The most popular seed fund format in venture capital may be the worst bet of this vintage

Small boutique seed funds under $100 million are the most popular vehicle in venture capital right now. Harry Stebbings, founder of 20VC, thinks that popularity is the tell. His call, stated plainly: this category will be the worst-performing group in venture in the current vintage.

The logic is worth sitting with at length, because it does not rest on a claim that seed investing is broken or that San Francisco has stopped producing great companies. The argument is structural and narrower than either of those. Stebbings describes the LP sentiment as almost comically uniform: every limited partner he speaks to wants the same thing, a San Francisco-specific seed fund, sub-$100 million, boutique. He flags the consistency itself as the signal. “Every LP,” he says, and then repeats it, as if the repetition is the point.

When capital allocation converges that completely on a single format, the format tends to disappoint. Crowded trades rarely survive their own popularity. The dynamics that make a strategy legible to a broad base of limited partners, the clean pitch, the familiar geography, the digestible fund size, tend to erode the very edge that made it attractive in the first place. Stebbings is arguing that the crowding has already happened at the LP level, before it fully registers at the portfolio level. By the time a vintage is mature enough to measure, the structural disadvantage will be visible in the numbers.

The mechanics of how that disadvantage compounds are worth spelling out. A sub-$100 million fund is working with limited reserves. When a portfolio company needs a bridge, or when a breakout company raises a priced round at a valuation that demands meaningful follow-on to maintain ownership, a small fund has less room to respond. Larger vehicles can protect their positions. Boutique funds must choose between dilution and writing checks that consume a disproportionate share of remaining capital. Neither option is clean. Over a vintage that includes the current rate environment and a delayed exit market, that constraint bites harder than it did in a lower-cost, faster-liquidity period.

Every LP wants San Francisco specific seed fund only under 100 million. And I think this would be the worst performing category of venture in this vintage. Harry Stebbings

The LP dynamic adds a second layer. When a strategy is universally favored, the population of managers raising into it expands. Not all of those managers are differentiated. Some are selling geography and stage as a thesis rather than demonstrating a proprietary source of deal access or a genuine pattern of winning competitive rounds. LPs allocating to the format rather than to the specific manager are buying the category at its most crowded point. That is a different bet than backing a contrarian operator with a genuine edge, and it tends to produce category-average returns rather than top-quartile ones.

Stebbings is not predicting a collapse. He is predicting underperformance relative to other venture categories in this vintage, which is a quieter but still falsifiable claim. It does not require any single fund to blow up. It requires that, in aggregate, the sub-$100 million San Francisco seed format produces returns that trail the broader venture distribution once the current vintage seasons. Given the number of funds raised into this format over the past several years and the shared structural constraints they carry, that outcome needs only median results across a crowded field.

What would have to be true for the call to be wrong? Several things, all at once. The current vintage of boutique seed funds would need to generate markups and distributions that outpace larger vehicles, most plausibly by catching companies early enough that entry prices more than compensate for limited follow-on capacity. The San Francisco concentration would need to remain a genuine source of proprietary deal access rather than a branding preference that LPs find comfortable. And the managers flooding into the format would need to be genuinely differentiated from one another, producing a spread of outcomes wide enough that the top performers lift the category average.

None of those outcomes is impossible. Some number of sub-$100 million seed funds will almost certainly produce exceptional returns in this vintage. The question Stebbings is raising is not whether any will, but whether the category as a whole will. That is the bet he is making, and it is a bet against a format at peak popularity, which is historically not where the best risk-adjusted returns are found. The vintage will take years to fully settle. The call is on the record and can be checked.