Fundraising
SAFE (Simple Agreement for Future Equity)
A SAFE (Simple Agreement for Future Equity), created by Y Combinator, gives an investor the right to equity in a future priced round instead of shares today. It is not debt and carries no interest or maturity date.
Also known as: SAFE, SAFE note, simple agreement for future equity
Why it matters
SAFEs became the default way early startups raise because they are fast, cheap, and standardized: no valuation negotiation, no lawyers haggling over a full priced round. The investor money converts to shares later, usually at the next priced round, often with a valuation cap or discount that rewards them for being early. The catch founders underestimate is that multiple SAFEs stack, and all the dilution lands at conversion.
Worked example
An investor puts in $100,000 on a SAFE with a $5M valuation cap. At the next priced round, that $100,000 converts as if the company were worth $5M, even if the round prices higher.
Common mistakes
- Selling too many SAFEs without modeling the combined dilution at conversion.
- Confusing a SAFE (equity) with a convertible note (debt).
- Ignoring how the valuation cap affects your future ownership.
Frequently asked questions
What is a SAFE in fundraising?
A Simple Agreement for Future Equity, created by Y Combinator. An investor gives you money now in exchange for the right to equity in a future priced round. It is not debt and has no interest or maturity date.
How does a SAFE work?
The money converts into shares at the next priced round, usually with a valuation cap and/or discount that rewards the early investor. Until then, no shares change hands. The dilution lands at conversion.
What is the difference between a SAFE and a convertible note?
A SAFE is not debt; a convertible note is. Notes carry interest and a maturity date, while SAFEs do not. SAFEs are simpler and more founder-friendly, which is why they became the standard.
What is a SAFE valuation cap?
The maximum valuation at which the SAFE converts to equity, no matter how high the next round prices. A lower cap gives the investor more equity per dollar. It is a key negotiation lever.
Are SAFEs good for founders?
Generally yes, because they are fast, cheap, and standardized. The risk is selling too many without modeling the combined dilution, since it all hits at conversion. Track your cap table as you stack them.
What is the difference between pre-money and post-money SAFEs?
Post-money SAFEs (the current YC standard) fix the investor's ownership percentage more precisely, including the effect of other SAFEs. The post-money version usually means more dilution for founders than they expect.
Related terms
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Last updated 2026-06-02 · Back to the glossary