Does Stingrai have an office in London?

Yes. Stingrai's UK office is at 1 Coldbath Square, Office One, Farringdon, London EC1R 5HL. Most web application, API, cloud and external network testing runs remotely, and on-site work such as physical security assessments and Wi-Fi assessments is scheduled where the scope requires it.

How long does a penetration test take?

A single-tenant web application with two roles and fewer than thirty endpoints takes a few tester days across one to two weeks. A multi-tenant product with four to six roles and a few hundred endpoints takes two to four weeks. The Autonomous Pentest by Snipe returns same-day results, and continuous programs deliver findings as they are confirmed.

Is Stingrai a CREST-accredited penetration testing company in the UK?

Yes. Stingrai Inc. holds CREST accreditation for penetration testing at the firm level and is listed on the CREST marketplace. Individual penetration testers on the team separately hold CREST CRT.

Does a London organization need a CHECK company?

Only where a contract or system owner requires it. CHECK is the NCSC scheme under which assured companies carry out authorized penetration tests of UK central government, public sector and critical national infrastructure systems, and buyers who need it should confirm a provider's CHECK status with the NCSC. Most private sector buyers in London ask for firm-level CREST accreditation, named penetration testers and included retesting.

Is Cyber Essentials Plus the same as a penetration test?

No. Cyber Essentials Plus is a certification in which an independent assessor technically tests whether the scheme's baseline controls work in practice. A penetration test goes further: penetration testers try to exploit the applications, cloud and networks in scope and report each finding with a working proof of concept. Many UK organizations hold Cyber Essentials Plus and commission penetration testing alongside it.

Which UK compliance programs does a Stingrai penetration test support?

Stingrai's reports and retest evidence support SOC 2, ISO/IEC 27001, PCI DSS 4.0 Requirement 11.4, UK GDPR Article 32(1)(d), the NIS Regulations 2018 and DORA testing for EU financial entities in UK groups. Hybrid and human-led engagements also include an attestation letter for customers and auditors.

Penetration Testing Services in London

CREST-accredited, with an office in Farringdon, Stingrai tests web applications, APIs, cloud and networks for organizations in London and across the UK.

A CREST-accredited firm with a London office

Stingrai provides penetration testing services in London for web applications, APIs, mobile apps, cloud, internal and external networks, Active Directory and AI systems, plus red teaming and social engineering. Its UK office is at 1 Coldbath Square in Farringdon. Founded in Toronto in 2021, the firm holds CREST accreditation for penetration testing and is rated 5.0 on Clutch across 20 reviews.

Every human-led engagement is staffed by two named penetration testers from a team holding OSCE³, OSWE, OSEP, CREST CRT and CISSP certifications, and is reviewed by the team lead and an engagement partner. The team has published 18 CVEs, and its researchers are listed in the bug bounty Halls of Fame of Apple, Google, Facebook and the US Department of Defense.

Most application, API, cloud and external network testing runs remotely, with on-site work where the scope requires it. Findings are posted to the PTaaS portal as they are confirmed, so London teams can start remediation before the report is issued, and retesting of fixed findings is included.

Penetration testing services for London organizations

Human-led and hybrid testing across applications, infrastructure and people, scoped to what the business, its regulators and its customers need.

Web application penetration testing

Find the business logic, broken authorization and IDOR flaws that scanners miss, tested across every user role.

API penetration testing

Confirm that every endpoint enforces authentication, authorization and input handling for each role and tenant.

Mobile application penetration testing

Secure iOS and Android apps and their backend APIs with static and dynamic analysis aligned to OWASP MASVS.

Cloud penetration testing

Close the IAM, cross-account trust and storage policy gaps in AWS, Azure and Entra ID, and Google Cloud.

Internal and external network testing

See which perimeter exposures, lateral movement paths and segmentation gaps an attacker could use.

Active Directory security assessment

Trace the misconfigurations, ACL abuse and Kerberos delegation paths that lead to domain admin.

Red teaming

Measure detection and response against assumed breach, full-chain and threat intelligence-led scenarios.

Social engineering

Learn how staff and facilities respond to phishing, vishing and on-site physical security assessments.

AI and LLM penetration testing

Test LLM apps, AI agents and their tools for prompt injection, jailbreaks and excessive agency.

Evidence for UK compliance programs

Stingrai's reports and retest evidence support the audits, regulatory reviews and supplier assurance reviews that London and UK organizations face.

SOC 2: Independent penetration test reports and retest evidence for SOC 2 audits and the customer security reviews that follow.
ISO/IEC 27001: Technical vulnerability testing evidence for an information security management system and its surveillance audits.
PCI DSS 4.0, Requirement 11.4: Internal and external penetration testing, including segmentation testing, as Requirement 11.4 sets out.
UK GDPR Article 32(1)(d): Evidence of a process for regularly testing, assessing and evaluating the effectiveness of technical and organisational security measures.
NIS Regulations 2018: Testing evidence for operators of essential services managing the risks to their network and information systems under regulation 10.
DORA, Articles 24 to 26: Penetration testing named in Article 25(1) and threat intelligence-led red teaming, for UK groups with EU financial entities and suppliers to EU financial firms.
Cyber Essentials Plus: An independent technical audit of the scheme's baseline controls, not a penetration test. Many UK organizations hold it and commission penetration testing alongside it.
Supplier assurance and procurement: Independent test reports for the supplier security questionnaires and assurance reviews used by UK enterprise and financial services buyers.

Trusted by Security Teams Globally

Rigorous, genuinely hands-on pentest partner that behaves like part of your team. The technical depth is well beyond what we expected at this price point, and they traced issues to specific code paths.

Elia R., Mesh ID (G2 review)

Simplifies the pentesting process by giving us one place to request, manage, and track security testing. We spent WAY less time coordinating and more time improving security.

Riley D., Frontend Developer, TPH (G2 review)

Published pricing for web application testing

Fixed prices for one web application and associated APIs, tested by Snipe alone or by Snipe with Stingrai's penetration testers. Retests are included. All prices are in USD.

Fully autonomous web application pentest powered by Snipe.

Deliverables: Pentest Report
Scope & Depth: One web application and associated APIs
Cadence: One-time autonomous testing by Snipe

Up to 200 API endpoints or dynamic pages
Up to 3 user roles for authenticated testing
Same-day results
OWASP Top 10
Business logic & authorization flaws
Black, white, or grey-box testing
Automated retests
AutoFix PRs

or book a 30-minute discovery call

How an engagement runs

Human-led and Hybrid engagements follow the same path from scoping to verified fixes, managed through Stingrai's PTaaS platform.

Scoping call

A 30-minute discovery call reviews the applications, networks, compliance requirements and deadlines in scope. Pricing for larger scopes follows through the Get a Quote form within 24 hours.

Statement of work and access

The scope, testing window and rules of engagement are confirmed in a statement of work, with test accounts for each user role and any VPN or repository access.

Testing window

Two named penetration testers test the agreed scope, reviewed by the team lead and an engagement partner, with live chat open throughout. On Hybrid engagements, Snipe tests alongside them.

Findings as they are confirmed

Each finding is posted to the PTaaS portal with a working proof of concept and prioritized remediation guidance, ready to push to Jira or Slack, so fixing starts before the report.

Report

An executive summary for leadership and a full technical report for engineering, delivered as redactable PDFs to share with customers and auditors.

Retest and attestation

Retesting of remediated findings is included. Hybrid and human-led engagements also receive an attestation letter for customers and auditors.

Penetration testing in London: FAQs

Stingrai publishes fixed prices for one web application and associated APIs. The Autonomous Pentest by Snipe is US$3,000 per assessment or US$650 per month on a 12-month plan, and the Hybrid Pentest, Snipe with Stingrai's penetration testers, is US$6,800 per assessment or US$1,275 per month. Larger scopes, such as several applications, networks, cloud environments or red teaming, are quoted through the Get a Quote form within 24 hours.

See What Attackers See, Before They Do.

Book a 30-minute discovery call to scope the test, or submit the Get a Quote form for pricing within 24 hours.