A SAFE and a convertible note both defer the valuation conversation to the next priced round. The practical difference is a note usually accrues interest and has a maturity date; a SAFE typically has neither. Either way, the number that actually matters is what stacking two or three of them does to the cap table when they all convert at once, and that is where founders get caught out.
SAFE versus convertible note, in practice
Both instruments do the same core job: they let an investor put money in before anyone agrees on a valuation, and defer that conversation to the next priced round, where the SAFE or note converts into equity at a discount to the round price, or against a valuation cap, whichever gives the investor the better deal. The practical difference is what happens if that priced round never comes, or takes longer than expected. A convertible note usually has a maturity date and accrues interest, so it eventually forces a conversation, conversion, repayment, or a renegotiation. A SAFE typically has neither, which is simpler on the way in and can leave a founder unsure what happens if the next round is years away rather than months.
Why the stack matters more than the instrument
The instrument choice gets most of the attention; the more common problem I see downstream, once a first finance hire is in the seat, is founders who raised two or three SAFEs or notes at different caps without modelling what happens when they all convert at the same priced round. Each one converts independently against its own cap and discount, and the combined dilution can surprise a founder who only ever looked at them one at a time. Modelling that stack before the next round, not during it, is exactly the kind of cap-table work a strong first finance hire owns.
| A SAFE | A priced equity round | |
|---|---|---|
| Valuation | Deferred to the next priced round, via a cap or discount. | Set now, by negotiation. |
| Speed to close | Fast: a short, standardised document. | Slower: full diligence, term sheet, legal documentation. |
| Dilution clarity | Unclear until it converts, especially with multiple SAFEs stacked. | Clear immediately: shares issued at a known price. |
| Investor rights | Minimal until conversion. | Board seats, information rights and protective provisions negotiated upfront. |
I set out why a clean, agreed cap table is the fastest exit-readiness signal there is, SAFEs and notes included.
Once a SAFE converts, it is the same terms worth reading twice that I cover in what is a term sheet.
Common questions
What does SAFE stand for?
Simple agreement for future equity: an investor puts in cash now for the right to receive equity later, when the company raises a priced round, at a discount or capped valuation rather than a price agreed today.
Is a SAFE the same as a convertible note?
They work the same way in principle, both defer the valuation conversation to the next priced round, but a convertible note usually accrues interest and carries a maturity date, which eventually forces conversion, repayment or renegotiation. A SAFE typically has neither. Australian early-stage rounds use convertible notes more often than SAFEs.
What is the biggest risk with SAFEs or convertible notes?
Stacking several of them at different caps without modelling what happens when they all convert at the same priced round. Each converts independently, and the combined dilution regularly surprises founders who only looked at them one at a time.
Who should model a SAFE or note stack before a priced round?
The finance seat. Modelling the combined conversion and dilution impact before the round, not during it, is core cap-table work and exactly what a strong first finance hire should own.
References
- What I see downstream, once a first finance hire is in the seat: the problem is rarely the instrument itself, it is founders who stacked two or three SAFEs or notes at different caps without ever modelling the combined dilution.
These guides set out how we see it, drawn from the searches we run and the finance leaders we place. They are general information about the market, not financial, accounting or legal advice, and they are no substitute for advice on your own circumstances.