Comparison
SAFE vs Convertible Note
SAFEs and convertible notes both convert to equity at a future priced round, but they differ in key ways: SAFEs have no interest or maturity date, while convertible notes are debt instruments that accrue interest and have a repayment deadline.
Key difference: A SAFE is not debt — it has no interest rate, no maturity date, and no repayment obligation. A convertible note is debt that accrues interest and must be repaid or converted by a deadline.
What Is SAFE?
A SAFE (Simple Agreement for Future Equity) is a fundraising instrument that gives investors the right to receive equity at a future priced round. Created by Y Combinator in 2013, SAFEs are the standard instrument for pre-seed and seed rounds. They convert based on a valuation cap and/or discount rate.
What Is Convertible Note?
A convertible note is a short-term debt instrument that converts to equity at a future financing event. Unlike SAFEs, notes accrue interest (typically 5-8%) and have a maturity date (12-24 months). If the note matures without a conversion event, the investor can demand repayment.
Side-by-Side Comparison
| Dimension | SAFE | Convertible Note |
|---|---|---|
| Legal nature | Equity instrument (not debt) | Debt instrument (loan) |
| Interest rate | None | 5-8% annually |
| Maturity date | None | 12-24 months typically |
| Conversion trigger | Next priced round | Next priced round or maturity |
| Legal complexity | Simple (2-4 pages) | More complex (5-10 pages) |
| Legal cost | $0-2K (standard template) | $2K-5K |
| Valuation cap | Yes (standard) | Yes (common) |
| Discount rate | Optional (15-25%) | Common (15-25%) |
| MFN clause | Common in post-money SAFEs | Less common |
| Default risk | None (no repayment obligation) | Investor can demand repayment at maturity |
When to Choose SAFE
- ✓Raising pre-seed or seed (under $3M)
- ✓Want simplicity and speed (can close in days)
- ✓Don't want debt on your balance sheet
- ✓Rolling close — adding investors over weeks/months
- ✓Standard YC-backed company (investors expect SAFEs)
When to Choose Convertible Note
- ✓Investor requires debt structure (some institutional investors)
- ✓Want to set a hard deadline for conversion (forcing function)
- ✓Raising from investors unfamiliar with SAFEs
- ✓Specific tax advantages in your jurisdiction
- ✓Bridge round between priced rounds
Frequently Asked Questions
Which is more founder-friendly, SAFE or convertible note?
SAFEs are generally more founder-friendly because they have no interest accrual, no maturity date pressure, and simpler legal terms. Convertible notes create debt obligations and a ticking clock toward maturity.
Can I use both SAFEs and convertible notes in the same round?
Technically yes, but it's not recommended. Mixing instruments creates cap table complexity when they convert. Choose one instrument for your entire round.
Do most startups use SAFEs or convertible notes in 2026?
SAFEs dominate. An estimated 80-90% of pre-seed and seed rounds use SAFEs, primarily the post-money SAFE template from Y Combinator. Convertible notes are still used in some regions and by certain investor types.