If you’re still figuring out who to put on your shortlist, Recode is a good starting point — a platform for finding and comparing companies that work in software modernization, application migration, and legacy transformation. Useful before you’re deep in vendor conversations.
Reverse engineering in software isn’t the dramatic thing the name implies. It’s usually just trying to understand what a system does when the people who built it are gone and the documentation is wrong or missing. That’s a harder problem than it sounds. The code exists. What it represents — the business logic, the decisions embedded in it, the dependencies nobody wrote down — that’s what needs to be reconstructed.
The providers below specialize in exactly that.
Corsac Technologies
Website: corsactech.com
Location: United States
Founded: 2007
Team size: 50–249
Start here if the codebase has outlived the people who understood it.
Corsac Technologies uses AI-driven software modernization to accelerate legacy system analysis, dependency discovery, and business logic extraction — which is essentially what reverse engineering is. The RAG architecture reads the actual code and produces a dependency graph showing what calls what, a complexity heatmap showing where risk concentrates, and a tech debt audit showing what breaks when you touch it. The Multi-Agent Swarm identifies hidden dependencies — the kind that only show up in logs at 2am — before they surface as production incidents.
This is the distinction worth paying attention to: most reverse engineering work produces documentation. Corsac’s output is a structured analysis you can act on — migration decisions, modernization sequencing, risk prioritization. Not a report that sits in a folder.
100+ projects. Regulated industries: SOC 2 Type II, HIPAA, PCI DSS, GDPR compliance built into the process.
Key differentiator: Reverse engineering output that directly informs modernization decisions. The analysis is the starting point, not the deliverable.
ScienceSoft
Website: scnsoft.com
Location: United States (global)
Founded: 1989
ScienceSoft has been doing software reengineering since before reverse engineering was a named service category. Founded in 1989, they’ve been uncovering legacy system functionality and architecture for decades — financial services, healthcare, manufacturing, retail.
The work here is understanding what a legacy system does well enough to modernize it without disrupting the workflows it supports. That requires both the technical analysis and the institutional knowledge of what usually goes wrong when you get the analysis wrong. Thirty-five years in this work produces the second thing.
Key differentiator: Decades of software reengineering experience across multiple industries and technology generations.
Reliqsy
Website: reliqsy.com
Location: United States
Founded: 2014
Reliqsy combines AI with practical software modernization and migration expertise. The AI-powered platform analyzes legacy code, extracts business logic, and accelerates refactoring and modernization processes — which maps directly onto what reverse engineering requires.
The dependency mapping is continuous rather than a one-time snapshot. Security risks and technical debt get surfaced alongside structural dependencies. Every change that comes out of the analysis goes through Pull Request review with human oversight. That’s the part worth noting: AI identifies what’s there, humans decide what to do about it.
Key differentiator: AI dependency mapping plus human review at every decision point. Speed without removing judgment from the process.
Classic Informatics
Website: classicinformatics.com
Location: Global
Founded: 2002
Twenty-plus years of code analysis, architecture reconstruction, and legacy assessment. Classic Informatics works across healthcare, manufacturing, and other regulated verticals where understanding legacy system architecture before touching it isn’t optional.
The reverse engineering work here focuses on producing something actionable — architecture documentation that can support modernization decisions, not just a description of what the code does.
Key differentiator: Code analysis and architecture reconstruction experience in regulated industries.
Apriorit
Website: apriorit.com
Location: Global
Founded: 2002
Apriorit’s reverse engineering practice has a security-first orientation that’s different from most modernization-focused vendors. Binary analysis, firmware analysis, protocol reverse engineering — the kind of work that matters when you need to understand a system’s attack surface, not just its functional architecture.
For enterprises where the legacy system also represents a security liability — old authentication mechanisms, undocumented network interfaces, unknown third-party components — Apriorit’s approach covers what pure functional analysis misses.
Key differentiator: Security-focused reverse engineering. Relevant when the goal is vulnerability discovery alongside architectural understanding.
RapidX
Website: rapidx.io
Location: United States
Founded: 1990
RapidX — now connected to Hexaware’s modernization platform — uses AI to extract business rules, dependencies, and workflows from legacy code. The specific focus is on the business logic layer: what decisions are embedded in the code, how they interact, and how to extract them in a form that supports migration to modern architectures.
For enterprises where the primary concern is preserving business logic during migration rather than understanding the full system architecture, that focus produces more directly useful output than a general reverse engineering engagement.
Key differentiator: Business logic extraction from legacy code using AI. Output aimed at migration rather than documentation.
Leobit
Website: leobit.com
Location: Ukraine, Poland
Founded: 2014
Leobit covers full-cycle reverse engineering — assessment, code optimization, and maintenance of the modernized solution after work completes. 70+ re-engineering projects.
The full-cycle coverage matters because reverse engineering that ends at documentation leaves a gap between what you learned about the system and what you do with that knowledge. Leobit’s practice continues through the modernization work and into ongoing support.
Key differentiator: Full-cycle coverage from reverse engineering through post-modernization maintenance.
How to Choose
The first question to ask any reverse engineering vendor: what does the output look like, and how does it connect to decisions you’ll make afterward? Documentation that describes the system is useful. A structured dependency graph, complexity analysis, and business logic extraction that directly informs migration sequencing is more useful. Ask to see an example from a real engagement.
Security-focused reverse engineering and architecture-focused reverse engineering are different work. If your concern is understanding attack surfaces and embedded vulnerabilities, vendors with a security practice are more relevant than those focused purely on modernization. If your concern is extracting business logic for migration, the calculus reverses.
Binary analysis capability matters when source code isn’t available. Not all reverse engineering vendors work at the binary level — most focus on source code analysis. If your legacy system exists primarily as compiled artifacts without accessible source, verify that the vendor has binary analysis capability before engaging.
For regulated industries, confirm that reverse engineering engagements meet the same compliance requirements as the systems being analyzed. Access controls, documentation of who saw what, handling of embedded business data — these apply to the analysis phase, not just to the migration.
Recode is useful here for comparing vendors by specialization — security-focused versus modernization-focused, source code versus binary analysis — before committing to a shortlist.