Built for angel investors
The diligence OS for
serious angel investors.
Structured frameworks, signal tracking, and AI‑assisted document extraction — so every deal gets the rigour it deserves.
7-day free trial · $19.95/mo after · Cancel anytime
3
Diligence phases
100+
Framework questions
7-day
Free trial
1
Clean workflow
Diligence is where great investments are made — or lost.
Most angel investors are systematic thinkers. Their diligence process isn't. Zen Due changes that.
Structured Frameworks
Screening → Early DD → Late DD. Purpose-built questions for every stage so you never miss a critical line of inquiry.
Signal Tracking
Flag every RED, YELLOW, and GREEN finding as you work. Build conviction systematically — or know exactly why you're walking away.
Knowledge That Compounds
Every deal you analyse makes you a sharper investor. Search insights across your entire deal history — your edge grows with every decision.
AI Document Extraction
Upload a pitch deck, term sheet, or memo. Claude reads it and maps it to your framework in seconds — no copy-paste, no lost context.
How it works
01
Add a deal
Enter the company name and sector. The structured screening form captures the essential deal context right away.
02
Work through each phase
Answer framework questions, flag signals, and import documents as you go. Everything lives in one place.
03
Decide with confidence
Review your signal map — all your RED, YELLOW, and GREEN findings in one view — and make a decision backed by your own rigorous process.
New to angel investing?
We've got you covered.
Diligence 101 is our free library of frameworks, guides, and mental models built for first-time and early-stage angel investors. No paywall, no signup required — just the foundations you need to evaluate deals with confidence.
Subscribe to UnlockWhat to look for in a founding team
The signals that separate great founders from good ones.
Understanding term sheets
Valuations, pro-rata rights, liquidation preferences — plain English.
How to read a cap table
Ownership, dilution, and what it means for your return.
Red flags vs. yellow flags
Not every concern is a dealbreaker. Learn how to weigh them.
From the blog
Thinking on angel investing and due diligence.
Introducing Zen Due: A Diligence OS for Angel Investors
Why we built Zen Due, what it does, and who it's for.
5 Questions Every Angel Investor Should Ask Before Writing a Check
Before you commit capital, these five questions will surface the most critical risks in any early-stage deal.
Reading a Term Sheet: A Walkthrough for First-Time Angels
A video walkthrough of the key clauses in a seed-stage term sheet — what they mean, what's negotiable, and what to watch out for.
Simple, transparent pricing.
One plan. All features. No surprises.
7-day free trial included
- All diligence phases (Screening, Early DD, Late DD)
- Signal tracking (RED / YELLOW / GREEN)
- AI document extraction
- Cross-deal knowledge base
- Unlimited deals
No commitment. Cancel anytime.
Start making better investment decisions today.
Join investors who use Zen Due to bring rigour and calm to every deal.
Start your free 7‑day trial →