Simple Agreement for Future Equity (SAFE)

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.

Recent data shows just how dominant it has become in early-stage fundraising. For the earliest pre-seed rounds, SAFEs comprised a record high of 90% of all deals on Carta in the first quarter of 2025. Even at the seed stage, where priced rounds are also an option, SAFEs have become the go-to investment vehicle. Over a recent 12-month period, SAFEs were the most popular choice, accounting for 64% of all seed rounds, compared to just 27% for priced equity and 10% for convertible notes.

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.

This future event is often called a triggering event. For most startups, the triggering event is the company's first priced round of equity financing. A priced round is when you sell shares to new investors at a set price-per-share, which establishes a formal valuation for your company. At that moment, the investor's SAFE investment converts into shares of stock, making them a part-owner of your company.

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.

SAFEs are flexible, as they don’t carry interest or have a maturity date, which makes them more appealing for startups that want to avoid debt or immediate shareholder obligations. However, until the SAFE converts, investors have no investor rights, voting rights, or ownership in the company because they are not yet shareholders. Once a triggering event occurs, the SAFE converts to equity based on the agreed terms, allowing investors to receive shares at a lower cost than future investors.

Understanding the key terms in a SAFE agreement

While the concept of a SAFE is simple, the agreement contains several key terms that can feel like jargon at first. Understanding these few components is straightforward and will give you confidence in your fundraising conversations. Knowing these terms helps you speak the same language as your investors and negotiate terms that are fair for both you and your early backers.

• Valuation cap: This is the maximum company valuation at which an investor's money converts into equity. Think of it as a ceiling on the price the SAFE investor will pay for their shares, regardless of how high the company's valuation is in the priced round. If the valuation of the company is higher than the valuation cap of the SAFE, the SAFE will convert into equity at a lower price-per-share than the price paid by investors in the priced round. It rewards your earliest investors for taking a risk on your company before its value was proven.

• 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. A SAFE can have a valuation cap, a discount, or both. While most SAFEs include a valuation cap, recent data shows that nearly a third offer both a cap and a discount, giving your earliest backers multiple ways to be rewarded for their risk. The investor will typically get whichever term gives them a better price on their shares, which compensates them for their early belief in your vision.

• 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. A pre-money SAFE calculates ownership based on the valuation before the new funding is added, while a post-money SAFE calculates it after. Post-money SAFEs are now the standard for early-stage fundraising. In a major shift from just a few years ago, 87% of all SAFEs issued in the third quarter of 2024 were post-money SAFEs. Post-money SAFEs give founders a much clearer view of their ownership dilution upfront, which helps in planning and communicating with your team. However, post-money SAFEs tend to dilute the founders' ownership more in future rounds.

• Most Favored Nation (MFN) clause: This is a clause that protects early investors. If you later issue another SAFE on better terms, like a lower valuation cap or a higher discount, the MFN clause automatically gives the original investor those same improved terms. This protects your first supporters from being disadvantaged by later deals. Once an investor’s SAFE converts into stock, however, the MFN clause no longer applies.

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How do SAFEs compare to convertible notes and priced rounds?

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, which is important for maintaining clean books for a future financial audit. It also doesn't come with a maturity date, which is a deadline for repayment that is common with convertible notes. This structure reduces financial pressure on your new company, letting you focus on growth without the looming obligation of a debt repayment.

SAFEs vs. priced rounds

A company’s valuation and the type of equity exchanged set SAFEs apart from priced equity rounds.

• Company valuations: During a priced round, such as a Series A round, an investor gives funds based on a negotiated valuation of the company. By contrast, a SAFE agreement does not rely on a valuation. This comes in handy for very early-stage companies that often don’t have a value for their company yet. A priced round is therefore more structured, while SAFEs are typically looser and more flexible.

• Equity type: In exchange for the money they give you during a priced round, you give investors shares of equity in your startup. When fundraising with SAFEs, however, you don’t give investors anything right away; instead, you promise them future shares of stock in exchange for their investment today.

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 (like a SAFE), 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 (also known as an expiration date). A SAFE does not come with an interest rate or maturity date, but it typically includes either a valuation cap, a conversion discount, or both to protect investors.

• Conversion: The timing of when equity converts is a key differentiator between SAFEs and convertible notes; both instruments convert equity at different times. While SAFEs convert into equity during the next priced round (no matter how much money your company raises), convertible notes typically convert into equity only when you raise a certain amount of capital in a priced round ( for example, $1 million).

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. This is an important advantage for founders, especially when traditional venture funding is more scarce. For the earliest pre-seed rounds, SAFEs comprised a record high of 90% of all deals on Carta in the first quarter of 2025. Even at the seed stage, where priced rounds are also an option, SAFEs were the most popular choice, accounting for 64% of all seed rounds, compared to 27% for priced equity and 10% for convertible notes. They are designed from the founder's point of view, directly addressing the needs of a company just getting started. This makes them an effective tool for securing your first round of capital and building momentum.

Founders appreciate SAFEs for several reasons that make the fundraising process less of a burden:

• They are faster to execute than a priced round, which involves more negotiation and legal paperwork.

• They typically involve lower legal fees, saving your company precious cash that can be used for product development and building your team.

• They allow you to close with investors one by one on a rolling basis, rather than needing everyone to commit at once.

• They let you focus your time on building your business, not on complex fundraising negotiations.

When do startups prefer SAFEs?

Fundraising with SAFEs may be the right choice if your company:

• Is not prepared to negotiate a formal valuation with venture capital (VC) funds

• Wants more flexibility

When an early-stage company does not have a set valuation, or when a founder is not ready to issue investors preferred stock in exchange for capital, using SAFEs often makes more sense. Convertible notes and SAFEs, on the other hand, offer more flexibility and control if you’re still figuring out where your company is headed.

What type of company can issue a SAFE?

If you’re considering fundraising with SAFEs, your company generally needs to be classified as a C corporation (C-corp), meaning you have a set ownership structure and pay corporate income taxes on your profits and losses. There are instances where LLCs may be able to raise SAFEs, but the process is more complicated. It’s generally easier to fundraise as a C-corp rather than an LLC, since investors view LLCs as inherently riskier.

It’s a good idea to consult your lawyer for more information on the regulations and process of issuing SAFEs.

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 majority of $3 million-$4 million rounds from the first half of 2025 were raised on SAFEs or convertible notes, not priced equity. SAFEs are easier to execute, but can be difficult to manage manually. Tracking dozens of individual agreements in a spreadsheet can quickly become messy and lead to costly errors during conversion. A disorganized process can create confusion and undermine investor confidence, which can in turn cause problems in future financing rounds.

Doing it right from the start prevents future headaches and shows investors that you are professional and detail-oriented. A clean, well-managed SAFE round sets the stage for a smooth transition to your next phase of growth, builds a foundation of trust with your stakeholders, and can even help them qualify for tax benefits with a future qualified small business stock (QSBS) attestation.

Modeling your SAFE conversion and dilution

Instead of trying to manually calculate how several SAFEs will convert and affect ownership, founders can use a SAFE and convertible note calculator to model different scenarios. The calculations can be complex, and small mistakes can lead to misunderstandings about who will own what. This uncertainty is a major source of anxiety for founders who want to maintain control and provide clarity to their team.

Issuing and tracking your SAFEs

The old way of managing SAFEs involved emailing PDF documents and chasing signatures. This process is inefficient and leaves room for important details to get lost, creating a messy paper trail that can be difficult to audit later. A modern, professional approach streamlines these steps into a single, secure workflow.

With Carta's SAFE Financing platform, you can use standard Y Combinator templates, Carta versions of the SAFEs, or your own custom agreements. You can create agreements, collect signatures, and receive funding all through one connected platform. This makes the SAFE funding process seamless for both you and your investors. As Amber Allen, Founder of Double A Labs, notes, "Raising capital with SAFEs on Carta was a breeze."

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Four factors to consider before you raise a SAFE

Before you begin fundraising with SAFEs, take some time to reflect on your company’s goals and equity distribution plan. Answering the following questions will give you a better idea of whether or not SAFEs are a good fundraising solution for your company.

1. How much of your company’s equity do you plan to give up?

The more investors you bring in and the more money you raise via SAFEs, the more your shares will be diluted. It can be tricky to know how much equity you’re losing when you issue a SAFE, since you’re not actually giving away a specific number of shares of stock upfront.

However, it’s crucial to at least estimate how much your shares will be diluted once the SAFE converts into equity. The Carta team has created a free SAFE conversion calculator to help you with these estimates.

2. How much money do you want to raise in your next priced round?

You may not be able to predict exactly how much money you’ll raise during a future financing round, but you should have a clear idea of your fundraising goals.

If you raise too much money via SAFEs, you could end up over-diluting your Series A investors when those SAFEs convert into equity. Saving a certain amount of equity for your next priced round, however, can help ensure future investors stay interested and motivated.

3. What milestones will you use the money to reach?

During your seed round, you want to raise enough money to reach the specific milestones that will increase your company valuation and set you up for success during your Series A round. Milestones could be achieving an internal growth goal, launching a product within a certain timeframe, hitting a specific fundraising target, or attracting a particular investor.

Defining your milestones helps you set more realistic fundraising goals, so you can raise enough money to grow your company while avoiding excessive dilution.

4. How will you track your SAFE investments?

A common mistake many early-stage entrepreneurs make is neglecting to properly record their outstanding SAFEs. Each SAFE you issue might have a different valuation cap or conversion discount, and if you don’t keep track of these details, you can end up diluting your ownership more than you wanted to.

Fortunately, staying on top of your various SAFE investments doesn’t have to be complicated. Carta can help you track all your investments with our cap table management software.

Advantages and disadvantages of fundraising with SAFEs

As with any fundraising method, there are both benefits and drawbacks to raising money via SAFEs.

From SAFEs to scale: Your partner in growth

Issuing a SAFE is typically the beginning of your company's fundraising journey, which will later involve priced rounds and issuing preferred stock. As you hire employees and grant them equity, raise more capital, and grow, the real work is maintaining a perfect, up-to-date record of ownership and adhering to accounting standards like ASC 718. This record, known as a cap table, is the single source of truth for your company's equity.

Carta's cap table management software acts as your company's official ownership record. When you issue a SAFE on the platform, your cap table updates automatically. This eliminates manual data entry, keeps you organized, and helps you stay ready for your next VC round.

Carta grows with you, supporting your next steps as your company matures. Whether you're preparing for a priced round with deal closings or getting your first 409A valuation, the platform provides the tools you need. Carta is your long-term partner from the first SAFE to a future exit, helping you manage your equity with professionalism and confidence. Request a demo to see how.

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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. It is a contract that gives an investor the right to receive equity in the future, but it doesn't represent current ownership or a loan that needs to be repaid.

What happens if a SAFE never converts?

If the company is acquired before a priced round occurs (an event that would trigger the liquidation preferences of other shareholders), the SAFE holder typically has the option to get their investment back or convert their investment into equity at the valuation cap. The specific terms are outlined in the SAFE agreement itself.

Do investors have any rights with a SAFE?

SAFE holders do not have voting rights like stockholders do. However, the SAFE agreement gives them the contractual right to receive stock in the future upon a triggering event, which protects their investment.

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

In startup accelerators, equity deals give the accelerator immediate ownership and rights in your startup in exchange for investment, while SAFE deals provide funding now but delay ownership, dilution, and shareholder rights until a future funding round when the SAFE converts to equity.

What legal documents are required for a SAFE?

You mainly need the SAFE agreement, with board consent and updated cap table. Unlike equity rounds, no complex legal documents are required.

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, showing each investor, their investment amount, and the terms (like valuation cap or discount). They do not count as outstanding shares until conversion.

What are the typical triggers for converting a SAFE into equity?

A SAFE converts into equity during a priced equity financing round. SAFEs specify payouts to SAFE investors in the event of a company acquisition (liquidity event) or company shutdown (dissolution event).

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