SAFE vs Convertible Note: Which Is Better for Your Startup?

How they work

Both SAFEs and convertible notes are instruments that let startups raise money without setting a valuation. The investor gives you money now, and it converts to equity later — typically at a discount to the next priced round.

The key difference: a convertible note is debt (it accrues interest and has a maturity date). A SAFE is not debt (no interest, no maturity, no repayment obligation).

When SAFEs are better

SAFEs are simpler, faster, and cheaper to execute. There’s no interest accrual, no maturity date pressure, and the standard YC SAFE is a well-understood template.

Use a SAFE when: you’re raising a small pre-seed round, speed matters, you want to avoid debt on your balance sheet, and your investors are familiar with the SAFE format.

When convertible notes are better

Convertible notes give investors more protection: interest accrual (typically 5–8% annually), a maturity date that creates urgency to convert or repay, and potential seniority in a liquidation event.

Use a convertible note when: investors demand it, you’re raising from more traditional angel investors, you need to demonstrate traction within a specific timeline, or the round is large enough that debt treatment matters.

Key terms to negotiate in both

Valuation cap: the maximum price at which the investment converts. Lower cap = better for investors. Higher cap = better for founders.

Discount rate: typically 15–20%. The investor gets shares at a discount to the next round’s price per share.

Pro-rata rights: the investor’s right to maintain their ownership percentage in future rounds.

MFN clause (SAFE only): if you issue SAFEs with better terms later, earlier investors get those better terms automatically.