A SAFE stands for Simple Agreement for Future Equity: an investment instrument created by Y Combinator that lets investors provide capital now in exchange for equity later, when a priced round occurs. Unlike convertible notes, SAFEs have no interest rate and no maturity date. The key terms are valuation cap, meaning the maximum conversion price, discount, meaning a percentage reduction on the future round price, and MFN, or most favored nation, provisions. Post-money SAFEs are the current standard.
SAFEs are the default instrument for pre-seed and seed rounds. They let you take money quickly without setting a valuation or negotiating complex terms, which matters most when you need to close a round fast.
Created by Y Combinator in 2013, SAFEs replaced convertible notes for most early-stage deals because they carry no interest rate, no maturity date, and are simpler to execute for both founders and investors.
Valuation cap is the maximum valuation at which the SAFE converts to equity, protecting the investor if your valuation increases significantly before the priced round.
Discount is a percentage reduction on the price per share at conversion, typically 10 to 20 percent.
MFN, or most favored nation, ensures the investor gets the best terms you offer to any later SAFE investors in the same round.
Pro rata rights give the investor the right to invest in future rounds to maintain their ownership percentage as the company raises more capital.
Post-money SAFEs, the YC standard since 2018, set the cap on post-money valuation, making dilution clearer for both sides. Ownership is straightforward: investment divided by the post-money cap.
Pre-money SAFEs calculate conversion based on pre-money valuation. Multiple pre-money SAFEs at different caps create complex cap table math because they dilute each other rather than diluting only the founders.
A post-money SAFE for $500,000 at a $5 million cap gives the investor 10 percent ($500,000 divided by $5 million) at conversion, regardless of how many other SAFEs are outstanding.
If you later raise a Series A at $10 million pre-money, the SAFE converts at its $5 million cap, giving that investor twice the shares they would have received at the Series A price.
Raising too much on SAFEs without tracking total dilution. Multiple SAFEs at different caps can surprise founders when they all convert at the same time.
Not understanding post-money versus pre-money mechanics. With post-money SAFEs, each new SAFE dilutes founders directly rather than previous SAFE holders.
Treating SAFEs as free money. They are deferred equity, and the dilution becomes very real the moment they convert.
On your ask slide, state the instrument type, cap, and amount you are raising, for example: Raising $1 million on post-money SAFEs at an $8 million cap.
Each SAFE holder gets a fixed ownership percentage. Founders absorb all the dilution.
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