SAFEs (Simple Agreements for Future Equity) and convertible notes let you raise money without setting a valuation. However, SAFEs are simple warrants, while notes are debt instruments with interest rates and maturity dates that can create significant risk for founders. For most US tech startups, post-money SAFEs are the simpler, more founder-friendly standard, providing predictable dilution.
Key takeaways
- Use post-money SAFEs for your seed round; they are the founder-friendly standard.
- A convertible note is debt with a maturity date, which can bankrupt you if you don't raise a priced round in time.
- Model your "SAFE stack" in a spreadsheet to understand your true dilution before you talk to Series A investors.
- The valuation cap and discount are mutually exclusive; an investor gets whichever gives them a better price.
- An investor insisting on a note in a SAFE market is a red flag. Question their motives.
- Never raise on multiple different SAFE caps without understanding how the "waterfall" converts and impacts your ownership.
You're raising your first round. Your advisor, lawyer, or a potential investor mentions raising on "convertible instruments." Stop them right there. This vague term groups two profoundly different fundraising tools: the SAFE (Simple Agreement for Future Equity) and the convertible note .
Yes, they both get cash in the door now without setting a firm valuation on your company. But the similarity ends there. One is a straightforward warrant to buy future stock. The other is a loan with a ticking clock that can bankrupt you.
Confusing them is a classic, and costly, rookie founder mistake. Let's make sure you don't make it.
A SAFE, created by Y Combinator and now the standard for most U.S. tech startups, is a warrant—a contract giving the investor the right to buy equity in a future priced round. It is not debt.
If your company fails, SAFE investors get paid back from any remaining assets only after true debt holders, but before founders.
SAFEs are defined by two main terms, and an investor gets the benefit of whichever one gives them a better price:
Valuation Cap: The maximum valuation at which the investor's money converts into equity. This rewards their early risk. If your Series A is at a $20M valuation but their SAFE had a $10M cap, they get to buy stock at the $10M price.
Discount: A percentage discount off the price of the next priced round. This also rewards early risk. A 20% discount means if Series A investors pay $1.00 per share, the SAFE investor pays $0.80 per share.
This is the single most important detail to get right. Early SAFEs were "pre-money," which made founder dilution unpredictable. The modern standard is the "post-money" SAFE.
A post-money valuation cap means the cap is calculated after all SAFE money is added to the company's capital. This gives you, the founder, immediate clarity on how much ownership you've sold.
You raise $1M on post-money SAFEs with a $10M post-money valuation cap .
You have just sold 10% of your company (prior to the new money in the…
Frequently asked questions
- Is a SAFE better than a convertible note for a founder?
- For most early-stage US tech startups, yes. A post-money SAFE is simpler, avoids the risks of debt (like interest and maturity dates), and offers more predictable dilution math for founders.
- What is a typical valuation cap for a SAFE?
- It varies widely by stage, team, and traction. For a pre-seed round, caps might range from $5M to $15M. For a seed round, they could range from $10M to $25M or higher.
- Can you have a SAFE with no valuation cap?
- Yes, this is a "no cap" or "uncapped" SAFE, often with just a discount. Founders should avoid these, as you give away a percentage of your company at a future valuation you can't predict, offering unlimited upside to the investor for a fixed risk.
- What happens if a company fails with outstanding SAFEs?
- If the company liquidates, SAFE holders have a liquidation preference. They get their money back after secured debt holders but before founders or common stockholders, assuming any assets are left.
- Do SAFEs have pro-rata rights?
- The standard YC SAFE includes an optional pro-rata rights side letter. This gives the investor the right to maintain their ownership percentage by investing more money in your next priced round, and founders should grant this to strategic investors.
