Codebase Audit & Technical Due Diligence for AI-Built Code
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Codebase audit & technical due diligence for AI-built software

Know what you built
before you raise or sell.

A
What's yours?

You built fast. Do you know what you built?Paste your GitHub URL. Free scan, under 3 minutes. Every finding tied to a file and line you can open yourself.

No signup requiredResults in ~3 minHow we handle your data

9 ecosystemsframework-aware analysis
Open sourcescanner you can read

What Comes Back

Every finding carries its severity, the exact file and line, and what it means in one sentence. Critical and high findings show their location free, without signing up.

Illustrative example. The format every report uses, with a composed project.

  • Criticalsrc/lib/db.ts:14
    const DATABASE_URL = "postgres://admin:••••••••@db..."

    Your database password is written into the code.

  • Critical.env.production:3
    STRIPE_SECRET_KEY=sk_live_••••••••

    A live payment key is committed to the repository.

  • Highsrc/app/api/upload/route.ts:22
    const data = req.body; // no validation

    Uploads are accepted without checking what they contain.

Secret values are masked before they reach your screen. Your own report states its coverage the same way every report does: files read out of files present.

Technical Findings. Business Language.

Every issue comes with a plain-English explanation: what it means, what it costs, and what to do about it.

What a developer sees
localStorage.setItem(STORAGE_KEYS.messages, JSON.stringify(allMessages))

“It's just caching, it's fine.”

What you see in SystemAudit

Customer data stored unprotected on devices

Chat conversations are saved in the browser without encryption. If a device is compromised, business discussions could be exposed.

Cost to fix$200 to $500A few hours
If not fixedSecurity review riskEnterprise deals at stake

See It In Action

Every panel below is the real report UI: a system map, risk scan, and fix plan that anyone on your team can understand.

systemaudit.dev/report/acme-corp/saas-platform

Report ready

Analysed 80 of 214 files · 12 components · 47s

An example report, in the format every scan produces. The panels are the real product; the repository is composed.

What founders are saying

Real feedback from early users. Names and companies changed at their request.

“Investor asked for a tech due diligence report. Didn't have one. Ran this 20 minutes before the call. At least I had something to show.”

J

James L.

Founder · Pre-seed fintech

“Took over a codebase from a dev agency. No docs, no tests, no nothing. This thing at least told me what I was dealing with. Worth it just for that.”

D

Dan R.

New CTO

Your Code Stays Yours

Enterprise-grade security. Zero compromises.

We Only Read

Public repos are read with a token that cannot change anything. Private repos are read through our GitHub App, which has read-only access to only the repositories you choose.

Zero Storage

Your code is analyzed in real-time and never saved. Nothing persists after the scan.

No AI Training

Your code is never used to train AI models. Analysis is private to you.

Secure Payment

Stripe-powered checkout. 14-day money-back guarantee — full refund if you're not satisfied, no reason needed.

Scores You Can Trust

Dangerous systems can't look healthy. If your code has exposed secrets or critical failures, the score drops — no exceptions. The number always matches what we actually found.

What You Get

Paste a GitHub URL. The first two arrive in under 3 minutes without paying.

Free, from the first scan

Security Scan

Free

Exposed secrets, .env files, hardcoded credentials and vulnerabilities, each with the exact file and line, and a plain-English explanation of what it means.

“Find what's exposed before attackers do”

Architecture Map

Free · your email

Visual system diagram showing how all parts connect. Understand your codebase without reading a single line.

“See your system at a glance”

Added when you upgrade

AI Readiness Grade

Pro

Letter grade (A-F) across five dimensions: code clarity, test coverage, modularity, documentation, type safety. Each with evidence from your code and what it would take to move it — a 42 today and an 85 possible.

“Know if AI tools can safely modify your code”

Business Translation

Pro

Cost-to-fix and cost-if-ignored for every issue. ROI projections. Investor-ready PDF export.

“Turn technical debt into budget decisions”

Developer Brief

Pro

A copy-pasteable summary with your top five fixes, stack context and effort estimates. Send it to any developer and they can start without a handover meeting.

“Delegate without translating”

What's Hiding In Your Code?

35%

of private repositories contain at least one plaintext secret

GitGuardian, State of Secrets Sprawl 2025

87%

of audited codebases contain at least one known vulnerability

Black Duck, 2026 OSSRA report

40%

of the programs GitHub Copilot generated in security-relevant scenarios were vulnerable

Pearce et al., NYU — “Asleep at the Keyboard?” (2021)

The only thing worse than having these problems is not knowing about them.

Do You Need a Consultant, or a First Pass?

Traditional audits often run weeks and five figures. That is the right call for some systems and a waste for most. Find out which one you have before you book one.

Cost
Consultant
Often five figures
SystemAudit
From $0 (free scan available)
Time to results
Consultant
1 to 3 weeks
SystemAudit
Under 3 minutes
Getting started
Consultant
NDAs, scoping calls, onboarding
SystemAudit
Paste a link and go
Objectivity
Consultant
May recommend their own services
SystemAudit
Deterministic scan — open the file and line yourself
Evidence
Consultant
General findings in a PDF
SystemAudit
Exact file and line for every issue
Code exposure
Consultant
Shared with auditors
SystemAudit
Source code not stored
Repeatable
Consultant
Pay again each time
SystemAudit
Re-scans of a paid repo included
Also included with every scan
Exact Issue LocationsPlain-English ExplanationsScan Coverage StatedArchitecture MapStack DetectionFeature Verification
Answers in minutes, not the weeks a consultant engagement takes

Need a person to check it and sign their name to it for an investor or acquirer? Request a technical due diligence review, from $1,500.

Simple, transparent pricing

Choose Your Plan.
Know What You Built.

Each step answers a bigger question. Start free, and pay only for the answer you need.

No Card RequiredSource Code Not StoredResults in 3 min
No Card Required

Free Scan

Is there a problem?

$0forever

Public repositories only

Security & Secrets Scan

Detect exposed API keys, .env files, credentials

Architecture Map

Visual diagram of your system components — free with your email

Handoff & Supply Chain Grades

Letter grades for how ready your code is to hand over, and how exposed your dependencies are

Critical Issues With Exact Locations

File, line and redacted snippet — no signup needed

Dependency Analysis

Check for vulnerable packages

Quick Audit

What are the biggest problems?

$19one report

Projects up to 150K lines

Everything in Free

All scanning and detection features

Your Top 5 Risks, Ranked

From the AI analysis, each checked against your source

Fix Now, and Before You Raise or Sell

The two most urgent groups of the fix-first plan, in full

Who Holds the Knowledge

Area-by-area view of whether one person holds each part of the code

UNLOCK EVERYTHING

Full Audit

What exactly should I fix?

$49– $199

Price based on your project size

Everything in Quick Audit

Plus every finding, not just the top five

Private Repository Support

Analyze private GitHub repos securely

All Risks Unlocked

Every issue with cost-to-fix estimates

PDF Export

Shareable report for investors or devs

Developer Brief

Copy-paste summary to hand off to any dev

The Whole Fix-First Plan

Before enterprise sales, before hiring, and what can wait

Fix Prompts for Cursor or Lovable

Copy a ready-made prompt for each finding and paste it into your AI editor

Re-scans Show What You Fixed

Re-scan a repo you've paid for and see what was resolved and what is new

Your price = your project size

We measure lines of code after you scan. No surprises.

$49
Smallup to 30K linesMost vibe projects
$99
Mediumup to 75K lines
$199
Largeup to 150K lines

Built with Cursor, v0, or Bolt? Most AI-generated projects are under 30K lines — you'll likely pay $49.

Technical due diligence

I need professional-level certainty

For a raise, a sale or an acquisition: the Full Audit reviewed and signed by Nic Chin, who built SystemAudit.dev, with a walkthrough call. From $1,500, scope confirmed before anything is charged.

Request a review

Monitoring · coming soon

Keep watching it

A re-scan every day, and an email the moment a new critical problem appears, like a live key pushed by a contractor. Join the waitlist to hear when it opens.

Over 150K lines of code? Contact us for custom pricing.

Auditing several repositories? A multi-repo subscription is $29 a month and covers every repo you scan, at the same per-repo depth as the size tiers.

See full pricing details and what each tier includes →

You built fast. Now know what you built.

Your next audit is one click away.

Get My System Grade

Frequently Asked Questions

You'll get a complete picture of your software system: how it's structured, what's working well, what's risky, and what needs fixing. Every issue comes with cost-to-fix and cost-if-ignored estimates. Think of it like a health checkup for your product. You'll walk away knowing exactly where you stand, what it costs, and what to do next.

Yes. The report is designed for decision-makers, not developers. You'll see a visual map of your system, risks ranked from urgent to minor, and a plain-English action plan. No jargon, just clarity on what matters.

Your code is completely safe. SystemAudit.dev reads your code through GitHub's official API, analyzes it in real-time, and never stores it. Nothing is saved, shared, or used to train AI. Only you see the results.

Under 3 minutes for most projects. You paste a link, the AI reads your entire system, and you get a full report. No scheduling consultants, no waiting weeks for results.

Yes. The free scan works with public repositories. Any paid tier — Small at $49, Medium at $99, or Large at $199 — supports private repositories. You connect your GitHub account securely and we analyze your system without ever storing your code.

We provide deep, framework-aware analysis for 9+ ecosystems: JavaScript/TypeScript (Next.js, Express, React), Python (Django, FastAPI, Flask), Java (Spring Boot, Maven, Gradle), Go (Gin, Echo, Chi), Rust (Actix, Axum, Cargo), C#/.NET (ASP.NET Core, NuGet), PHP (Laravel, Composer), and Ruby (Rails, Bundler). We parse dependencies, detect architecture patterns, and extract features for each framework. Beyond these, our AI analysis reads any language. The LLM understands code regardless of syntax.

Your system gets a letter grade from A to F, based on 5 dimensions: code clarity, test coverage, modularity, documentation, and type safety. Each dimension comes with specific evidence from your codebase, a plain-English explanation of what it means for your team, and a concrete action to improve it, including effort estimates. You also get an improvement trajectory showing how your score changes as you fix issues week by week, so you can track real progress.

No. The score is based on security and infrastructure checks weighted by severity. Critical findings immediately limit the maximum score, so a dangerous system cannot appear healthy. Every score is tied to the actual issues found — you can look at the risk list and see exactly why the number is what it is.

Every finding is checked against your actual source code. SystemAudit reads your real files, and any issue the AI cannot tie to a specific file and line is automatically downgraded or dropped before you see it — so you get problems we can point to, not invented ones. The scanner engine is open source, so you can read exactly how it works.

Traditional code audits often run weeks and five figures. SystemAudit.dev is not a replacement for one: it does not do penetration testing, and it cannot judge whether your architecture suits where the product is going. What it does in under 3 minutes is tell you what you have, what is exposed and what to fix first, which is usually enough to decide whether a consultant engagement is worth booking. If you need a person to review the findings and sign the report for an investor or acquirer, the technical due diligence review starts at $1,500.

Yes. Paid plans include a Developer Brief: a plain-text summary with your top 5 priority fixes, tech stack context, and effort estimates. Copy it, paste it into Slack or email, and your developer or freelancer can start immediately. No context-setting meeting needed.

Every paid tier includes the same report: private repo support, all risks with cost-to-fix estimates, feature verification, the AI Readiness Decision Brief, business translation, a prioritized fix plan, the Developer Brief, PDF export, and re-scans of a repo you've paid for. Price is set by project size, because size sets how much there is to read — $49 covers up to 30K lines, $99 up to 75K, and $199 up to 150K. Size also sets how many files are read: the free scan reads 40, 80 or 150, and the paid analysis reads 80, 160 or 240, with multi-pass AI analysis over them checked against your source, plus everything listed above. We measure your lines of code during the free scan and show you your price before you pay. Above 150K lines, contact us for a custom enterprise plan.

Your system has a grade.
You just don't know it yet.

Paste your GitHub URL. Find out in under 3 minutes. Free for public repos. Quick Audit $19, Full Audit $49 to $199.

Join founders who already know their grade