Part of this reflects how much the market has changed since the post-pandemic boom. Consumers are spending differently, businesses are taking longer to buy, and many sectors that saw rapid growth in 2020–2021 have slowed down significantly. For Seed-stage companies built around those earlier growth expectations, progressing to the next stage has become much harder.
Breaking it down by industry
The sector breakdown is revealing too. Fintech and SaaS (the categories that attracted enormous seed capital in the post Covid-19 boom) show a disproportionate, but predictable, representation among stalled companies. When we look at our data we can see that 61% of companies that raised in 2019-2022 and remain at Seed-stage were in the tech industry. SaaS companies make up 17.8% of that, and fintech companies equate to 6.4%.
Those industries were hit hardest by the market reset. Many companies raised money at a time when investors were prioritising growth above all else. But expectations have changed quickly. Investors now want clearer routes to profitability, stronger financial discipline, and evidence that businesses can grow sustainably (not just quickly). For a lot of startups built around the conditions of 2021, that has been a difficult adjustment to make.
Breaking it down by location
Geography plays a critical role in where stalled startups accumulate. Rather than being a dispersed UK-wide issue, “zombie” or stalled companies are heavily concentrated in London, making up 49%. The capital’s dominance in venture funding means it also hosts the largest pool of post-2021 companies that raised once, scaled quickly on paper, and then plateaued.
Outside London, the number of stalled startups is much lower, largely because fewer startups raised significant funding during the boom years. London simply saw more companies grow fast, raise at high valuations, and chase aggressive expansion plans.
When the market cooled, many of those businesses struggled to keep momentum. The result is a much bigger backlog of companies in London that raised capital successfully once, but have not been able to reach the next stage of growth.
The impact of zombie companies
The conventional wisdom on zombie startups treats them as a cleanup problem, in other words, a hangover from the 2021 boom that will eventually resolve itself through attrition.
That isn’t the full picture, though. Zombie startups don’t just fail, they end up distorting the ecosystem around them. They occupy cap table positions that prevent investors from recycling capital. They retain talent that can’t fully commit to growth — or leave, draining institutional knowledge. They hold onto IP and market positions that could, in other hands, generate real value. And critically, they consume the attention of founders who are spending the majority of their time fundraising rather than building.
Consider what the data shows about bridge rounds. In Q2 2025, 16.6% of all venture capital raised on Carta came through bridge rounds, up from 11.8% the year before.
Bridge rounds are meant to keep companies alive long enough to reach the next milestone. But at this scale, they suggest something broader: investors are spending more time preserving existing bets than making new high-conviction ones. This is less a sign of confidence than a market delaying difficult decisions.
And there’s another dimension to this that rarely gets discussed: what zombie startups reveal about the underlying health of the VC funds that backed them. Analysis from Coriche Growth Advisors suggests that up to half of the startup funds that existed at the peak of the 2021 bubble have effectively become zombie investors themselves — managing legacy portfolios, collecting management fees, unable to make new bets. When the fund is a zombie, the portfolio company often becomes one too. There’s no one with fresh capital and active conviction pushing for a resolution.
The impact of zombie companies
At some point — and 2025 and 2026 are shaping up to be that point — a wave of zombie startups will reach the end of their runway simultaneously. The bridge rounds will run dry, and the market will face a reckoning that has been building for three years.
Despite concerns about “zombie” companies, startup insolvency rates actually fell in 2025 — the first decline after four consecutive years of increases. PwC found that venture-backed startup insolvencies dropped in 2025 after rising every year between 2021 and 2024, suggesting investors and founders are increasingly prioritising survival and capital discipline over aggressive growth.
That sounds counterintuitive, but it makes sense: the companies that were going to fail have been failing, slowly, for years. What remains in the zombie cohort are the ones with just enough cash, just enough customers, and just enough hope to keep going.
The harder question is: of those companies, how many have a genuine path forward? When we look at the Seed-stage companies that raised in 2019-2022, we can see that 32% are now either in Dead or Zombie-stage (by this definition), or have exited (4% of those through an acquisition). That’s just 2% less than those that have progressed.
This isn’t a sudden collapse, it’s happening slowly. Much of the weakest cohort has already filtered out slowly, but what remains is a group of companies kept alive by extensions, not momentum.
As bridge funding runs out and follow-on capital stays selective, these outcomes will stop being spread over time and start landing all at once. With roughly a third of post-2019–2022 seed companies already dead, stalled, or exited, and a similar share still moving forward, the market is now split, and the next phase will simply decide which side the rest fall into.