Maximum valuation at which a SAFE or note converts to equity.
Protects early investors by setting a ceiling on conversion price regardless of future valuation.
If the next round valuation exceeds the cap, investors convert at the cap price, getting more shares.
$100k SAFE with $5M cap. Series A at $10M pre-money. Investor converts at $5M cap, getting 2% instead of 1%.
Setting caps too low (excessive dilution); not understanding post-money vs pre-money SAFEs; stacking multiple SAFEs at different caps.