Secure upload. SOC 2 compliant. Built for legacy and modern systems.Turn existing code into a clear software definition
Userdoc analyzes your source code and creates clear, human-readable documentation of your system's features, how they work, how they relate, and where they live in the code, so you can understand, maintain, and rebuild your software faster.
auth.js
Frontend
users_api.py
API
usr_pwd.rb
Backend
users.sql
Database
As an Account Manager,
I want password rules clearly defined,
So users and administrators understand how account security works.
1. Enforces policy requirements
1. Minimum length of 8 characters
2. At least one uppercase letter
3. At least one lowercase letter
4. At least one numeric digit
5. At least one special character (e.g., !@#$%^&*?)
2. Rejects passwords found in the previous 5 password hashes.
3. ...
The problem
Most software teams are flying blind
As systems grow, the truth about how they work gets scattered across out-of-date documentation, Jira tickets, and complex code.
... and in most organizations, software engineers are the only people who can read that source code.
- Software is a critical asset but not everyone can read code
- No one person understands the full system anymore
- Documentation is missing, outdated, or too technical
- Business teams depend on developers for every answer
- Rebuilds and migrations are hard to scope accurately
- AI coding tools lack the context they need
- Modernization planning is daunting without a clear current state
The shift
You already have a source of truth
It is your source code. It just needs to be unlocked and made readable by everyone. Userdoc turns it into structured software knowledge your whole team can read and use for planning and future development.
How it works
From complex code to clear documentation
A guided process that starts by understanding your system, then shapes the analysis around the reality of your codebase.
We understand your system
We start with a conversation about your codebase, architecture, business goals, and the parts of the system that need to be understood.
We customize the agents
Every codebase has quirks. We tune the analysis approach so Userdoc can interpret your system, patterns, and domain language accurately.
You review discovered features
Userdoc surfaces the features it finds, giving your team a chance to confirm, refine, and guide what should become documentation.
Userdoc generates specs
Userdoc creates clear feature documentation, acceptance criteria, code-file relationships, and structured system knowledge.
Faster than manual documentation
Detailed documentation in hours, not months.
Up to 1000x
faster than manually documenting source code with developers or business analysts.
Up to 100x
cheaper than manual analysis, depending on codebase size and complexity.
Case studies
Real systems. Real results.
Userdoc has helped teams understand legacy platforms, plan rebuilds, onboard people faster, and prepare their systems for AI-assisted development.
Baseplan
12M+ lines of legacy code
A 20-year-old equipment rental platform needed current-state documentation before a major rebuild. Userdoc helped the team understand the existing system, at dramatically lower cost.
“The team has found Userdoc extremely valuable, using the documentation for both reviews and new work.”
Tempesta Media
400+ features surfaced
A 15-year-old custom platform had limited internal documentation. Userdoc created a source of truth for onboarding, support, maintenance, and future AI-assisted work.
“Quite simply amazing. We expected good results, but not this level of quality.”
CSIRO / AQVx
Legacy API documented in minutes
A mission-critical modelling system in an obscure language needed to be migrated. Userdoc created accurate, readable documentation that became the starting point for redevelopment.
“Userdoc was incredible, and integral to the redevelopment of this application.”
Security
Your source code stays private
Userdoc is designed for sensitive software projects. Your code is handled securely, encrypted in transit and at rest, and never used to train AI models.
Interested in unlocking the truth behind your source code?
Tell us about your codebase and we will help estimate the effort, cost, and documentation output.