Your seed funding round sets the trajectory for everything that follows, like your runway, your team size, and your path to product-market fit.

Get the structure right and you’ll create substantial momentum toward a Series A round. Miss the mark and you risk burning through capital without productive milestones to show for it.

To further up the ante, the seed funding landscape has also significantly shifted in the last couple of years. According to Carta's State of Private Markets 2025 report, the median post-money seed valuation climbed to $24 million, a 33% year-over-year increase—yet, seed-stage startups closed 23% fewer rounds in 2025 than the year before. A new “seed-strapping” model has emerged that melds bootstrapping with venture-backed scaling. As a result, fewer companies are getting funded, but those that do are commanding stronger terms.

For founders, this means preparation, precision and creative thinking around capital sources are increasingly vital.

This guide is built for founders who already understand the mechanics of a raise and are looking for an edge, whether that's smarter financial modeling, a more diversified capital stack, or strategies for tapping into funding channels most founders overlook (like IRA-based capital).

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Signs you may be ready to raise a seed round

Not every startup that can raise a seed round is actually ready. Planning a raise too early can dilute your business and result in a lower valuation. However, waiting too long can leave you short of runway before the round closes.

According to DocSend data, roughly 37% of successful founders close a seed round within six weeks, but 31% of founders said theirs took 19 weeks or longer. That variance ultimately comes down to readiness.

Here are some signals that it's time to go to market for seed capital.

You have documented proof of demand 

This doesn't always mean revenue. Letters of intent, signed pilot agreements, a waitlist with meaningful engagement, or validated customer discovery interviews can all indicate you're moving in the right direction. But the evidence needs to be specific and external. Investors have already heard plenty of founders say "everyone we've talked to loves this." Prior to starting a seed round, it’s crucial to have clear indicators that people believe in the company at its current phase enough to put their money behind the vision for future growth.

You know exactly what the capital will unlock 

The strongest seed pitches articulate a clear milestone, like reaching a specific MRR target, shipping a product version that unlocks enterprise customers, or expanding into a second market. From there, create a timeline and map how capital can get you there. Investors want to see how this round gets you to Series A readiness, not just how it keeps the lights on.

Your team can execute on the plan. 

Investors at the seed stage are investing in people. A founding team with complementary skill sets, relevant domain expertise and a track record of building together is meaningfully more fundable. If there are gaps, be upfront about them and explain how the raise addresses them.

You've stress-tested your financial assumptions 

Projections will change, and most sophisticated investors expect that. What matters is that the assumptions behind them are credible. Make your projections reasonable and achievable. If your model assumes a $0 customer acquisition cost or 95% gross margins in year one, you'll lose credibility with those same investors before the conversation even starts.

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How is a seed funding round different from other funding stages?

The once-defined boundaries between funding stages have blurred. Pre-seed rounds are getting larger, seed rounds are stretching into territory that used to belong to Series A, and the median time between a seed round and a Series A has extended to roughly 2.1 years as of Q4 2024. Back in Q4 2021, that timeline was just 1.2 years.

Understanding where seed fits in the broader lifecycle is essential for structuring a raise that matches your company's actual growth stage. Here's how pre-seed, seed and Series A rounds typically compare:

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Sources—Carta State of Private Markets; Forum Ventures State of the VC Market (2024); Crunchbase Seed Funding Data (2024); Metal.so Pre-Seed Funding Benchmarks (2025); Flowjam Seed Round Valuation Guide (2025).

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A few things stand out in the table above.

First, the gap between seed and Series A expectations has widened. Investors looking at Series A companies increasingly want proven, repeatable revenue growth and not just promising signals. For founders, this means your seed round needs to carry you further than it used to. Plan for 18–24 months of runway instead of 12.

Second, Simple Agreements for Future Equity (SAFEs) have become the dominant instrument at both pre-seed and seed. Carta data shows that roughly 64% of all seed rounds used SAFEs from Q4 2023 through Q3 2024, with priced equity accounting for 27% and convertible notes about 10%. The smaller the round, the more likely it is to be structured as a SAFE.

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Work backward from your milestone for seed fund financial modeling

One of the most common mistakes experienced founders make is anchoring their raise target to comparable round sizes. Mirroring valuations from other seed rounds in the industry is unlikely to be viewed as a sound strategy by potential investors. It’s simply benchmarking without context.

Instead, start with the milestone you need to hit, then work backwards. Figure out the team, infrastructure and timeline it takes to get there, and build your raise target from there. This also forces you to think clearly about dilution, or the reduction in your ownership percentage as new shares are issued. The more you raise, the more equity you give up and the smaller your stake becomes. Keep in mind that the valuation you set now shapes your leverage at the Series A stage.

Here's a framework:

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Founders typically give up a fair chunk of equity in a single seed round. Sometimes it’s as little as 12%, and sometimes it’s as high as 25%. That range has held relatively steady even as round sizes have grown. If you're raising multiple SAFEs or convertible instruments at different valuation caps, model the cumulative dilution across all of them prior to your next priced round. Stacking SAFEs without tracking total dilution is one of the fastest ways to end up with less ownership than you expected at Series A.

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Types of seed funding to consider

The most effective seed rounds draw from multiple sources of capital. Diversifying your capital mix reduces concentration risk, widens the range of expertise on your cap table, and can create urgency among investors who see momentum building from multiple directions.

Bootstrapping

When a founder “bootstraps,” they lean on personal funds or early cash flow before accepting outside investments. This remains one of the most underrated strategies in venture, as it creates leverage for future funding rounds. For example, a founder who can show $20,000 in monthly recurring revenue generated with zero outside funding is in a meaningfully different position than one raising funds based on their pitch deck alone.

Sarah Blakely, founder of Spanx, is a prime example of someone who did just that. She founded the company with $5,000 of her own savings and built it from the ground up on her own: no outside investors, no dilution. At the time majority ownership of Spanx was acquired by Blackstone in 2021, the company was valued at over a billion dollars, and it was 100% Blakely’s to sell. 

Bootstrapping, even partially, demonstrates conviction, gives you real data to strengthen your negotiating position, and preserves equity for later rounds when your valuation will likely be higher.

Friends and family (and IRA-based capital)

Friends and family rounds are often the first external capital a startup brings in. However, there's a practical barrier many founders encounter: The people who believe in you the most may not have $25,000–$50,000 - or even $1,000 - in flexible cash to write a check.

This is where IRA-based investing can change the equation.

With more than $18 trillion held in U.S. IRAs as of mid-2025, IRAs represent one of the largest pools of investable capital in the country. But most investors aren’t aware they can use those funds to invest in private market opportunities such as a seed round. According to Alto's own research, nearly 70% of investors aren't using IRAs to hold alternatives, and nearly half say the process feels too confusing or opaque.

Platforms like Alto's are designed to remove that friction. Startups can raise capital directly from investors' self-directed IRAs, whether they’re Traditional, Roth or SEP. For your friends, family and early supporters, this means they can participate in your seed round using retirement capital they might otherwise leave in traditional public market investments. 

For founders, it unlocks startup capital from a broader base without the overhead of courting entirely new investor relationships.

Kacie Connors, Director of Partner Success at Alto, weighs in on the value IRAs can offer: “For family and friends looking to show their support, the ability to invest through an IRA can be a gamechanger. Instead of having to tap into their vacation fund or childcare budget, they can leverage tax-advantaged retirement dollars that are already earmarked for longer-term use. So founders get access to a wider, largely untapped funding stream, and investors get access to a pathway for backing a person and emerging company they believe in without compromising their liquidity.”

Through Alto, issuers have raised capital across 3,000 startup deals, ranging from $1,000 all the way to $250,000+ per investment. With 16% year-over-year growth in IRA-funded startup raises, what was once a niche capital raising strategy is becoming a mainstream approach.

Angel investors

High-conviction individuals (“angels”) who invest their own capital remain a cornerstone of seed-stage fundraising. The best angel investors bring more than money; they bring pattern recognition from operating in your industry, warm introductions to potential customers or later-stage investors, and hands-on support during critical early decisions.

Angels often set the pace for a seed round. A check from a credible angel can build the momentum that attracts institutional capital.

Angel investors can also invest with a self-directed IRA. For an angel with significant retirement savings, using IRA capital via a platform like Alto can offer potential tax advantages, which makes it easier for them to say “yes” to your deal. It's also worth mentioning this option to prospective angels who may not be familiar with it.

Venture capital funds

Institutional seed-stage venture capital funds (VCs) bring structured capital, governance and signaling power. A seed check from a well-known fund can forge a smooth path to Series A. The right VC can offer the benefits of a good reputation in addition to operational support.

That said, funding from VCs comes with expectations such as governance seats, reporting obligations, and an implied timeline to reach the next milestone, to name a few.

According to Crunchbase data, seed funding rounds above $5 million have accounted for a growing share of total seed dollars since 2022, driven in part by institutional funds writing larger checks earlier. This trend has raised the bar for what it takes to attract a VC-led seed round, but it has also created more opportunity for founders who can meet those expectations.

Convertible instruments: SAFEs and convertible notes

SAFEs (Simple Agreements for Future Equity) and convertible notes are the most common instruments used in seed rounds. As noted above, SAFEs have become the dominant choice, particularly post-money SAFEs that give investors a fixed ownership percentage at conversion.

The key distinction for founders is that post-money SAFEs make dilution more predictable upfront, but stacking multiple SAFEs at different caps can create complexity at conversion. Convertible notes carry a repayment obligation if the company doesn't raise a priced round before maturity. Both instruments have their place, and the right choice depends on your timeline, investor base and comfort with complexity.

Priced seed equity rounds (preferred stock)

For larger seed rounds (more than $3 million) a priced equity round may make more sense. Priced rounds establish a formal valuation, issue preferred stock, and set clear governance terms. They involve more legal overhead, but they provide cleaner cap tables and less ambiguity heading into a Series A.

If your lead investor is an institutional fund, they may prefer (or require) a priced round.

Accelerators and incubators

Programs like Y Combinator, Techstars and sector-specific accelerators offer more than just capital. They provide structured mentorship, peer networks, and a demo day that puts you in front of multiple investors at once.

For founders who haven't yet raised institutional capital, an accelerator can be a strong on-ramp. However, the equity cost (typically 5–10%) and the time commitment merit careful evaluation before making a decision.

Non-dilutive capital: Grants, credits and revenue-based financing

Non-dilutive funding sources can meaningfully extend your runway without giving up equity. These typically include:

• SBIR/STTR grants
• State economic development programs
• Cloud credits (AWS, Google Cloud, Azure startup programs)
• Revenue-based financing

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These sources work particularly well in combination with a priced or SAFE-based round because they reduce how much dilutive capital you need to raise to hit the same milestone. For founders in regulated industries or deep tech, government grants can also serve as a credibility signal for investors.

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Tips for how to raise a successful seed round

The mechanics of running a seed raise are well-documented. What separates founders who close efficiently from those who spend months in limbo often comes down to discipline and strategy.

Build investor relationships before you need them 

The strongest seed rounds don't begin the day you decide to raise. Instead, great rounds are the result of months of relationship-building via monthly update emails to prospective investors, conversations at events, and thoughtful engagement with the firms you'd want to work with. When you do flip the switch to active fundraising, warm leads inevitably close faster than cold outreach.

Create urgency through momentum, not pressure

Investors respond to signals that a round is moving. If you secure a lead investor or close early commitments, communicate that to the rest of your pipeline. Some founders use rolling closes at gradually increasing valuation caps to create natural urgency. The goal isn't to pressure anyone; it's to make the cost of waiting visible.

Diversify your capital sources

The most resilient seed rounds combine multiple types of capital, including institutional, angel, IRA-based and non-dilutive. This diversification reduces dependency on any single investor and widens the pool of people who have a stake in your success. 

For example, offering interested parties the option to invest through self-directed IRAs opens your round to capital that would otherwise sit in traditional public market portfolios. At Alto, 67% of 2025 investments came from repeat investors, demonstrating that IRA-based capital creates long-term, committed backers.

Kacie notes, “For an increasing number of investors, startup investing is no longer a one-and-done. It’s evolved into a dedicated portfolio allocation made possible with smaller check sizes spread across a basket of investments. Using a self-directed IRA is a critical part of the strategy because it offers these investors tax advantages and streamlined access to diversification, while drawing from an account where a significant portion of their capital already sits; capital that is reserved for longer-term use that may align with the timelines of startup investing.”

Know your numbers cold

Experienced investors will probe your financial model, your unit economics, and your assumptions. While they don't expect you to have all the answers, you need to demonstrate intellectual rigor. Knowing your customer acquisition cost, burn rate, runway at various staffing scenarios, and how you arrived at your valuation will set you apart.

Keep your cap table clean

Every investor you add at seed is someone who will be on your cap table at Series A, Series B and beyond. Be intentional about who you bring in. A clean cap table with well-understood terms signals professionalism to later-stage investors.

Plan for a longer path to Series A

The median time between seed and Series A has stretched to over two years. Carta reported that more than 40% of all seed and Series A financings in Q1 2024 were bridge rounds, meaning many companies are running out of initial runway before hitting Series A benchmarks. 

To prevent that scenario, seek enough seed capital for 18-24 months and be prepared for the possibility that you may need a bridge round if milestones take longer than expected.

Kacie comments, “Founders in the seed or pre-seed stage who have a preferred self-directed IRA provider tend to have a more efficient fundraising experience. Each self-directed IRA custodian has unique processes for facilitating IRA investments. For investors interested in using their IRA, having a recommendation for a single provider with whom you have a clear, repeatable process for facilitating investments - and who is investor-friendly in terms of pricing and customer service - can make the difference between fueling growth through the retirement channel or hitting a roadblock.” 

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How Alto can help unlock additional seed round funding

For most founders, the fundraising conversation centers on the same set of capital sources like VCs, angels, and personal networks. However, founders can pursue the underused funds sitting in Americans’ retirement accounts.

Alto makes it possible for investors to use their Traditional, Roth or SEP IRA funds to invest directly in private offerings like your seed round. Through Alto's platform, you can unlock startup capital from a broader base of investors, including friends, family, and angels who may have substantial retirement savings but limited liquid capital available for private market investments.

According to Kacie, “ Many founders who have discovered Alto didn’t realize that using an IRA was an option they could present to potential investors. Likewise, investors are excited to learn they can activate their retirement capital to support a business they really care about. It’s a win-win.” 

The process from account opening to withdrawing funds is straightforward, no tech integration required. Many founders can set up their raises in just a few minutes, and behind the scenes, Alto handles investor onboarding, rollovers and transfers, compliance, reporting and direct support.

Learn more about how Alto can be part of your seed round strategy at altoira.com/raise-capital-with-self-directed-iras, or start your raise today.

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Seed funding round FAQs

What is a seed funding round?

A seed funding round is typically a startup's first significant round of institutional or external capital. It follows the pre-seed stage and precedes a Series A. Companies generally use seed capital to build or refine a product, hire a core team, establish go-to-market traction, and reach the milestones required to attract larger institutional investments.

Seed rounds in the U.S. typically range from $1 million to $5 million, with a median pre-money valuation around $14 million to $17 million, based on Carta data.

Can investors use IRA funds to invest in a seed round?

Yes. Through a self-directed IRA (SDIRA), investors can direct their retirement savings into private market investments, including startup seed rounds. This is permitted under IRS rules for self-directed IRAs, though there are important regulations to follow, such as prohibited transaction rules that prevent certain related-party dealings. Platforms like Alto handle the custodial and compliance requirements, making it straightforward for investors to participate in a private offering using Traditional, Roth or SEP IRA funds.

What is preferred stock, and when is it used in a seed round?

Preferred stock gives investors rights that common stockholders don't get, like liquidation preferences, anti-dilution protections, and, in some cases, board seats or information rights. 

Smaller seed rounds more often use SAFEs or convertible notes, which convert into preferred stock when a priced round eventually occurs. Carta's SAFE data showed that 86% of seed rounds under $500,000 were SAFEs, and the proportion of priced equity rounds increases as round size grows.

SAFEs are faster, require lower legal fees, and are simpler to execute. These advantages make them well-suited for smaller rounds or when you're raising from multiple individual investors. Priced rounds provide more certainty around valuation and ownership, create a cleaner cap table, and may be preferred (or required) by institutional investors. A common approach is to raise initial seed capital on SAFEs, then convert to a priced round when you bring on a lead institutional investor.

What mistakes do founders make when raising a seed round?

Some of the most common pitfalls include: 

• Overestimating valuation without the traction to support it
• Underestimating how long the raise will take (3-6 months is typical, not 3-6 weeks)
• Neglecting to model cumulative dilution across multiple SAFEs
• Failing to maintain regular investor updates during and after the raise
• Not raising enough runway (the median seed-to-Series A timeline is now over two years)
• Treating all capital sources as interchangeable rather than building a diversified funding strategy

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