What is a SAFE agreement and how does it work?
Short Answer
A SAFE (Simple Agreement for Future Equity) is a financing instrument where investors provide capital in exchange for the right to receive equity at a future priced round, typically with a valuation cap and/or discount.
Full Explanation
The SAFE was created by Y Combinator in 2013 as a simpler alternative to convertible notes for early-stage fundraising. Unlike a convertible note, a SAFE is not debt — it has no interest rate, no maturity date, and no repayment obligation. It is simply a contractual right to receive equity in the future when a triggering event occurs (typically a priced equity financing round).
SAFEs typically include two key economic terms. The valuation cap sets the maximum valuation at which the SAFE converts to equity — if the company raises at a higher valuation, the SAFE holder converts at the cap, receiving more shares per pound invested. The discount (commonly 15-25%) gives the SAFE holder a percentage reduction on the price per share paid by new investors. Some SAFEs include both mechanisms, with the investor receiving whichever produces more shares.
For example, an investor puts £100,000 into a SAFE with a £5 million cap and 20% discount. If the Series A prices the company at £10 million, the SAFE converts at the £5 million cap (the more favourable term), giving the investor twice as many shares as the Series A investors per pound invested.
SAFEs are founder-friendly because they avoid the complexity and legal costs of priced rounds, have no maturity date pressure, and do not accrue interest. However, founders should understand the dilution implications: multiple SAFEs with low caps can create significant dilution at conversion. The post-money SAFE (Y Combinator's current standard) made this more transparent by defining the cap as post-money, meaning the investor's ownership percentage is known at the time of investment.
Related Glossary Terms
Related Questions
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Further Reading
Pre-Revenue Startup Valuation: Intangible Asset Methods That Actually Work
Pre-revenue startups are notoriously difficult to value using traditional methods. Revenue multiples fail when there is no revenue. DCF models rely on projections that are mostly fiction. Intangible asset valuation offers a third path — grounded in what a startup has actually built, not what it hopes to earn.
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