Source Code Review Providers
Source code review (also known as secure code review or code audit) is a systematic examination of an application's source code to identify security vulnerabilities, coding errors, and deviations from secure coding practices. Manual code review by experienced security engineers is combined with static application security testing (SAST) tools to analyse code for vulnerabilities including injection flaws, authentication weaknesses, cryptographic errors, insecure data handling, race conditions, and logic flaws.
Code review covers multiple programming languages and frameworks, examining both custom code and the use of third-party libraries and dependencies. This white-box approach finds vulnerabilities that black-box testing cannot detect, such as backdoors, insecure cryptographic implementations, and subtle logic errors.
Source code review is particularly valuable during the software development lifecycle (SDLC) as it allows vulnerabilities to be identified and fixed early, when remediation costs are lowest. It is recommended by compliance frameworks including PCI DSS, SOC 2, and NIST, and is essential for organisations developing security-critical applications, financial systems, healthcare platforms, and government software.
SECFORCE
Canary Wharf-based adversary simulation and CBEST-aligned penetration testing consultancy, delivering CREST-accredited offensive security to UK financial services and other organisations with the most demanding requirements.
MDSec
Elite UK offensive security consultancy specialising in CBEST/STAR/TIBER red teaming, advanced adversary simulation, and CREST-accredited penetration testing for FTSE 100 clients.
Salus Cyber
Award-winning Cheltenham-based cybersecurity consultancy with NCSC CHECK Green Light status and CREST approval, specialising in defence, government, and critical national infrastructure security.
Thales Cyber Solutions
Cybersecurity division of the Thales Group, with ANSSI, CREST, FedRAMP 3PAO, and NATO-cleared personnel. Defence, government, and critical infrastructure penetration testing worldwide.
GuidePoint Security
US-headquartered cybersecurity consultancy with 800+ employees, serving ~40% of the Fortune 500. FedRAMP 3PAO, PCI QSA, and HITRUST accreditations.
Raxis
US penetration testing firm founded in 2011, running 600+ engagements a year with a fully remote, US-based team. Manual, expert-led testing across web, network, cloud, mobile, wireless, OT/ICS, and AI/LLM. Gartner Sample Vendor for PTaaS.
Bishop Fox
Tempe, Arizona-headquartered offensive security firm and Black Hat / DEF CON regulars, makers of the Cosmos continuous attack surface management platform.
usd AG
Frankfurt-based European payment security specialist holding the full set of PCI credentials (QSA, PFI, ASV, P2PE). Manual-first penetration testing for fintechs, acquirers, and regulated enterprises.
Kroll
Global risk advisory firm with a 400+ person cyber practice. IR-led penetration testing that feeds active breach intelligence straight into test scoping.
The Missing Link
Sydney-headquartered Australian cybersecurity firm founded in 1997, now part of Infosys. CREST-approved with OSCP, OSCE, and OSEE-certified testers.
SEC Consult
Vienna-headquartered Austrian cybersecurity consultancy with a prolific Vulnerability Lab research program and deep expertise in IoT and embedded systems security across the DACH region.
Source Code Review FAQs
What programming languages can be reviewed?+
Professional code reviewers typically cover Java, C#, Python, JavaScript/TypeScript, Go, Ruby, PHP, C/C++, Swift, Kotlin, and other common languages. Specialist reviewers may cover embedded systems languages and proprietary platforms.
How is source code review different from automated SAST?+
Automated SAST tools find common patterns but produce false positives and miss complex logic flaws. Manual review by experienced engineers finds subtle vulnerabilities, validates automated findings, and assesses overall code quality.
How long does a source code review take?+
Duration depends on codebase size, complexity, and languages used. A focused review of critical components typically takes 5-15 days. Full application reviews of large codebases may take several weeks.