For any fledgling startup, the journey from initial concept to a sustainable customer base is often the most grueling hurdle in the business lifecycle. While the excitement of a product launch can generate a flurry of early interest, the real challenge lies in the transition from transient curiosity to long-term retention. As founders navigate an increasingly crowded digital landscape, the question of how to acquire and keep customers remains the primary focus for venture capitalists and entrepreneurs alike.

At last week’s TechCrunch Disrupt, a panel of industry veterans—including Elia Wallen, founder and CEO of travel startup Engine; Grant Lee, founder and CEO of Gamma; and Crystal Huang, general partner at Google Ventures—tackled this existential problem. Their discussion offered a sobering look at the reality of growth, suggesting that while the tools of modern marketing are powerful, their effectiveness is rarely as straightforward as they might appear on the surface.

The Myth of the Social Media Magic Bullet

In the current startup zeitgeist, the rise of AI-centric companies like Cluely and Instinct has created a blueprint that many founders are eager to emulate. These organizations have successfully built massive, engaged audiences not merely through the utility of their software, but through the deliberate cultivation of their founders’ colorful, highly visible online personas. Consequently, social media has become the default "magic bullet" for many early-stage ventures.

However, Grant Lee, whose AI-powered presentation software company Gamma has reached a multi-billion dollar valuation, cautions that social media is not a plug-and-play solution. To achieve the exponential scale that Gamma realized, the company had to move beyond organic social posts and implement a highly structured, strategic influencer program. Gamma’s "Gambassador" initiative, which deployed a network of micro-influencers to showcase the product, was ahead of its time, proving that influencer-based marketing could be a cornerstone of a B2B strategy long before it became standard practice.

Yet, Lee warns that simply handing a product to an influencer and expecting a surge in revenue is a recipe for failure. The strategy, he notes, requires a granular understanding of the target audience. "If you have a product that can serve many different segments or use cases, then you want to basically have creators that can target each one of those," Lee explained during the panel. "If you have folks that are in consulting versus people that do all their marketing and create all the decks for their CMO, there’s all these different segments you might want to go after."

Lee observed that many founders fall into the trap of treating influencer marketing as a "set it and forget it" task. This passive approach ignores the necessity of deep collaboration. According to Lee, founders are far better served by investing significant time with their creators. If an influencer cannot effectively articulate the specific value proposition of the product, the financial investment is effectively wasted. "If they’re not able to understand how to articulate the value of your product, it doesn’t matter how much money you spend, it’s just going to fall flat," he added.

The Enduring Power of "Old-School" Tactics

While the allure of viral marketing is undeniable, the panel emphasized that the effectiveness of social media is highly dependent on the nature of the business. For some, the most effective path to growth is not through an algorithm, but through direct, human interaction.

Elia Wallen, CEO of Engine—a company that manages lodging and travel bookings for midsize enterprises—provides a compelling counter-narrative to the digital-first approach. Engine bootstrapped its way to $150 million in bookings before ever taking on outside venture capital, and throughout that period, the company utilized virtually no social media strategy. For Wallen, the digital noise of the modern web often pales in comparison to the reliability of traditional sales tactics.

"We did events and we smiled and dialed," Wallen said, describing the company’s early days. "We still have a lot of people picking up the phone. A lot of people who didn’t grow up with that or don’t understand it think that it’s outdated or it doesn’t work, but it does."

Wallen acknowledges that the "smile and dial" method is grueling, and many modern companies lack the discipline or the knowledge to execute it effectively. However, he remains adamant that those who ignore cold calling are missing out on a massive, underserved offline client base. "It’s a hard thing. There are a lot of companies that just refuse to do it or don’t know how to do it well. But they’re missing out on a very big offline client base. The phone still works."

To illustrate the effectiveness of unconventional, in-person engagement, Wallen recounted a story from Engine’s scrappy startup days. To ensure their booth at industry events stood out from the competition, the company hired a professional magician named David. The performer would execute tricks to draw prospective clients into the booth, creating a moment of genuine human connection that served as an icebreaker. It was a tangible, memorable experience that, according to Wallen, proved just as effective—if not more so—than the latest social media campaign.

Turning Usage into Evangelism

Regardless of whether a company finds its initial customers through influencer networks or cold-calling, the challenge of retention remains paramount. Crystal Huang, a general partner at Google Ventures who has guided numerous startups through their growth phases, emphasized that the data generated by early users is the most critical asset for determining long-term success.

"Can you look into usage data and figure out if it’s recurring, if it’s increasing, if they are referring their friends?" Huang asked. She argued that the answers to these questions are hidden in plain sight within early usage and retention metrics. If a product is truly solving a problem, the data will reflect that through habitual use and organic growth.

Beyond the metrics, however, Huang highlighted the importance of identifying the "super fans" within the user base. These are the customers who don’t just use the product, but who become emotionally invested in its success—often to the point of wanting to work for the company, promoting it to their peers, and acting as informal ambassadors.

"You need to have ways to create evangelists who are really passionate about the product," Huang noted. She suggested that the most successful companies are those that foster these relationships early, turning a transactional business relationship into a community-driven movement. Whether a founder is using an influencer network to reach those users or shaking hands on a trade show floor, the ultimate goal remains the same: proving enough value to transform a first-time customer into a permanent advocate for the brand.

As the panel concluded, the consensus was clear: while the tools for customer acquisition continue to evolve, the fundamentals of business—strategic targeting, persistence in communication, and the cultivation of genuine customer loyalty—remain constant. In an era obsessed with the speed of digital growth, the most sustainable startups are often those that understand when to leverage the reach of the internet and when to simply pick up the phone.

By Sagoh