CREST-Accredited Secure Code Review for UK Businesses
Secure code review combines manual expert review with automated SAST tooling. We support Java, Python, JavaScript, TypeScript, Go, C#/.NET, Ruby, PHP, Rust, Kotlin, and Swift. Aligned to OWASP ASVS, OWASP Top 10, OWASP API Top 10, and CWE Top 25. ISO 27001 Annex A.14.2 secure development evidence.
- Unlimited retesting
- Unlimited pre-retesting
- No hidden fees
“I would highly recommend EJN Labs to any organisation seeking reliable, detailed, and well-managed penetration testing services, particularly for government or enterprise-level projects.”
Imran SaghirProject Lead, SquareOne“There wasn’t another company we could find that could deliver what we needed in the timeframe we needed. The client loved it, and we got instant ROI from the engagement.”
Dan WilcocksonCo-Founder, Celloriof vulnerabilities found in production were introduced in code that passed automated SAST. Manual review catches what tools miss.
SAST tools find patterns. Code reviewers find logic.
Modern SAST tools (Snyk, Semgrep, SonarQube, Veracode, Checkmarx) catch known patterns: SQL injection sinks, hardcoded credentials, deprecated crypto. They cannot tell you whether your authorisation logic correctly enforces tenant boundaries, whether your race-condition-prone payment endpoint can be exploited, or whether your custom JWT validation has a subtle signature-bypass flaw.
Our secure code review combines automated SAST tooling for breadth (Semgrep, CodeQL, language-specific tools) with manual expert review for depth (authorisation logic, business-logic flaws, race conditions, custom crypto). Reports map to OWASP ASVS levels (L1, L2, L3), CWE Top 25, OWASP Top 10, and OWASP API Top 10.
Findings ship with example patch code, not just abstract recommendations. Reports satisfy ISO 27001 Annex A.14.2 secure development requirements.
CODE REVIEW LANGUAGES + COVERAGE
What Secure Code Review Covers
Manual review by language-specialist consultants. Automated SAST baseline. Aligned to OWASP ASVS L1/L2/L3 verification levels.
Java & Kotlin
Spring Boot, Jakarta EE, Android, JVM frameworks. JNDI, deserialization, Spring Security, JWT validation, race conditions in concurrent code.
Python
Django, Flask, FastAPI, async patterns. Template injection, pickle deserialization, SQL injection in ORMs, OAuth flow validation.
JavaScript & TypeScript
Node.js, Express, Nest, Next.js, React, Vue. Prototype pollution, ReDoS, npm supply chain, JWT verification, server-side request forgery.
Go
Gin, Echo, Fiber, gRPC. Race conditions in goroutines, deserialization, custom crypto, context-handling timeout / cancel-token misuse.
C# / .NET
ASP.NET Core, MVC, Entity Framework. Deserialization, identity / authorisation flaws, JWT validation, SignalR security.
Ruby & Rails
Mass assignment (strong parameters), template injection, pickle / Marshal deserialization, ActiveRecord SQL injection patterns.
PHP
WordPress / Drupal / Magento extension review, deserialization (phpggc), SQL injection in PDO, OAuth flows, file-upload validation.
Rust
Memory safety (despite the language): unsafe blocks, panic-prone code, dependency review (cargo-audit), serde deserialization.
Swift & Objective-C
iOS app code review (use Mobile Pen Testing for runtime). Memory management, Keychain usage, certificate pinning code.
Smart Contracts
Solidity, Vyper, Move, Cairo (use Smart Contract Audit page for full DeFi engagement). Code-review-only engagements available.
OWASP ASVS Verification
L1 (basic), L2 (standard), L3 (advanced). Each finding pre-mapped to ASVS verification ID. Audit-grade evidence pack.
SAST Tool Integration
Semgrep, CodeQL, Snyk, SonarQube, Checkmarx, Veracode integration. Existing tool tuning and false-positive reduction.
Dependency & Supply Chain
npm / pip / Maven / NuGet / Cargo dependency review. CVE matching, suspicious packages, abandoned maintainers, typosquats, and dependency-confusion risk.
FOUR-PHASE METHODOLOGY
Secure Code Review: From Codebase to ASVS Evidence
Manual + automated combined. OWASP ASVS verification level assigned. Findings shipped with example patch code.
Codebase Walkthrough
Initial walkthrough with engineering team. Architecture review, dependency audit, threat-model alignment, scope agreement.
Automated SAST Baseline
Language-specific SAST tools run (Semgrep, CodeQL, Snyk, SonarQube). Findings de-duplicated, false positives filtered, baseline established.
Manual Expert Review
Manual review by language-specialist consultant. Authorisation logic, business-logic flaws, race conditions, custom crypto, integration assumptions.
Report & Patch Examples
OWASP ASVS-mapped findings, CVSS scoring, example patch code per finding. Free retest within 30 days. Direct engineer access via portal.
CREDENTIALS
Verified Accreditations Auditors Accept
Every credential below is independently verifiable. UK procurement teams, FCA supervisors, ISO 27001 / SOC 2 auditors, and cyber insurance underwriters all recognise these standards.
GET YOUR QUOTE
Get a fixed Code Review quote in 24 hours
A fixed-price quote back in one business day, from a named CREST assessor. No sales pipeline, no chasing.
- CREST and IASME accredited. Testing your auditors and clients already recognise.
- Fast-track testing within 24 hours where required. Free retest of every fix included.
- Live findings via your client portal, not a four-week PDF.
- Fixed price from £3,500 for a single-role, single-app scope, agreed up front. Most engagements run £5,000 and up. No day-rate surprises.
Dan WilcocksonCo-Founder, CelloriUnder NDA Further named references available on a scoping call.
- We reply within one business day with a fixed-price quote from a named CREST assessor.
- You approve the scope and we book a start date, usually within 24 hours.
- Live findings land in your client portal as we test, with a free retest of every fix.
Get your fixed Code Review quote in 24 hours
Quote request received
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COMPLIANCE READY
Code Review Reports Mapped to Every Framework
Secure development evidence accepted across compliance frameworks where source-code-level review is a control requirement.
ISO 27001 A.14.2
Security in development and support processes: secure code review is core evidence for A.14.2.1 secure development policy.
OWASP ASVS L1/L2/L3
Application Security Verification Standard: findings tagged to specific ASVS verification IDs for direct submission to audit teams.
SOC 2 Type II
CC7.1 vulnerability identification at the source-code layer. CC8.1 change management evidence: code review is a documented change control.
PCI DSS Req 6.5
Secure development requirements: Req 6.5.1 through 6.5.10 specifically mandate manual review of common vulnerability classes.
NCSC Secure Development
UK government Secure Development guidance for application security: code review is the foundational control.
NIS2 + DORA
Application-layer secure development evidence for essential services and financial entities. ISO 27001 A.14.2 alignment satisfies both.
PRICING
Transparent Secure Code Review Pricing
All tiers include the same depth of review. Price varies by lines of code, language count, framework breadth, and ASVS verification level.
Depends on LOC and language count
Single module (up to 10,000 LOC, one language). ASVS L1/L2 baseline. Typically 3-5 day engagement.
Get a fixed quoteDepends on LOC and language count
Full application (10,000-50,000 LOC, 2-3 languages). ASVS L2 standard. Typically 7-12 day engagement.
Get a fixed quoteDepends on LOC and language count
Enterprise polyglot (50,000+ LOC, microservice mesh, ASVS L3). Typically 12-20+ day engagement.
Get a fixed quoteBY SECTOR
Secure Code Review for Your Sector
Different sectors have different language stacks and threat models. We tailor code review to your environment.
Fintech & FCA-Regulated
FCA-regulated firms, Open Banking, payment APIs, PCI scoping.
Fintech sector pageSaaS Companies
Multi-tenant isolation, SSO/SAML/OIDC, customer-data perimeter, SOC 2 evidence.
SaaS sector pageLaw Firms
Privileged-data confidentiality, partner-tier scrutiny, SRA Cyber Standard alignment.
Law firm sector pageHealthcare
NHS DSPT, NHS DTAC, EHR integration, telehealth, patient-data PII.
Healthcare sector pageInsurance
FCA / PRA Operational Resilience, claims data, broker integrations, cyber underwriting evidence.
Insurance sector pagePublic Sector
CCS / G-Cloud framework, NCSC-aligned, SC-cleared testers available.
Public sector pageWHY EJN LABS
What You Actually Get
Six concrete differentiators competitors don’t all match.
What You Get From Secure Code Review
Manual + automated SAST review, language-specialist consultants, OWASP ASVS-mapped findings, example patch code, free retest within 30 days.
Manual + Automated Combined
SAST tools for breadth, manual expert review for depth. Language-specialist consultants for the specific framework / library / pattern your codebase uses.
OWASP ASVS L1/L2/L3 Aligned
Findings pre-mapped to ASVS verification IDs. Audit-grade evidence pack ready for ISO 27001, SOC 2, PCI DSS submission.
Patch Examples Included
Every finding ships with example patch code in your language. Engineers fix faster. Your security team has reference material.
Free Retests Within 30 Days
Free retest within 30 days of report delivery. Both automated SAST re-run and manual review of remediated code. No additional engagement fee.
UK CREST + IASME + ISO 27001 + ISO 9001
Independently accredited. UK-based language-specialist consultants. Reports accepted by every UK auditor.
FAQ
Frequently Asked
What is secure code review?
Secure code review is the manual + automated review of source code for security vulnerabilities. It catches issues that runtime testing (pen testing) cannot, particularly authorisation logic flaws, business-logic vulnerabilities, race conditions, and custom cryptography. Aligned to OWASP ASVS verification levels (L1, L2, L3).
How is code review different from pen testing?
Pen testing is black-box / runtime: finds vulnerabilities reachable from outside. Code review is white-box / source-level: finds vulnerabilities at any depth, including those that aren’t reachable through normal application use. Use both: pen testing for external attack surface, code review for development-phase assurance.
What languages do you support?
Java, Kotlin, Python, JavaScript, TypeScript, Go, C#/.NET, Ruby, PHP, Rust, Swift, Objective-C. Smart contract languages (Solidity, Vyper, Move, Cairo) are covered in our dedicated Smart Contract Audit. Other languages on request; we maintain language-specialist subcontractor relationships.
How long does code review take?
Single module (up to 10,000 LOC, 1 language): 3-5 working days. Full application (10,000-50,000 LOC, 2-3 languages): 7-12 days. Enterprise polyglot (50,000+ LOC, microservice mesh, ASVS L3): 12-20+ days. Test duration is determined during scoping based on lines of code and complexity.
How much does secure code review cost in the UK?
Focused module £3,500-£7,000. Application (most commonly commissioned) £7,000-£12,000. Enterprise / microservice £12,000-£20,000. UK day rates for CREST + language-specialist consultants are £1,100-£1,400 per day.
What SAST tools do you use?
We tool-up based on language. Semgrep + CodeQL for breadth across most languages. Language-specific: SpotBugs / Find Security Bugs for Java; Bandit for Python; ESLint security plugins for JavaScript; Brakeman for Ruby; gosec for Go. We integrate with your existing tools (SonarQube, Snyk, Checkmarx, Veracode) where deployed.
Will you provide example patch code?
Yes. Every finding ships with example patch code in your language. We don’t just say “use parameterised queries”; we show exactly what the parameterised query should look like in the framework you’re using. Engineers fix faster, your team has reference material.
Can you align to OWASP ASVS L1/L2/L3?
Yes. ASVS verification level is agreed during scoping. L1 (basic) covers automated scanning. L2 (standard) is the typical commercial baseline. L3 (advanced) is for high-assurance applications. Each finding pre-mapped to specific ASVS verification IDs.
Do you review supply chain (dependencies)?
Yes. Dependency / supply-chain review is included. We audit npm / pip / Maven / NuGet / Cargo dependencies for known vulnerabilities (CVE matching), suspicious packages, abandoned maintainers, typosquats, and dependency-confusion risk. Particularly important post-CrowdStrike supply-chain incidents.
Do you do remediation validation (retest)?
Yes. Free retest within 30 days of report delivery. Both automated (SAST re-run) and manual review of remediated code. No additional engagement fee.
Are your reviewers UK-based and what experience do they have?
UK-based language-specialist consultants. Relevant background: production application development experience in their specialist language, plus security certifications (CREST CRT, OSWE for web languages, OSCP). Many also have OWASP project contributor backgrounds.
Do you sign NDAs?
Yes. Standard NDA before any source-code access. We operate under a project-specific master agreement that includes source-code IP protection, post-engagement code destruction, and embargo periods for findings.
20+ CREST-accredited testing services in one place
Web, mobile, API, cloud, AI, infrastructure, red team. Pick the test that fits your environment.
Get a fixed Code Review quote in 24 hours
A CREST-certified language-specialist consultant will contact you within one business day with a fixed price, a realistic timeline, and the named consultant. No sales pipeline.
