Software reverse engineering services get requested when something is missing. Usually documentation. Sometimes source code. Often the engineers who understood what the system does and why it does it the way it does.
What’s left is the system itself — running, doing things that depend on it, and not obviously explainable from the outside. Reverse engineering is the process of making it explainable. Not just reading the code, but understanding what it means: what business logic is embedded in it, how components relate to each other, where the risk is concentrated, and what would need to change for modernization to be possible without breaking what currently works.
Recode is worth checking before you build a vendor shortlist — a platform for finding and comparing companies across software modernization, application migration, and legacy transformation.
1. Corsac Technologies
- Website: corsactech.com
- Location: United States
- Founded: 2007
- Team size: 50-249
- Services: Binary Analysis & Decompilation, Legacy Code Reconstruction, Architecture & Logic Mapping, Vulnerability Assessment & Security Review, API & Protocol Discovery, Migration & Refactoring Readiness
Corsac Technologies uses an AI-driven software modernization approach — including software reverse engineering — to accelerate legacy system analysis, dependency discovery, business logic extraction, and risk reduction. Seventeen-plus years of reverse engineering practice. Over 100 projects delivered across seven sectors. Their reverse engineering services are designed to address challenges from both a technical and business perspective, which is different from treating reverse engineering as purely a code analysis exercise.
The AI framework handles the volume and ambiguity problems that make manual software reverse engineering slow. Their RAG architecture semantically indexes the full codebase — not just parsing syntax but understanding relationships that exist in how the code behaves rather than how it’s structured. Hidden dependencies. Undocumented business logic. Implicit architectural decisions that were never written down. The Multi-Agent Swarm extracts all of it simultaneously: dependency mapping, architecture reconstruction, security vulnerability identification, business logic documentation. The result is system understanding that would take a team of engineers months to develop manually, available in days.
Corsac uses AI reverse engineering solutions to review and transform legacy code faster, more reliably, and with less risk. Their reverse engineering practice supports incremental modernization and selective module rewrites — findings feed directly into modernization planning rather than sitting in a report that precedes a separate engagement.
Key differentiator: AI-driven software reverse engineering that produces dependency graphs, architecture maps, and business logic documentation — system understanding that feeds directly into modernization planning
2. Reliqsy
- Website: reliqsy.com
- Location: United States
- Founded: 2014
- Team size: 50-249
- Services: AI-Powered Software Analysis, Dependency Mapping, Architecture Visualization, Business Logic Discovery, Technical Debt Auditing, Legacy System Knowledge Extraction
Reliqsy combines AI with the practical expertise of modernization and migration specialists — using an AI-powered approach to analyze legacy code, map dependencies, and extract business logic through reverse engineering. Their framework specifically addresses poorly documented systems where conventional reverse engineering approaches struggle: code with no comments, architecture with no diagrams, logic with no specification.
RAG combined with coordinated AI agents turns fragmented system knowledge into visual architecture maps and technical documentation. Code relationships, architectural patterns, technical debt distribution, hidden dependencies — all documented before any modernization decision gets made. Teams gain clearer documentation and system visibility before making high-impact changes to critical software. The reverse engineering findings serve preparation for safer modernization rather than analysis for its own sake.
Key differentiator: AI-powered reverse engineering of poorly documented software — structured documentation from systems where no documentation exists
3. ScienceSoft
- Website: scnsoft.com
- Location: United States, UAE, Latvia, Lithuania, Poland
- Founded: 1989
- Team size: 250-999
- Hourly rate: $50-$99/hr
- Services: Stakeholder interviews, System usage observation, Code design visualization, System behavior modeling, Simulation and prototyping
ScienceSoft has been doing software reverse engineering since 1989 — before most current engineers started their careers. Their approach combines code analysis with stakeholder interviews and direct system usage observation, capturing operational knowledge alongside technical findings. Thirty-plus industries, clients across 80+ countries. Their longevity means they’ve reverse engineered systems built in environments and on stacks that no longer exist, which is exactly the situation many organizations with genuinely legacy software are dealing with.
Key differentiator: Reverse engineering that captures operational knowledge alongside technical findings — including systems built on stacks that no longer exist
4. Apriorit
- Website: apriorit.com
- Location: Poland, Ukraine
- Founded: 2002
- Team size: 250-999
- Hourly rate: $100-$149/hr
- Services: Software reverse engineering, Hardware reverse engineering, Cybersecurity risk assessment, Troubleshooting and maintenance
Apriorit’s twenty years of software reverse engineering practice leads with security — their approach surfaces vulnerabilities embedded in software alongside architectural and logical findings. Black-box systems, undocumented APIs, intellectual property concerns. Their explicit legal and ethical framework around reverse engineering matters for organizations where the engagement has IP, contractual, or compliance dimensions alongside the technical ones.
Key differentiator: Security-first software reverse engineering with explicit legal and ethical framework — relevant when IP or compliance is part of the engagement
5. RapidX (Hexaware)
- Website: hexaware.com/platforms/rapidx
- Location: 17 countries
- Founded: 1990
- Team size: 10,000+
- Services: AI-Powered Reverse Engineering, Business and Architecture Blueprinting, Forward Engineering
RapidX uses AI agents to extract business rules, dependencies, and workflows from existing software systems — producing business-friendly blueprints alongside technical documentation. Their Forward Engineering capability connects reverse engineering findings directly to system redesign: the blueprint from analysis feeds into the architecture of the new system rather than sitting as a standalone document. Enterprise delivery scale through Hexaware handles software portfolios that would overwhelm specialist reverse engineering providers.
Key differentiator: Reverse engineering connected to forward engineering — analysis findings that feed directly into system redesign
6. Modlogix
- Website: modlogix.com
- Location: New York
- Founded: 2014
- Team size: 50-249
- Hourly rate: $25-$49/hr
- Services: Code Refactoring, Re-documentation, Database Re-engineering, Functional and Technical Upgrades, UI/UX Modernization
Modlogix treats software reverse engineering as the first phase of a complete modernization path rather than a standalone service. System assessment leads to re-documentation, then to code and database re-engineering, then to modernized delivery. The team that conducts the reverse engineering implements the changes based on what they found — no handoff between analysis and implementation. For software where knowledge transfer between teams is itself a risk, their continuity model changes what the end result looks like.
Key differentiator: Reverse engineering through modernization delivery under one team — no knowledge handoff between analysis and implementation
7. Leobit
- Website: leobit.com
- Location: United States, Estonia, Poland, UK, Ukraine
- Founded: 2014
- Team size: 50-249
- Hourly rate: $25-$49/hr
- Services: Code analysis, Documentation, Porting and migration
Leobit’s software reverse engineering practice has delivered 70+ re-engineering projects across domains including high-volume applications. Their full-cycle model — reverse engineering through implementation, testing, and post-launch maintenance — keeps system knowledge with the team doing the work. The engineers who understand what the system does from the reverse engineering phase are the same ones making changes to it and supporting it afterward.
Key differentiator: Full-cycle software reverse engineering through post-launch support — system knowledge stays with the team throughout
8. Qlerify
- Website: qlerify.com
- Location: Stockholm
- Founded: 2020
- Team size: 2-10
- Services: GitHub repo reverse engineering, Business process visualization, Domain event mapping, User journey mapping
Qlerify’s AI platform reverse engineers software repositories using domain-driven design visualization — turning code into visual maps of business processes, domain events, and user journeys. The output format is designed for non-technical stakeholders alongside engineers: when business decision-makers understand what the system actually does, the conversation about what to change first is more grounded. Significantly faster than manual business process documentation approaches.
Key differentiator: DDD-based reverse engineering visualization for non-technical stakeholders — business process maps alongside technical documentation
9. SAPS Services
- Website: sapsservices.ch
- Location: Sweden
- Founded: 2007
- Team size: 11-50
- Services: Discovery, Analysis, Solution Design, Testing, and Validation
SAPS combines proven methodology with a full-cycle reverse engineering process — discovery through validation — for companies across Europe, the USA, and Canada ranging from startups to enterprises. Their approach is structured around clear deliverables at each phase rather than a single large output at the end, which gives clients visibility into what the reverse engineering is producing before it’s complete. Trusted partner for 30+ companies across their operating regions.
Key differentiator: Phased reverse engineering with deliverables at each stage — visibility into findings before the engagement concludes
10. Pelock
- Website: pelock.com
- Location: Poland
- Founded: 2015
- Team size: 50-249
- Services: Binary reverse engineering, Source code recovery, Malware analysis, Encrypted protocol investigation, Algorithm reconstruction
Pelock covers the binary end of software reverse engineering — compiled applications where source code is unavailable, source code recovery from binary files, investigation of encrypted protocols and data structures, algorithm reconstruction from binary behavior. For software situations where the source code has been lost, was never provided, or exists only as compiled binaries, their specialization handles cases that most reverse engineering providers decline.
Key differentiator: Binary-level software reverse engineering including source code recovery — handles cases where source is genuinely unavailable
How to Choose Software Reverse Engineering Services & Providers
Start with what the findings need to produce
Reverse engineering for modernization planning produces different outputs than reverse engineering for security assessment. Architecture reconstruction for migration needs different deliverables than business logic extraction for documentation. Before evaluating providers, define specifically what the reverse engineering outputs need to enable. That definition determines which providers are relevant and which capabilities matter most in the evaluation.
Evaluate how providers handle undocumented systems
The software most in need of reverse engineering is usually the least documented. Ask specifically how providers approach systems with no architecture documentation, missing source code comments, and logic that exists only in behavior. What methods do they use to reconstruct architecture from code? How do they validate that extracted business logic accurately reflects actual system behavior? The answers reveal whether you’re looking at providers with genuine experience in undocumented systems or ones whose processes depend on documentation that won’t exist.
Check domain experience for software with embedded compliance logic
Software in regulated industries has compliance requirements coded into it — rules that exist because a regulator required them, often without any documentation about which regulation or why. Providers with domain experience in your sector recognize these patterns and know what to look for in the reverse engineering. Those without encounter them on your timeline at your expense.
Assess the connection between reverse engineering and what follows
Reverse engineering that ends with a report is expensive due diligence. Providers that connect findings directly to modernization planning, migration architecture, or security remediation produce lasting value from the engagement. Ask how providers structure the relationship between what the reverse engineering finds and what happens next — whether they support both phases or treat analysis as a complete standalone service.
Look for explicit legal and ethical frameworks
Software reverse engineering has legal dimensions that vary by jurisdiction, contract, and purpose. Providers with explicit policies on what they will and won’t analyze, how they handle IP concerns, and what compliance documentation they produce reduce the risk that the engagement creates legal exposure alongside technical insight. For software with uncertain IP ownership or contractual restrictions, that framework matters before the work begins.
For a broader comparison of software reverse engineering services and providers, Recode lets you search and compare companies across software modernization, application migration, and legacy transformation.
