EvidenceLocker

The Problem

$50 billion is stolen from American workers, tenants, and consumers every year. 40 million people are in active legal disputes right now. Most will lose.

Not because they lack evidence. Because they have no idea how to turn that evidence into something a court takes seriously.

Existing tools give people information. What people actually need is structure. That gap is the entire business.

What I Built

EvidenceLocker is a production-ready AI litigation system. Describe your dispute in plain language, upload your files, and receive a complete court-ready case packet in under 5 minutes. Free. No account. No legal knowledge required.

Base Legal Analysis

Five parallel Gemini calls fire simultaneously and stream live into five documents:

Violations Report — every applicable statute by exact code, penalty, and remedy
Evidence Checklist — 10 items, 3 flagged [CRITICAL], with exact preservation steps
Demand Letter — fully cited, 14-day legal deadline, ready to send today
Filing Roadmap — jurisdiction-specific, exact forms, fees, and word-for-word scripts
Case Strategy — success probability as a percentage, settlement range, leverage, and how to counter their defenses

Exhibit Intelligence

This is where the product becomes something no one else has built.

Every uploaded file gets SHA-256 fingerprinted via the Web Crypto API before storage. Raw blobs live entirely in IndexedDB in the user's browser. Each file is sent to Gemini Vision with the full case as context and returns a formal exhibit packet:

Exhibit Index — AI-labeled Exhibit A, B, C with summaries and authenticity notes
Claim Support Matrix — every legal claim cross-referenced to supporting exhibits
Proof Gaps — exactly what evidence is still missing and how to obtain it
Cited Letter Addendum — attorney-grade paragraphs citing exhibits by formal name

Writing "Pursuant to Exhibit A, respondent demonstrably received written notice on March 3rd" hits differently than "I have evidence." That upgrade is the product.

Final output is a 10-page PDF generated entirely in the browser with jsPDF.

Architecture

Four static HTML files on Vercel. Zero backend. Zero database. Zero framework. Up to 15 structured Gemini calls per session. Evidence files never leave the user's device. API keys injected at build time via a config script, nothing sensitive in source control.

Gross margin ceiling: ~95%. Infrastructure cost at any traffic scale: effectively zero.

Business Model

Free tier — drives acquisition at zero cost
Pro at $9/month — unlimited cases
Per-case at $19 — with attorney review
White-label licensing — for legal aid clinics and worker advocacy organizations

TAM is 40 million Americans in active disputes annually.

Solo builder. 15 days. Built alongside two other active projects.