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Top Code Review & Technical Audit Companies

An investor about to fund a startup, an acquirer weighing a deal, a CTO inheriting a codebase from an agency that has just been fired: each needs an independent answer to the same question, how sound is this software. Code review and technical audit firms answer it by reading the code, the architecture, the tests, the cloud setup and the delivery process, then reporting risks ranked by severity with a cost to fix. Companies also hire them before a major scale-up, a compliance audit or a decision between refactoring and rebuilding.

Compare firms here on reviewers' seniority in your stack, on a redacted sample report, and on whether the firm stands to gain from recommending a rebuild. Compare verified client reviews alongside pricing and capabilities to find the right partner.

How this list is built

We evaluate companies on verified profile data and published client reviews, so you can choose with confidence. We may earn a fee for some placements. How we rank and verify

List of the Best Code Review & Technical Audits Agencies

  1. SecureCoders logo
    SecureCoders
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    Established in 2010, Secure Coders set out with a clear goal: to provide enterprise-level security solutions to businesses of all sizes. Our founders, who bring decades of experience in cybersecurity, understood that many organizations struggled to develop strong security programs due to resource co

    Highlights

    10-49

    Employees

    Services Provided
    100% Code Review & Technical Audits
    AI Summary

    “SecureCoders, founded in 2010, delivers comprehensive enterprise security services including operations, program leadership, risk management, and secure software development to diverse businesses.”

  2. TrustLayerLabs logo
    TrustLayerLabs
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    TrustLayerLabs is a cybersecurity firm that offers Vulnerability Assessment and Penetration Testing (VAPT) services for web applications, APIs, mobile apps, and cloud systems. We assist both startups and enterprises in uncovering security weaknesses using the OWASP Top 10 and leading industry practi

    Highlights

    $1,000+

    Min Project Size

    $25-49/hr

    Avg Hourly Rate

    2-9

    Employees

    Services Provided
    50% Cybersecurity Assessments & Hardening
    50% Code Review & Technical Audits
    AI Summary

    “TrustLayerLabs specializes in comprehensive cybersecurity services including penetration testing, vulnerability assessments, and security consulting for applications, APIs, networks, and cloud environments to identify and remediate risks.”

  3. AttackIUM logo
    AttackIUM
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    AttackIUM is a consultancy that specializes in offensive security, concentrating on high-impact, research-led security evaluations. Our expertise lies in penetration testing, red teaming, application and API security, cloud security assessments, and in-depth code reviews for contemporary systems. Ou

    Highlights

    $1,000+

    Min Project Size

    $25-49/hr

    Avg Hourly Rate

    2-9

    Employees

    London, England, Gb

    Services Provided
    50% Cybersecurity Assessments & Hardening
    50% Code Review & Technical Audits
    AI Summary

    “AttackIUM is a consultancy specializing in manual, research-driven offensive security assessments including penetration testing, red teaming, application, cloud security, and code reviews to enhance organizational defenses.”

  4. Syed Ahmer Shah logo
    Syed Ahmer Shah
    9 Reviews
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    Syed Ahmer Shah is a Software Engineer and Full-Stack Developer based in Hyderabad, Pakistan , helping startups, growing businesses, and ambitious founders turn ideas into reliable digital products. My work covers custom software, SaaS platforms, web

    Highlights

    $1,000+

    Min Project Size

    $25-49/hr

    Avg Hourly Rate

    2-9

    Employees

    Hyderabad, Sindh, Pk

    Services Provided+27 Services
    10% Software Development Services
    10% Custom Web Application Development
    5% Progressive Web App (PWA) Development
    5% Web App UI Design
    AI Summary

    “No AI summary available for this company yet.”

  5. Simpity logo
    Simpity
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    Simpity is a specialized security engineering firm focusing on low-level software development, Windows internals, and advanced system security. We assist technology companies in creating secure, reliable, and high-performance systems by delving into the internals of operating systems and intricate s

    Highlights

    $100,000+

    Min Project Size

    $25-49/hr

    Avg Hourly Rate

    10-49

    Employees

    Warszawa, Masovian, Pl

    Services Provided
    5% Custom Web Application Development
    45% Code Review & Technical Audits
    50% Operational Process Consulting
    AI Summary

    “Simpity specializes in advanced system security and Windows internals, providing expert reverse engineering, vulnerability research, and secure software development to enhance technology platforms.”

  6. DefenseCode logo
    DefenseCode
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    DefenseCode offers solutions and services aimed at evaluating and testing security vulnerabilities in web, desktop, and mobile applications utilizing Dynamic Application Security Testing (DAST, BlackBox Testing) and Static Application Security Testing (SAST, WhiteBox Testing) technologies. The compa

    Highlights

    10-49

    Employees

    Midleton, Cork, Ie

    Services Provided
    40% QA & Software Testing
    45% Code Review & Technical Audits
    15% Custom Web Application Development
    AI Summary

    “DefenseCode specializes in security assessment and consulting, offering advanced application vulnerability testing and research services to diverse global industries since 2010.”

  7. Scale Converge logo
    Scale Converge
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    Scale Converge is an SEO company focused on helping businesses improve their search visibility, attract relevant traffic, and generate qualified leads through strategic and result-driven SEO. With 15 years of experience and work across 10+ countries, Scale Converge brings a global perspective to

    Highlights

    $1,000+

    Min Project Size

    < $25/hr

    Avg Hourly Rate

    10-49

    Employees

    Ghaziabad, Uttar Pradesh, In

    Services Provided
    60% Search Engine Optimization (SEO)
    20% Content Marketing Strategy
    20% Code Review & Technical Audits
    AI Summary

    “No AI summary available for this company yet.”

  8. Software Secured logo
    Software Secured
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    Our comprehensive penetration testing, combined with our unique testing framework, ensures a thorough assessment. Consolidate various security initiatives in one location using Portal, an online reporting dashboard that enables you to oversee tests, monitor SLAs, download reports, and track your sec

    Highlights

    $5,000+

    Min Project Size

    10-49

    Employees

    Ottawa, Ontario, Ca

    Services Provided+2 Services
    7% AI Strategy & Roadmap Consulting
    5% AI Model Fine-Tuning & Training
    4% AI Agent & Multi-Agent System Development
    18% Other IT Consulting and SI
    AI Summary

    “Software Secured offers comprehensive penetration testing and continuous security monitoring through PTaaS, with a unique reporting portal, focusing on SaaS applications and DevSecOps integration.”

  9. Instigate Design CJSC logo
    Instigate Design CJSC
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    With more than 20 years in the EDA and semiconductor sectors, Instigate Design offers comprehensive design and verification services aimed at accelerating innovation for technology companies. We collaborate with industry leaders and global innovators to provide high-quality, scalable solutions in AS

    Highlights

    $50,000+

    Min Project Size

    $50-99/hr

    Avg Hourly Rate

    50-249

    Employees

    Yerevan, Am

    Services Provided
    10% Custom Web Application Development
    35% Backend Development
    15% Frontend Development
    40% Code Review & Technical Audits
    AI Summary

    “Instigate Design CJSC delivers expert ASIC, FPGA, SoC, and embedded system design and verification services, ensuring quality, scalability, and timely project delivery for global tech innovators.”

  10. DATAMI logo
    DATAMI
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    Datami is a comprehensive cybersecurity firm dedicated to safeguarding critical digital assets for over 11 industries, including fintech, banking, healthcare, military, e-commerce, technology, and web3. With more than 8 years of experience and a team of over 50 professionals, we have successfully su

    Highlights

    $1,000+

    Min Project Size

    $25-49/hr

    Avg Hourly Rate

    50-249

    Employees

    Tallinn, Harju, Ee

    Services Provided+1 Services
    23% Cybersecurity Assessments & Hardening
    7% DevOps Engineering
    4% Managed IT Services
    33% Code Review & Technical Audits
    AI Summary

    “Datami is a global cybersecurity firm delivering comprehensive offensive and defensive solutions across industries, ensuring risk mitigation, compliance, and robust digital asset protection with expert services and 24/7 support.”

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Buyer's guide

Hiring Code Review & Technical Audits companies

What the work covers, how to judge a partner and what drives the price.

What code review and technical audit firms examine

A technical audit usually covers architecture and scalability, code quality and maintainability, test coverage and reliability, security, infrastructure and deployment, data handling, and the team's process. Reviewers combine static analysis with tools such as SonarQube, dependency and license scanning, secrets detection and SAST, with manual reading of critical paths: authentication, payments, data access and anything the business depends on. Security findings are mapped to the OWASP Top 10 or ASVS, and open source licenses are checked for GPL or other obligations that matter in a sale.

The deliverable is a written report and a readout: an executive summary, findings with severity and evidence, a technical debt register with effort estimates, and a remediation roadmap. Due diligence reports add a view on team capability, key-person risk and whether the product can support the business plan.

Engagements include a one-off audit, investor or M&A due diligence on a deal timeline, a pre-launch security and quality review, and ongoing code review where senior engineers review pull requests for an internal team.

Chapter 1 of 3
FAQ

Code Review & Technical Audits FAQs

Short answers to what buyers ask before hiring a Code Review & Technical Audits company.

Question not covered? Ask our team

A code review and technical audit examines architecture, code quality, tests, security, dependencies and licenses, infrastructure, deployment and team process. It combines automated analysis with manual review of critical code paths and ends in a report with findings ranked by severity, a technical debt register and a remediation roadmap, presented in a readout.

A code audit is usually a fixed fee based on codebase size, repositories, services and the areas covered, with due diligence priced per deal and ongoing review on retainer. Manual depth, security testing and turnaround raise the price. Most firms in this listing set a minimum project of $1,000 to $10,000, with a large group starting at $25,000.

A code audit judges how the software is built; QA and software testing checks whether it behaves correctly. Auditors read code, architecture and infrastructure to find maintainability, scalability and security risks. QA testers run the application, write and execute test cases, and report defects. An audit often recommends better test coverage, which a QA team then delivers.

Technical due diligence is a code and technology review commissioned by an investor or acquirer before a deal closes. It assesses whether the software can support the business plan, what technical debt and security risk it carries, licensing exposure, and the strength of the engineering team. The findings shape valuation, deal terms and the post-deal plan.

The timeline is set by codebase size, the areas in scope and how quickly the team grants access and answers questions. Phases are scoping, access setup, automated analysis, manual review, developer interviews, report writing and readout. Missing documentation, slow access approvals and unavailable original developers are what extend it.

Firms in this listing most often audit software for information technology, financial services, healthcare, ecommerce, business services, education and consumer products companies. Financial services and healthcare buyers need security and compliance depth; ecommerce teams focus on performance and payment flows; investors across sectors commission due diligence before funding rounds and acquisitions.

The largest groups of code review firms on this page are in Warsaw, Ahmedabad, London, New York and Kyiv, with Lahore, Lviv and Bucharest close behind. Poland, Ukraine and Romania supply many senior engineers who audit remotely; London and New York firms are often chosen for investor due diligence close to the deal team.

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