LeaseComp — Paste Two Commercial Lease Offers, Get a Plain-English Side-by-Side in 60 Seconds
Small business owners negotiating a second location or office renewal are handed two 60-page lease PDFs by their broker and expected to make a six-figure decision without a lawyer on speed dial. LeaseComp extracts, normalizes, and compares the key economic terms across two leases in plain English so you know which one is actually cheaper before you sign.
Difficulty
beginner
Category
Legal Tech
Market Demand
High
Revenue Score
6/10
Platform
Web App
Vibe Code Friendly
No
Hackathon Score
🏆 8/10
What is it?
Commercial lease comparison is a $200-500/hour legal task that small business owners either skip entirely or spend $2,000 on an attorney for a decision they needed to make last Tuesday. The core pain is normalization: base rent, CAM charges, escalation clauses, TI allowances, and free rent periods are written differently in every lease, making apples-to-apples comparison impossible without expertise. LeaseComp takes two PDF uploads, extracts the 15 most financially significant clauses using Claude, normalizes them into a comparable table, and flags which lease wins on each dimension and by how much. The output is a one-page PDF comparison report the owner can take to their broker or bank. Buildable in 10 days using Next.js, Supabase Storage for PDF uploads, and the Claude API with a structured JSON extraction prompt. The commercial real estate market has 6 million+ small business tenants in the US alone.
Why now?
Claude's 200k context window released in late 2025 finally makes full 60-page PDF ingestion reliable enough to extract structured lease data in a single API call, removing the chunking complexity that made this unviable in 2024.
- ▸Dual PDF upload with Claude extraction of 15 standard commercial lease terms into structured JSON (Implementation note: Claude vision on PDF pages, structured output with Zod validation)
- ▸Side-by-side normalized comparison table showing base rent, CAM, escalation, TI allowance, free rent, lease term, renewal options, and termination clauses
- ▸Winner-per-row highlighting with a total 5-year cost estimate for each lease
- ▸One-click downloadable PDF comparison report branded with the user's business name
Target Audience
Small business owners signing or renewing commercial leases — restaurants, retailers, and professional service firms with 1-5 locations, roughly 4 million businesses in the US.
Example Use Case
Restaurant owner Priya is choosing between two retail spaces. She uploads both leases, pays $29, and gets a table showing that Lease B is $18,000 cheaper over 5 years despite a higher base rent, because of a larger TI allowance and 4 months free rent she almost missed.
User Stories
- ▸As a small business owner, I want to upload two lease PDFs and see a plain-English cost comparison, so that I can make a six-figure decision without paying an attorney $300/hour.
- ▸As a commercial real estate broker, I want to generate instant lease comparison reports for my clients, so that I can close deals faster and add value beyond showing properties.
- ▸As a first-time retail tenant, I want to see which lease has the better TI allowance and free rent period, so that I understand the real cost before I sign.
Done When
- ✓PDF extraction: done when both uploaded PDFs return a structured comparison table with at least 12 of the 15 target clauses populated within 60 seconds.
- ✓Payment gate: done when the full comparison table and download button are hidden until Stripe checkout completes successfully.
- ✓Report download: done when user clicks Download and receives a formatted PDF with their business name, both lease addresses, and the full comparison table within 10 seconds.
- ✓Disclaimer: done when a legal disclaimer stating this is not legal advice is visible on both the comparison page and the downloaded PDF report.
Is it worth building?
$29 per report × 200 reports/month = $5,800 MRR at month 4. Assumes 2,000 monthly visitors at 10% conversion from SEO content targeting commercial lease comparison queries.
Unit Economics
CAC: $12 via SEO and Reddit organic. LTV: $29 per transaction (one-time) or $948 (12 months at $79/month for broker plan). Payback: immediate. Gross margin: 78%.
Business Model
Pay-per-report
Monetization Path
$29 per comparison report. No subscription needed — pay once per comparison. Optional $79/month unlimited plan for real estate brokers.
Revenue Timeline
First dollar: week 1 via first report purchase. $1k MRR: month 2. $5k MRR: month 5.
Estimated Monthly Cost
Claude API: $60, Supabase: $25, Vercel: $20, Stripe fees: $25. Total: ~$130/month at launch.
Profit Potential
Lifestyle business at $5k MRR. Can grow to $15k MRR with broker subscriptions.
Scalability
Can expand to a broker subscription tier, lease clause library, and a negotiation letter generator that tells tenants exactly what to push back on.
Success Metrics
Week 2: 50 report purchases. Month 2: 200 reports/month. Month 4: 5 broker subscribers.
Launch & Validation Plan
Post a free version (watermarked report) on r/smallbusiness and r/legaladvice. Count how many people upload two PDFs without being asked. Charge for the clean version.
Customer Acquisition Strategy
First customer: post in r/smallbusiness offering a free lease comparison in exchange for a screenshot testimonial. Then DM 20 commercial real estate brokers on LinkedIn offering a white-label version at $79/month. Ongoing: SEO targeting commercial lease comparison, TI allowance calculator queries.
What's the competition?
Competition Level
Low
Similar Products
LeaseCrunch is enterprise CRE software at $500+/month. Clause.io does contract review but not comparative normalization. ChatGPT can extract clauses but gives no structured side-by-side output or downloadable report.
Competitive Advantage
$29 one-time beats $300 attorney consult for a decision that needs to happen this week, and it is faster than any human alternative — no competitor offers normalized multi-lease PDF comparison at this price point.
Regulatory Risks
Must include a clear disclaimer that this is not legal advice and users should consult a licensed attorney before signing. Not practicing law — providing a data normalization tool. Low regulatory risk if disclaimer is prominent.
What's the roadmap?
Feature Roadmap
V1 (launch): dual PDF upload, Claude extraction, comparison table, Stripe one-time payment, PDF download. V2 (month 2-3): negotiation letter generator, broker subscription tier. V3 (month 4+): lease clause library, attorney referral upsell.
Milestone Plan
Phase 1 (Week 1-2): PDF upload, Claude extraction, comparison table ship, done when 5 real leases extract accurately. Phase 2 (Week 3-4): Stripe payment gate and PDF report generation live, done when first paying report downloads. Phase 3 (Month 2): 100 report purchases, done when weekly report volume grows without founder outreach.
How do you build it?
Tech Stack
Next.js, Claude API, Supabase Storage, Stripe, Resend, react-pdf — build with Lovable for UI, Cursor for PDF extraction logic, v0 for comparison table components
Suggested Frameworks
-
Time to Ship
10 days
Required Skills
Claude PDF extraction, Next.js file upload, Stripe one-time payment, react-pdf report generation.
Resources
Claude API docs for document processing, Supabase Storage docs, Stripe one-time payment guide, react-pdf docs.
MVP Scope
app/page.tsx (landing with dual PDF upload UI), app/compare/page.tsx (comparison table result), app/api/extract/route.ts (Claude PDF extraction to JSON), app/api/compare/route.ts (normalization and winner logic), app/api/report/route.ts (react-pdf generation), lib/db/schema.ts (comparisons, reports tables), lib/claude.ts (extraction prompt + Zod schema), lib/pdf.ts (react-pdf template), .env.example (Claude, Supabase, Stripe keys)
Core User Journey
Upload 2 PDFs -> pay $29 -> see comparison table -> download PDF report -> make decision.
Architecture Pattern
User uploads 2 PDFs -> Supabase Storage -> /api/extract sends both to Claude -> structured JSON returned -> /api/compare normalizes and scores -> /api/report generates react-pdf -> download link returned to user -> Stripe one-time payment gates the full report.
Data Model
Comparison has two LeaseUploads (Supabase Storage URLs). Comparison has one ExtractedData JSON blob per lease. Comparison has one Report (PDF URL) and a payment_status field.
Integration Points
Claude API for PDF extraction and clause classification, Supabase Storage for PDF uploads, Stripe for one-time payment, react-pdf for report generation, Resend for report delivery email, Vercel for hosting.
V1 Scope Boundaries
V1 excludes: lease negotiation letter generator, broker white-label portal, multi-lease comparison (more than 2), mobile app, attorney referral network.
Success Definition
A small business owner finds LeaseComp via Google, uploads two real lease PDFs, pays $29 without any founder interaction, and downloads a report that changes which lease they choose.
Challenges
Claude extraction accuracy on poorly-scanned or unconventionally formatted leases will be imperfect — the hardest non-technical challenge is distribution: small business owners do not search for lease comparison tools until 48 hours before they need to sign, so SEO must be paired with broker partnerships.
Avoid These Pitfalls
Do not try to cover every possible lease clause type in v1 — pick the 15 most financially significant and nail those. Do not generate the report before payment is confirmed or users will screenshot it for free. Expect that 60% of uploaded PDFs will be scanned images requiring Claude vision, not clean text — test this on real lease PDFs before launch.
Security Requirements
Supabase Auth optional for v1 (guest checkout flow), Supabase Storage bucket is private with signed URLs, PDFs deleted from storage after 30 days, Stripe webhook signature verified on every event, legal disclaimer on all output.
Infrastructure Plan
Vercel for Next.js, Supabase for Postgres and Storage, GitHub Actions for CI, Sentry for errors — total $130/month at launch with PDFs auto-deleted after 30 days to control storage costs.
Performance Targets
50 DAU and 200 req/day at launch, Claude extraction under 45 seconds per dual-lease comparison, page load under 2s, no caching needed at this scale.
Go-Live Checklist
- ☐Security audit complete.
- ☐Payment flow tested end-to-end.
- ☐Error tracking (Sentry) live.
- ☐Monitoring dashboard configured.
- ☐Custom domain set up with SSL.
- ☐Privacy policy, terms, and legal disclaimer published.
- ☐5 beta reports generated on real leases.
- ☐Rollback plan documented.
- ☐Launch post drafted for r/smallbusiness and r/legaladvice.
First Run Experience
On first run: a demo comparison using two pre-loaded sample commercial lease PDFs is visible on the landing page showing the full table output. User can scroll through the demo comparison result immediately. No manual config required: demo uses static JSON seed data so the comparison renders instantly without any API call or payment.
How to build it, step by step
1. Define Drizzle schema for comparisons, lease_uploads, and reports in lib/db/schema.ts with payment_status field. 2. Scaffold Next.js app and install @anthropic-ai/sdk, @react-pdf/renderer, drizzle-orm, stripe, resend. 3. Build dual PDF upload UI on app/page.tsx with Supabase Storage upload and preview using Lovable. 4. Build Claude extraction prompt in lib/claude.ts using structured output with a Zod schema covering 15 standard lease terms. 5. Build /api/extract route that sends both PDFs to Claude and stores extracted JSON in Supabase. 6. Build /api/compare normalization logic that calculates 5-year cost for each lease and marks the winner per row. 7. Build react-pdf template in lib/pdf.ts rendering the comparison table as a downloadable report. 8. Gate the download behind Stripe one-time payment checkout — only generate and return PDF URL after payment webhook confirms. 9. Send report PDF URL via Resend email as backup to the download link. 10. Verify: upload two real commercial lease PDFs, complete Stripe checkout, confirm comparison table loads correctly, download PDF report, check all 15 clauses are extracted accurately.
Generated
June 19, 2026
Model
claude-sonnet-4-6
Disclaimer: Ideas on this site are AI-generated and may contain inaccuracies. Revenue estimates, market demand figures, and financial projections are illustrative assumptions only — not financial advice. Do your own research before making any business or investment decisions. Technology availability, pricing, and market conditions change rapidly; always verify details independently.