SAFE vs convertible note

Both let early investors put money in now and get shares later, without setting a price today. The difference is that one is debt and one isn't — which changes the terms.

The short version

A SAFE is a simple agreement for future equity — not a loan, no interest, no maturity date. A convertible note is debt: it carries interest and a maturity date, but also converts into shares at the next round. Both typically use a cap and/or discount.

Side by side

	SAFE	Convertible note
Is it debt?	No	Yes
Interest	None	Accrues interest
Maturity date	None	Yes — a repayment deadline if it doesn't convert
Converts into shares	At the next priced round	At the next priced round (or maturity)
Typical sweeteners	Cap and/or discount	Cap, discount, plus interest added to the balance

What it means for your equity

As an employee you don't hold these — but they matter because they convert into shares and dilute the cap table at the next round. A stack of SAFEs or notes with low caps can create more shares than expected, shrinking your ownership percentage. Modelling it shows your true fully-diluted stake.

Frequently asked questions

What's the main difference between a SAFE and a convertible note?

A convertible note is debt — it accrues interest and has a maturity date by which it must convert or be repaid. A SAFE is not debt: no interest, no maturity, just a right to future shares. Both convert into equity at the next priced round, usually with a cap and/or discount.

Do SAFEs and notes affect my employee equity?

Yes, indirectly. When they convert into shares at the next round, they add to the share count and dilute everyone, including you. A large amount of SAFEs or notes with low valuation caps can dilute your ownership more than the headline round suggests.

Which is better for a startup?

SAFEs are simpler and founder-friendly (no interest or maturity pressure), which is why they're now very common at the earliest stages. Convertible notes give investors more protection through interest and a maturity date. Neither is universally better; it depends on the negotiation.

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