What is a SAFE? (Simple Agreement for Future Equity)
Simple Agreement for Future Equity (SAFE)
Author: The Carta Team
Read time: 13 minutes
Published date: November 6, 2025
Learn the potential advantages and disadvantages of fundraising with SAFE agreements and everything you need to know before issuing SAFEs.
Contents
- What is a SAFE agreement?
- How does a SAFE agreement work?
- Understanding the key terms in a SAFE agreement
- How do SAFEs compare to convertible notes and priced rounds?
- Why do founders use SAFEs for early-stage fundraising?
- How to manage your SAFE fundraising round
- Four factors to consider before you raise a SAFE
- Advantages and disadvantages of fundraising with SAFEs
- Frequently asked questions about SAFE agreements
What is a SAFE agreement?
A SAFE (Simple Agreement for Future Equity) is a legal contract between a startup company and an investor that allows the investor to provide funding to your company now in exchange for the right to receive equity in your company at a future date—typically during your company’s next priced round or during a liquidity event.
SAFEs were first developed by Y Combinator in 2013 as an alternative to convertible notes. A SAFE agreement is a type of convertible security, but unlike debt instruments, SAFEs do not accrue interest or have a maturity date, making them an attractive fundraising option for early-stage startups.
The main purpose of a SAFE is to allow you to raise capital without needing to set a specific valuation for your startup. Using a SAFE simplifies the fundraising process for first-time founders and their first investors, allowing you to secure funding quickly and focus on building your business.
How does a SAFE agreement work?
The basic mechanic of this financing document is straightforward. An investor gives you capital, and in return, the SAFE contract promises them stock when a specific conversion event occurs in the future. This process is known as conversion, where the investor's initial investment converts into company shares.
A SAFE operates like any other type of legal contract. Key terms like a valuation cap or discount rate incentivize investors with the opportunity to receive shares at a favorable price when the SAFE converts into shares.
Understanding the key terms in a SAFE agreement
- Valuation cap: This is the maximum company valuation at which an investor's money converts into equity.
- Discount price (conversion discount): This is a percentage off the share price that the SAFE holder receives compared to the new investors in the priced round.
- Pre-money vs. post-money SAFEs: The distinction between pre-money SAFEs vs. post-money SAFEs determines when the valuation cap is applied during a priced round.
- Most Favored Nation (MFN) clause: This protects early investors by giving them the same improved terms if better terms are later issued by the startup.
How do SAFEs compare to convertible notes and priced rounds?
| Feature | SAFE | Convertible note | Priced round |
| Is it debt? | No | Yes | No |
| Maturity date? | No | Yes | No |
| Accrues interest? | No | Yes | No |
| Complexity and cost | Low | Medium | High |
The key takeaway for a founder is that a SAFE is not a loan, so it doesn't add debt to your company's balance sheet. It reduces financial pressure on your new company, letting you focus on growth without the looming obligation of debt repayment.
Why do founders use SAFEs for early-stage fundraising?
SAFEs have become the go-to investment vehicle for seed rounds in the startup ecosystem because they are built for speed and simplicity. Founders appreciate SAFEs for several reasons that make the fundraising process less of a burden:
- They are faster to execute than a priced round.
- They typically involve lower legal fees.
- They allow you to close with investors one by one on a rolling basis.
- They let you focus your time on building your business, not on complex fundraising negotiations.
How to manage your SAFE fundraising round
Managing SAFEs requires organization. Tracking individual agreements in a spreadsheet can quickly become messy. A clean, well-managed SAFE round sets the stage for a smooth transition to your next phase of growth and builds trust with your stakeholders.
Four factors to consider before you raise a SAFE
1. How much of your company’s equity do you plan to give up?
2. How much money do you want to raise in your next priced round?
3. What milestones will you use the money to reach?
4. How will you track your SAFE investments?
Advantages and disadvantages of fundraising with SAFEs
| Advantages | Disadvantages |
| SAFEs could be faster and more affordable than a priced round. | It could lead to excessive dilution. |
| They’re appealing to investors. | You may have a harder time finding investors. |
| They give you time to reach certain milestones. | They generally do not grant many of the preferred terms granted to preferred stockholders. |
| They have no interest rates. | QSBS tax benefits do not start until the SAFE converts into equity. |
Frequently asked questions about SAFE agreements
Is a SAFE agreement considered debt or equity?
A SAFE is neither debt nor a direct form of equity when you sign it; it is a contract that gives an investor the right to receive equity in the future.
What happens if a SAFE never converts?
If a company is acquired before a priced round occurs, the SAFE holder typically has the option to get their investment back or convert their investment into equity at the valuation cap.
Do investors have any rights with a SAFE?
SAFE holders do not have voting rights like stockholders do. However, they have the contractual right to receive stock in the future upon a triggering event.