A lesson for founders approaching Series B and beyond

The illusion of a strong network

You’ve closed a Seed. You’ve closed a Series A. You know dozens of VCs. You get replies when you email. You have warm relationships with investors who believe in you.

Then you start thinking about your Series B – and something quietly doesn’t add up.

The funds you know well aren’t growth funds. The partners who championed you before don’t write $20M+ checks. The relationships you’ve built over years are real and valuable – but they belong to a different universe than the one you’re about to enter.

This is one of the most disorienting moments in a founder’s fundraising journey. It doesn’t feel like starting over. But in terms of network, it largely is.

Early-stage VCs and growth VCs are different ecosystems

This distinction is underappreciated until founders run directly into it.

Early-stage investors – pre-seed through Series A – are evaluating potential. They know how to sit with uncertainty. Their network tends to be founder-dense: accelerators, angel communities, operator circles, emerging fund managers.

Growth-stage investors operate differently. They think in systems, cohorts, and capital efficiency. Their peer group is other growth funds, large institutional LPs, and the operators running scaled companies. Many of them have never written a check under $10M. Some have never met a founder before their Series B.

The communities overlap less than founders assume. The funds are different. The partners are different. The events are different. The signal sources are different.

What got you here – a warm, well-cultivated early-stage investor network – will not automatically get you there.

The Series A is when the clock starts

Most founders begin thinking about growth-stage relationships when they need growth-stage capital. By then, it’s already late.

The right moment to start building your growth-stage network is during your Series A – ideally in the months after closing it, when you have momentum but no immediate fundraising pressure.

This matters for the same reason early relationship-building always matters: investors who have watched you execute over 18 months see something fundamentally different than investors meeting you for the first time in a data room. You are no longer a pitch. You are a track record in progress.

The growth-stage version of the coffee meeting – the pre-fundraising conversation described elsewhere in this course – applies here just as much. But you have to be deliberate about it, because these investors won’t find you the way early-stage VCs might. Growth funds are not crawling accelerator demo days. They are not following first-time founder Twitter accounts. They are paying attention to companies that are already making noise – and to founders that people in their network are already talking about.

Your existing network has less reach here than you think

When you were raising your Seed or Series A, your investors were probably some of the best connectors in the room. They knew the next tier of early-stage funds. Their intros carried real weight.

For a Series B, that dynamic can reverse.

An early-stage fund may have relationships with growth funds in theory – but not with the actual partners who run deal flow and make decisions at those firms. A warm email from a pre-seed investor to a Sequoia Growth partner is not the same as a warm email from a founder who recently closed a strong Series B and is in that partner’s deal review every quarter.

This is worth stress-testing early. Ask your current investors directly: who do you have genuine relationships with at the growth-stage funds on my target list? And use the same connection-quality framework you’d apply to any other intro source – someone who met a partner at a conference and someone who co-invested alongside them in two deals are not equivalent.

In many cases, you’ll find the honest answer is: the connection is weaker than you’d hoped. That’s useful information. It tells you how much work you need to do – and how early you need to start doing it.

Who becomes your best connector at growth stage

The intro hierarchy shifts at growth stage. The same principles apply – warm beats cold, quality beats volume – but the people who carry the most weight change.

Founders who recently raised growth rounds from your target funds become your most valuable connectors. A founder who closed a Series B with a specific fund 12 months ago, and whose company is performing well, is a direct signal to that partnership. If they vouch for you, partners listen. Actively seek these relationships out. Be genuinely useful to them first.

Operating executives at scaled companies carry more weight at growth stage than they did earlier. CFOs, CROs, and Chief of Staff profiles at companies the funds have backed – these people are known quantities to growth partners. A credible operational reference from inside a portfolio company lands differently than a founder intro.

Growth-stage co-investors and crossover funds are worth mapping carefully. If a fund has co-invested in growth rounds alongside your target, an introduction through that relationship has institutional credibility. Understanding which funds regularly co-invest together is a research task worth doing.

Your early-stage investors remain valuable – but be honest about the depth of their connections into growth networks specifically. In some cases, they will have strong links. In others, you will need to route around them without making it awkward.

What to do starting now

Map the white space. Pull your target growth-stage fund list. For each fund, identify the specific partners who run the relevant sector or stage. Then honestly assess: who in your current network has a real relationship with that person? Not a passing acquaintance – a relationship with actual signal.

Find the portfolio founders first. For every fund on your list, identify two or three founders of portfolio companies that have performed well. These are the connectors worth building real relationships with – not transactionally, but genuinely. Follow their work. Find reasons to be useful. This takes time, which is why it starts at Series A.

Show up in different rooms. Growth-stage investors congregate in different places than early-stage investors. Scaling-focused conferences, later-stage founder communities, operating-heavy events – these are the environments where you become a known quantity to people who weren’t previously paying attention to you.

Update your long list accordingly. Add growth-stage funds to your investor tracking document and apply the same connection-mapping exercise with your existing investors. Where are the gaps? Who has genuine relationships with which partners? Which funds are currently unmapped – meaning you have no real path in yet? Those gaps tell you where to invest relationship time over the next 12 to 18 months.

The mental shift

Early-stage fundraising often rewards founders for being interesting.

Growth-stage fundraising rewards founders for being inevitable.

The investors writing growth checks are not asking whether this could work. They are asking whether this is already working – and whether the person running it can take it significantly further.

Your network reflects that shift. At growth stage, you are not being introduced as a promising builder. You are being introduced as someone who has already done something real, who the best operators and investors in the ecosystem are paying attention to, and who is now ready for the next stage of capital.

That perception is built over time, not assembled in a data room. The founders who walk into their Series B with ten warm relationships at growth-stage funds, because they spent the 18 months after their Series A quietly building them, are playing a different game than the ones who start mapping the landscape after they decide to raise.

Start building that network before you need it.

The best time was the day you closed your Series A.

The second-best time is now.