What is the difference between a SAFE and a convertible note?
Short Answer
SAFEs are simpler, cheaper, and have no maturity date or interest — they convert only at a future financing event. Convertible notes are debt with interest and a maturity date, creating pressure to convert or repay.
Full Explanation
SAFEs are simpler, cheaper, and have no maturity date or interest — they convert only at a future financing event. Convertible notes are debt with interest and a maturity date, creating pressure to convert or repay.
Both SAFEs and convertible notes are bridge instruments that allow early-stage investment without immediately setting a valuation. The key differences: SAFEs are not debt; convertible notes are. Convertible notes carry interest (typically 5-10% annually) and a maturity date (usually 18-24 months), meaning if no qualifying event occurs, the company must repay principal plus interest or renegotiate terms. This creates pressure to raise a Series A and can lead to disputes if the startup does not hit milestones. SAFEs have no interest and no maturity — they simply exist until a qualifying event (usually a Series A) or the company exits. Convertible notes were the industry standard pre-2010 but SAFEs have largely displaced them for founder-friendly fundraising, particularly in the Y Combinator ecosystem. Some institutional investors still prefer convertible notes because the debt structure creates fiduciary clarity and the interest/maturity provisions incentivise the company to reach the next milestone. For founders, SAFEs are simpler; for conservative investors or larger cheques, convertible notes provide more structure.
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