Plain post-money SAFE. Cap, discount, close schedule.
A $3.0M seed extension on a $18.0M post-money cap with a 20% discount. No board seat, no protective provisions, nothing beyond MFN and a pro-rata side letter for the larger checks. Target close August 31, 2026.
The instrument is a post-money SAFE on the YC standard form, unmodified. Post-money rather than pre-money because the math is transparent to every investor on the cap table (ownership on conversion is exactly the SAFE amount divided by the cap) and because the Series A lead will price the round against a clean, readable stack rather than a thicket of pre-money overlaps.
SAFE rather than priced preferred because we are raising inside a seed extension, not a priced seed. A priced round at this stage would force an early 409A, a board seat conversation, protective provisions, and two months of legal that does not make the product better. The SAFE defers that work to the Series A, which is where those mechanics earn their keep. The cap is the anchor; the discount is the kicker; everything else waits.
No maturity date, no interest accrual, no MFN-breaking side letters, no board observer seats. The full document is the unmodified YC post-money SAFE with a single pro-rata side letter for checks at or above $250K. Counsel has reviewed.
Cap and discount, worked at three Series A prices
Each row fixes a Series A post-money price. Columns show the per-share price the SAFE holder receives under the cap, under the discount, and the effective price (the lower of the two). A SAFE investor always gets the lower.
| Series A post-money | Series A price | Price at cap | Price at 20% discount | SAFE price | ||
|---|---|---|---|---|---|---|
| Series A at $25M | $25.0M | $1.000 | $0.720 | $0.800 | $0.720 (cap) | |
| Series A at $36M | $36.0M | $1.000 | $0.500 | $0.800 | $0.500 (cap) | |
| Series A at $20M | $20.0M | $1.000 | $0.900 | $0.800 | $0.800 (discount) | |
| Series A at $18M (flat) | $18.0M | $1.000 | $1.000 | $0.800 | $0.800 (discount) |
Worked examples ignore option-pool top-ups and assume a single pre-A SAFE class. The real conversion math includes the pool true-up; the ranking of cap vs discount is the same either way. The SAFE always takes the lower of the two.
The cap is the anchor on upside, the discount is the anchor on downside. The SAFE holder always takes the lower implied price. A generous cap paired with a small discount (10%) is a common alternative; we chose 20% because it gives an honest discount in the flat-round case without requiring the Series A to be a home run to be a good seed outcome.