Free dilution simulator

Understand your SAFE
before you sign it

Enter your SAFE terms and instantly see how you get diluted — in plain English, no CFO needed.

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How it works

From confusing to crystal clear
in three steps

No spreadsheets. No lawyer required. Just plug in your numbers and see exactly what happens.

01
📋
Enter your SAFE terms

Valuation cap, discount rate, investment amount. Takes 60 seconds. We handle the math, you handle the vision.

02
📊
See your conversion

Instant visualization of how your SAFE converts at different funding scenarios. Watch ownership percentages update in real time.

03
📄
Download the full PDF

Get a detailed report with all dilution scenarios modeled — pre-money, post-money, pro-rata, MFN. Exportable and shareable.

Live preview

See your cap table
in real time

Most founders don't realize how much dilution compounds across rounds. SafeSim makes it tangible — before it's too late to negotiate.

  • →Works for YC SAFE, post-money SAFE, and custom terms
  • →Side-by-side scenario comparison
  • →Plain-English explanations of every number
  • →No login, no credit card for the free tool
safesim — dilution model
SAFE TYPEPost-Money
VALUATION CAP$10,000,000
INVESTMENT$500,000
DISCOUNT RATE20%
YOUR OWNERSHIP4.76%
DILUTION AT SERIES A–2.1%
CAP TABLE BREAKDOWN
Founders 68%SAFE 4.8%Options 12%

The full report

$9 one-time

Detailed Dilution Scenario PDF

All scenarios modeled and explained in one exportable document. Hand it to your co-founder, your angel, your future Series A lead. Know your numbers before the term sheet hits your inbox.

  • Every conversion scenario at $2M, $5M, $10M, $20M Series A
  • Side-by-side cap table comparisons (pre vs. post dilution)
  • Plain-English founder summary — no jargon
  • PDF, shareable with advisors and co-founders
  • Delivered instantly after purchase
Get the PDF→

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100%
Free to simulate. Pay only for the full PDF export.
$0
No subscription. No hidden fees. One payment, forever yours.
60s
Average time to run your first simulation.
YC
SAFE format supported, including post-money YC standard.