SAFE Note

SAFE note (Simple Agreement for Future Equity) is a standardized startup investment instrument created by Y Combinator in 2013 that allows founders to raise capital without immediately setting a company valuation. The investor provides cash now and receives the right to convert that investment into equity at a discounted price when the company raises a future priced equity round (such as a Series A). SAFEs are not debt: they carry no interest rate and have no maturity date, making them simpler and founder-friendlier than convertible notes.

How it works

An investor signs a SAFE and wires capital to the company. The SAFE includes a valuation cap (the maximum valuation at which the SAFE converts to equity, protecting the investor from excessive dilution if the company’s value skyrockets) and/or a discount rate (the investor converts at a set percentage below the price paid by new investors in the priced round). When a qualifying priced round occurs, SAFEs automatically convert to preferred stock at the better of the cap price or the discounted price. Post-money SAFEs (the current Y Combinator standard) calculate dilution based on the company’s valuation after SAFE investments.

Key facts

• Valuation cap: A $5M cap means the SAFE converts as if the company was valued at no more than $5M, regardless of the actual Series A valuation.
• Post-money SAFE: The current YC standard calculates the SAFE holder’s ownership percentage at time of signing, making dilution predictable for both parties.
• No maturity date: Unlike convertible notes, SAFEs do not mature and do not create debt on the balance sheet, reducing legal complexity and founder risk.

For builders

SAFEs have become the default instrument for pre-seed and seed financing in the US startup ecosystem, largely replacing convertible notes for early rounds. For founders raising a first friends-and-family or angel round, using YC’s standard SAFE documents (available for free on YC’s website) avoids legal fees and negotiation complexity. The critical decision is setting the valuation cap: too low and founders give away significant ownership at the Series A; too high and investors feel they received a poor deal relative to the eventual price.

Sources

• Y Combinator. SAFE (Simple Agreement for Future Equity) standard documents. ycombinator.com
• U.S. SEC. Exempt offerings and small-business capital raising. sec.gov
• National Venture Capital Association. Model legal documents. nvca.org
• Kauffman Foundation. Startup research and entrepreneurship data. kauffman.org
• Federal Reserve. Small Business Credit Survey. federalreserve.gov