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.

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. This is a common challenge for new companies that have not yet established a track record or generated revenue. 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. The Securities and Exchange Commission (SEC) notes that SAFEs are designed to automatically convert into equity upon a defined triggering event, like a priced financing round.

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 is a clause that protects early investors. If you later issue another SAFE on better terms, the MFN clause automatically gives the original investor those same improved terms.

How do SAFEs compare to convertible notes and priced rounds?

SAFEs vs. priced rounds

• Company valuations: During a priced round, an investor gives funds based on a negotiated valuation of the company. By contrast, a SAFE agreement does not rely on a valuation.

SAFEs vs. convertible notes

There are two key differences between SAFEs and convertible notes: debt and conversion times.

• Debt: A convertible note is a type of convertible instrument, meaning it converts into equity at a particular time. However, unlike a SAFE, a note is considered debt, which means it comes with an interest rate and maturity date.
• Conversion: The timing of when equity converts is a key differentiator between SAFEs and convertible notes.

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:

• 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.

When do startups prefer SAFEs?

Fundraising with SAFEs may be the right choice if your company is not prepared to negotiate a formal valuation.

What type of company can issue a SAFE?

Your company generally needs to be classified as a C corporation ( C-corp).

How to manage your SAFE fundraising round

While SAFEs simplify startup financing, managing them requires organization. Early-stage fundraising often involves many small checks. A clean, well-managed SAFE round sets the stage for a smooth transition to your next phase of growth.

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

Frequently asked questions about SAFE agreements

Is a SAFE agreement considered debt or equity?

A SAFE is a unique financial instrument that is neither debt nor a direct form of equity when you sign it.

What happens if a SAFE never converts?

If the 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.

What are the differences between equity and SAFE deals in accelerators?

In startup accelerators, equity deals give the accelerator immediate ownership, while SAFE deals provide funding now but delay ownership until a future funding round.

What legal documents are required for a SAFE?

You mainly need the SAFE agreement, with board consent and updated cap table.

How do you handle SAFEs on your cap table when fundraising?

SAFEs are recorded on your cap table as separate non-equity line items until they convert into equity.