and applications in real-time.	2,009	11-50 employees	$1M - $5M
37	CultureAI	IT & Security	CultureAI is a Risk Management Platform . The platform is designed to help organisations take a data-driven approach to human risk management that sees employees preventing security incidents rather than creating them. CultureAI's cyber security awareness platform can be used to surface employee security behaviour data and use it to drive personalised security coaching, technical interventions and	2,015	11-50 employees	$10M - $25M
38	Defense.com	IT & Security	Defense.com is an XDR (Extended Detection and Response) platform that offers comprehensive cyber threat detection and response capabilities across the entire network.	2,023	51-200 employees
39	Setyl	IT & Security	Setyl is a cloud-based IT management platform that centralizes asset tracking, license management, and compliance monitoring, integrating with existing systems and supporting unlimited assets.	2,020	11-50 employees
40	DataPlicitiy	IT & Security	DataPlcitiy provides a service for remotely accessing and managing Raspberry Pi devices over the internet.	2,008	51-200 employees
41	Doordeck	IT & Security	Doordeck is an access control aggregator. As a SaaS solution Doordeck enables NFC keyless entry for any access control system.	2,015	2-10 employees
42	AppCheck NG	IT & Security	AppCheck provides a cloud-based vulnerability scanning platform that identifies security vulnerabilities across websites, applications, networks, and cloud infrastructure. The platform performs automated scans to detect security risks and help organizations monitor and manage system vulnerabilities.		51-200 employees
43	Babble	IT & Security	Babble Cloud provides cloud communications and IT services for businesses. The company offers products and services related to voice communications, connectivity, and managed technology services.	2,001	201-500 employees	$5M - $10M
44	Jigsaw24	IT & Security		1,992	201-500 employees
45	SOAX	IT & Security		2,019	51-200 employees
46	IPXO	IT & Security		2,021	51-200 employees	$1M - $5M
47	Qloaked	IT & Security
48	Trusted Proxies	IT & Security		2,010	2-10 employees
49	PrivateProxy	IT & Security		2,017	11-50 employees
50	Regery	IT & Security			11-50 employees
51	Europe Registry	IT & Security
52	Lycamobile	IT & Security			5,001-10,000 employees
53	Cyber Vigilance	IT & Security		2,018	11-50 employees
54	Plusnet	IT & Security		1,997	1,001-5,000 employees
55	Cable Monkey	IT & Security
56	Krystal	IT & Security		2,002	51-200 employees
57	Air Landline	IT & Security			2-10 employees
58	NetNerd	IT & Security		2,018	11-50 employees
59	VoIPcloud Wholesale	IT & Security		2,008	11-50 employees
60	Ping Technology Labs	IT & Security		2,020	2-10 employees
61	Primed Proxies	IT & Security		2,020	2-10 employees

The complete list is available as <a href="/api/export/startups/united-kingdom/it-and-security.csv">CSV</a> or <a href="/api/export/startups/united-kingdom/it-and-security.json">JSON</a>.

IT & Security Software subcategories in United Kingdom

Other companies in United Kingdom

Intruder — Intruder is a platform that offers continuous vulnerability management and attack surface monitoring, making it easy for companies to secure their systems. The product helps businesses address the problem of ensuring the security of their IT infrastructure and web applications.
PortSwigger — PortSwigger products help to secure the web and speed up software delivery.
CloudM — CloudM is a software company offering solutions for data migration, backup, automation, and archiving for Google Workspace and Microsoft 365. Their main product comprises tools to migrate, backup, automate, and archive data across these platforms.
Zadarma — Zadarma is a telecommunications service that provides VoIP, virtual phone numbers across various countries, and PBX systems through a cloud-based platform. The service allows for the setup of a phone system without the necessity of physical lines or hardware, featuring functionalities such as call f
OSINT Industries — OSINT Industries provides a platform that supports open-source intelligence by enabling searches through over 200 websites using email or phone information. It aims to assist sectors like enterprise, government, journalism, and non-profits with investigative capabilities. The platform focuses on tru
TTNC — TTNC provides cloud-based telecommunications services including virtual phone numbers, VoIP, SMS, call tracking, fax, and an online control panel (“myTTNC”) for managing those services. Their platform allows businesses to buy, configure, and manage voice, SMS, and number routing services via web int
Prism Infosec — PrismInfosec is a platform that provides cybersecurity services and solutions, including penetration testing, cybersecurity consulting, compliance assessment, and training programs. It aims to help organizations identify vulnerabilities within their IT infrastructure, applications, and processes by
Hack The Box — Hack The Box is a cloud-based platform offering over 1,200 hands-on cybersecurity labs and training scenarios for corporate teams to enhance skills in offensive and defensive security.
Symprex — Symprex is a platform that centralises the management of email signatures, disclaimers, mailbox permissions, and automatic replies across Microsoft 365, Office 365, and Exchange environments.
Usecure — Usecure is a platform that helps organizations manage and improve employee cybersecurity awareness. Using automation, it measures, boosts, and monitors cyber awareness levels with minimal administrative effort. The platform focuses on addressing human-related cybersecurity risks, offering targeted t
Soho66 — Soho66 is a cloud-based business phone system provider offering virtual landlines, mobile and fax numbers, and a range of call management features.
CCleaner — CCleaner is a utility platform designed for Windows, macOS, and Android operating systems. Developed by Piriform, it serves the purpose of cleaning and optimizing the computer's operating system and applications. The platform achieves this by removing temporary files, unused files, and other unneces
Red Sift — Red Sift is a cloud-based solution for configuring and managing DMARC, DKIM, and SPF protocols to protect against phishing and business email compromise (BEC) attacks. It includes built-in tools for email analysis, dynamic protocol management, and MTA-STS, ensuring effective email security and reput
Fixed.net — Fixed.net is a WordPress and WooCommerce maintenance agency operating globally from offices in London, Sofia, and Bali. They offer ad-hoc website fixes as well as ongoing hosting, support, security updates, backups, and performance audits.
Quatrix — Quatrix is a managed cloud file transfer solution that automates secure file sharing, supports files of any size, and ensures compliance with GDPR and HIPAA.
CultureAI — CultureAI is a Risk Management Platform . The platform is designed to help organisations take a data-driven approach to human risk management that sees employees preventing security incidents rather than creating them. CultureAI's cyber security awareness platform can be used to surface employee sec
Setyl — Setyl is a cloud-based IT management platform that centralizes asset tracking, license management, and compliance monitoring, integrating with existing systems and supporting unlimited assets.
AppCheck NG — AppCheck provides a cloud-based vulnerability scanning platform that identifies security vulnerabilities across websites, applications, networks, and cloud infrastructure. The platform performs automated scans to detect security risks and help organizations monitor and manage system vulnerabilities.
Jigsaw24
Regery
Europe Registry
Cyber Vigilance
Cable Monkey
Krystal
Air Landline
NetNerd

Network & VPN companies in United Kingdom

Babble — Babble Cloud provides cloud communications and IT services for businesses. The company offers products and services related to voice communications, connectivity, and managed technology services.
SOAX
IPXO
Trusted Proxies
PrivateProxy
Lycamobile
Plusnet
VoIPcloud Wholesale
Ping Technology Labs
Primed Proxies

Infrastructure companies in United Kingdom

StatusCake — StatusCake is a platform that provides uptime monitoring, page speed monitoring, and more. The product offers a suite of monitoring tools that help businesses stay online, drive revenue, and stay ahead of the competition.
Cloud 66 — Cloud 66 provides ops tools for developers to build, deliver, deploy, and manage any applications on any cloud or server.
ScreenCloud — Screencloud is a digital signage software platform that allows users to effortlessly create, manage, and display content on any screen using hardware, an internet connection, and a ScreenCloud account.
RotaCloud — RotaCloud is software for managing staff schedules, attendance, and HR processes. It enables organizations to plan shifts, manage time off, and handle administrative tasks through a cloud-based platform. The tool is designed for various industries and includes features to streamline scheduling, auto
Virtually There — Virtually There is a platform that offers virtual office services, including business addresses and mail handling, as well as call answering solutions such as virtual receptionists and personal assistants.
Virtual Landline — Virtual Landline is a service offering virtual phone numbers and VoIP solutions, allowing users to make and receive calls through desktop and mobile apps or VoIP handsets.
Press Loft — Press Loft is a PR-focused platform that hosts digital press offices featuring high-resolution images, releases, and trend content. Brands upload media and press materials, making them instantly accessible to a curated network of journalists, bloggers, and influencers. The platform streamlines media
Server Density — Server Density provides cloud-based infrastructure monitoring and server monitoring solutions to help businesses monitor their IT infrastructure, servers, and applications in real-time.

Identity & Access (IAM) companies in United Kingdom

Approov — Approov is a mobile security platform that ensures only authorized mobile apps, running on unaltered devices, can access APIs and their cloud-based backend services. It uses runtime application self-protection (RASP) and a challenge-response mechanism to authenticate app integrity, without relying o
Bespin Labs — Bespin Labs offers Google Workspace management solutions, enhancing user lifecycle management and data administration for organizations.
Yoti — Yoti is a platform that allows individuals to securely share personal information with businesses and organizations.
Quackr.io — Quackr.io is a platform that enables users to access temporary phone numbers for receiving SMS messages. The platform provides phone numbers from various countries, which users can use to receive SMS messages through the website. This functionality allows for SMS verification processes that do not r
Onfido — Onfido provides a digital identity verification solution that helps businesses confirm the identities of their customers online. It uses artificial intelligence to automate the verification process, which includes document and biometric checks, ensuring compliance with global regulations such as KYC
Doordeck — Doordeck is an access control aggregator. As a SaaS solution Doordeck enables NFC keyless entry for any access control system.

Endpoint Security companies in United Kingdom

Total AV — TotalAV is an antivirus program offering malware detection and a range of security features. It offers real-time malware detection, web security features, and various data privacy protections. TotalAV provides protection against malicious programs and other online threats, working to ensure the safe
mSpy — mSpy is a monitoring application that enables users to track activities on smartphones and computers. It allows monitoring of calls, text messages, social media interactions, GPS locations, and more, operating discreetly on the target device.
Sophos — Sophos is a provider of comprehensive endpoint security solutions, including malware detection, exploit protection, and response capabilities (EDR, XDR). The products are managed via a single dashboard in Sophos Central and aim to secure endpoints, servers, and mobile devices across various operatin

Rising UK it & security software companies

Virtually There and OSINT Industries show the strongest rank gains over the last 90 days.

Virtually There is the fastest-rising UK it & security software product this quarter.

The oldest is Sophos (founded 1985); the newest, OSINT Industries (2023).

Disclosed funding is led by Onfido ($100M - $250M); 15 of 61 have disclosed a round.

How United Kingdom compares globally

the United Kingdom accounts for 29.3% of the it & security software products tracked globally on Cledara (61 of 208).

The top UK product, Intruder, ranks #25 worldwide in the category.

Frequently asked questions

Who are the biggest UK it & security software companies?

Intruder, OnSecurity and CyberSmart lead the UK it & security software market in 2026, ranked by real adoption among companies on Cledara. Last updated 17 August 2026, 15:36 UTC.

How big is the UK it & security software market?

Within Cledara's dataset of real company purchases, 61 UK it & security software products are in active paid use, led by Intruder. This measures actual adoption — it is not a revenue TAM estimate.

Which UK it & security software companies are growing fastest?

Virtually There and OSINT Industries show the strongest rank gains over the last 90 days among UK products in the category.

Where does this data come from?

From anonymized, aggregated purchasing data across companies that manage their software with Cledara — real payments, not surveys or web traffic. Updated monthly.