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The First 90 Days: How AI Startups Can Turn Early Traction Into Sustainable Growth

AI is accelerating startup growth, allowing companies to generate meaningful recurring revenue in record time. But rapid traction does not always translate into sustainable success. To scale effectively, founders must prove that customer demand is repeatable.

At this year’s TechCrunch Disrupt, Lovable go-to-market lead Luke Arno, Polsia founder Ben Broca and Theory Ventures investor Tomasz Tunguz discussed how startups can navigate the critical first 90 days after launch.

Fast Revenue Does Not Guarantee Sustainable Growth

As AI makes software easier to build and replicate, identifying product-market fit has become more challenging. Arno argued that early-stage companies should focus on understanding where their customers are and how to reach them consistently before investing heavily in sales and marketing.

“The most critical thing for founders or earlier-stage companies to do is develop learning density or pattern recognition for where your customers are,” Arno said. “Don’t rush to build out a top-down go-to-market motion if you’re not there yet.”

Early revenue may demonstrate interest, but it does not necessarily prove that a business has found a reliable path to growth.

Repeatability Is The Real Test Of Product-Market Fit

Before expanding sales teams or increasing investment, startups need to show that they can attract customers through a consistent process that delivers similar results.

“If I bring on 10 new customers in 10 different ways to solve 10 different problems, sure, I brought revenue in, but I don’t have a way to go scale a go-to-market,” Arno said. “If I bring three customers in with a similar motion to solve a similar problem, now I have high confidence that I can go scale.”

AI app-building startup Lovable illustrates the potential scale of the opportunity. The company is valued at more than $13 billion, reports annualised revenue exceeding $600 million and has raised more than $700 million.

However, rapid growth remains difficult to replicate. Founders must understand not only how to attract customers, but also why they continue using a product once the initial excitement fades.

Speed Must Be Matched By Discipline

Tunguz said expectations around execution speed have risen sharply.

“The expectations for overall execution speed are absolutely tremendous,” he said.

The availability of capital has also changed the startup landscape. Since Tunguz began investing in 2008, funding rounds have expanded in scale, with seed-stage financing now ranging from modest early investments to raises of $500 million.

Greater access to capital brings higher expectations for speed, ambition and early traction. But scaling before establishing a clear customer acquisition model can create costly problems.

Staying Close To Customers Remains Essential

Broca argued that founders should maintain direct relationships with their markets rather than relying solely on growth metrics. Community building, email, events and direct outreach can help businesses understand customer needs and refine their products.

“The general rule is always to be talking to customers,” he said.

As AI reduces the time required to build and launch products, customer understanding becomes an even more important competitive advantage. Startups that combine speed with disciplined execution and a repeatable approach to customer acquisition are better positioned to turn early momentum into lasting growth.

Europe’s Deadly Summer Heat Exposed The Cost Of A Warming Continent

Europe experienced its deadliest summer for heat-related deaths on record in 2026, with an estimated 24,400 excess deaths linked to extreme temperatures across 30 countries. Researchers estimate that human-induced climate change was responsible for around 32,000 of the deaths attributed to heat in the study’s broader analysis, accounting for 65% of the total.

The findings highlight the growing public-health consequences of global warming, largely driven by fossil fuel use, as extreme heat becomes more frequent and severe.

A Summer Of Dangerous Heat

Between June and August, heatwaves pushed temperatures in Western Europe to an average of 2.9°C above the 1991–2020 norm, with some days reaching 12°C above average. Nearly a third of estimated heat-related deaths occurred during a particularly intense heatwave between 17 June and 1 July.

“These numbers are a stark reminder that our hotter, more extreme summers are having an increasingly severe impact on public health,” said Dr Clair Barnes, a researcher at Imperial College London and co-author of the study.

The estimated toll exceeded previous peaks of around 29,000 deaths in summer 2022 and 28,000 in 2003 across the region studied.

How Researchers Estimated The Toll

Researchers modelled the relationship between temperature and mortality across 854 urban areas in the EU, UK, Norway and Switzerland, covering around 40% of the population in the 30 countries studied.

The analysis incorporated temperature records, age, socioeconomic conditions, environmental factors and access to healthcare. By comparing actual temperatures with those expected without human-induced warming, the team estimated the additional deaths attributable to climate change.

Final official mortality figures for summer 2026 are not yet available in many countries, and heat-related deaths are often underreported because their effects can be difficult to identify directly.

Older People Face The Greatest Risk

People aged 85 and over accounted for roughly half of the estimated deaths. However, the impact extended across age groups, with around 800 excess deaths among adults aged 20–44 and approximately 6,000 among people under 65.

Southern Europe experienced the highest mortality burden, reflecting hotter temperatures and other vulnerabilities, including air pollution, limited green space and unequal access to healthcare and heat-alert systems.

Italy, France And Spain Record Highest Toll

Italy recorded an estimated 13,303 heat-related excess deaths, followed by France with 7,268 and Spain with 6,824. Germany recorded around 6,340, while the UK saw an estimated 4,354 deaths.

In the UK, the heat also placed significant pressure on healthcare services. Andrew Hartle, Professor of Practice of Anaesthesia at Imperial College Healthcare, said demand during the summer resembled that of a severe winter virus season.

Cities Urged To Strengthen Heat Protection

Researchers say cities can reduce the risks through climate shelters, external shading and building retrofits, alongside measures to help residents avoid exposure during the hottest hours. Checking on vulnerable people, staying hydrated and following heat alerts are also important.

The researchers stress that adaptation must go hand in hand with reducing fossil fuel use to limit further warming. The findings underline that extreme heat is already a major public-health threat across Europe, with thousands of lives at risk each summer.

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