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Home/The SaaS Podcast/Episode 400
Yembo: From Cold Calls & Rejections to Scaling an AI Startup
First Customers·Zach Rattner, Yembo

Yembo: From Cold Calls & Rejections to Scaling an AI Startup

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Zach Rattner is the co-founder and CTO of Yembo, an AI-powered platform that enables virtual home surveys for the moving and insurance industries.

In 2015, while working as a software engineer, Zach noticed that computers were becoming better than humans at identifying objects in images.

His wife's experience working at a moving company inspired him to apply this technology to the industry, which struggled with giving accurate quotes and handling logistics due to the complexities involved in each move.

However, building an AI-powered product was no easy feat.

As introverted engineers, Zach and his co-founder Sid had to force themselves to step out of their comfort zone. They made cold calls, visited moving companies in person, and often faced rejection.

In the early days, the founders also handled sales themselves. They attended industry trade shows and conferences to generate leads and build relationships with potential customers.

Despite their efforts, the first version of Yembo's product had limitations in its AI capabilities and user interface, which led to some customer churn.

The founders realized they needed to focus on finding early adopters willing to work through initial challenges and continuously iterate based on customer feedback.

Through their determination and hard work, Yembo gradually gained traction.

Today, the company serves customers in about 30 countries, processing hundreds of hours of video daily and generating high seven-figures in annual revenue with a team of 70 people.

This episode is part of our First Customers series.

Watch the Episode

Book Recommendations

Zero to One: Notes on Startups, or How to Build the Future

by Peter Thiel

Grow Up Fast: Lessons from an AI Startup

by Zach Rattner

Links

  • Yembo: Website | LinkedIn | X
  • Zach Rattner: LinkedIn | X
  • Omer Khan: LinkedIn | X

More on First Customers

How to Find Your First Customers by Living in Their Basement - Nate Baker

Nate Baker, Qualia

How to Find Your First Customers by Living in Their Basement

Nate Baker is the co-founder and CEO of Qualia, a software platform for title companies that helps coordinate the complex process of buying a home. Today, Qualia generates over $100 million in ARR with a team of 600 and has raised more than $200 million. In 2015, Nate was 21 years old and decided to build software for the real estate industry. He had no experience in that space. He didn't talk to any customers. He just did some research and decided that was the thing he was going to do. Then he started building. Still without talking to anyone. Nate admits this was a mistake. He and his co-founders got key things wrong about how the business would work. They wasted months building things they eventually threw away. It wasn't until they found their first customer that they started making real progress. Their first customer was Barry Feingold, a state senator in Massachusetts who also ran a real estate law firm. Barry believed in the vision, taught them the industry, made introductions, and helped them understand what actually mattered. The relationship was unconventional: Nate and the first 25 employees rotated through living in Barry's basement. New hires would get a call Sunday night: "Your onboarding is in Andover. You're going to live in Barry's basement for two weeks. He's going to teach you title. You have to tutor his kids in math." But then Barry's existing software vendor found out he was working with Qualia and shut off his access overnight. Nate and his team didn't even have the core features built yet. They had to figure it out fast. It became the most productive month in company history. Barry didn't just become a customer—he introduced Qualia to his competitors. Those network-based relationships became the foundation for the first 10 customers. Nate learned that your first customers must come from your network, not cold outreach. In this episode, you'll learn: How to find your first customers through network-based selling instead of cold outreach The multi-year upfront contract strategy that brings cash forward and locks in commitment Why geographic focus beats national expansion in the early days How to embed yourself with customers to truly understand the problem When to hire your first sales leader and how fast to scale

Agency to AI SaaS: Scaling from $1M to $18M ARR in 9 Months - Richard Hollingsworth

Richard Hollingsworth, Fyxer

Agency to AI SaaS: Scaling from $1M to $18M ARR in 9 Months

Richard Hollingsworth is the Co-founder and CEO of Fyxer, an AI-powered email assistant that predicts and drafts emails for busy professionals. Richard and his brother Archie grew up on a farm, but they knew the slow pace of agricultural life wasn't for them. They saw tech as the opposite environment—fast feedback loops, results within your control. They started by building the UK's largest executive assistant agency, bootstrapping it to $5M in revenue. But from day one, they had a bigger vision: turning the service into software. For years, they tried to build "tech-enabled" solutions, but nothing worked to pull the price down enough for the mass market. Then GPT-3 launched. It was the breakthrough they'd been waiting for. Unlike other AI SaaS startups starting from scratch, Fyxer had a secret weapon: six years of detailed logs from human assistants. They knew exactly how an EA organizes an inbox because they had thousands of hours of data on it. They used this proprietary data to train their AI models, ensuring their product was more accurate than a generic LLM wrapper. The growth was explosive. They started the year with $1M ARR and a team of four. Within 9 months, they hit $18M ARR. They moved to San Francisco, joined an AI residency, and shifted their focus from "Tech Bros" to "Professional Services"—real estate brokers, consultants, recruiters—people who actually drown in email. One of their biggest wins came from a single signup via a Facebook ad. That user turned out to be the CEO of a massive real estate brokerage. Within 7 days, Richard's brother Archie flew to Seattle, met the CEO at his lake house, and closed a $1.2M deal to roll Fyxer out to 5,000 employees.

First Customers From a Notion Page and Python Scripts - Stefan Bader

Stefan Bader, Cello

First Customers From a Notion Page and Python Scripts

Stefan Bader is the co-founder and CEO of Cello, an all-in-one referral platform that helps SaaS companies reward their users for bringing in new customers. Back when Stefan was Chief Revenue Officer at a payment processing company, he noticed something odd. His users were bringing in tons of new customers, but there was no way to reward them. Every tool out there was for affiliates and influencers. Stefan saw the opportunity. And in 2022, he quit his job and started Cello. But building it turned out to be way harder than he'd imagined. Paying individual users meant navigating compliance laws in dozens of countries, international banking regulations, and tax requirements that no one had mapped out before. And his MVP was embarrassingly basic. Customers got their analytics through shared Notion pages. No login portal. No dashboard. Just Stefan's team running Python scripts and configuring everything manually behind the scenes. "This is not a product," one early customer told him. But Stefan stayed focused on what mattered - could it actually generate referrals? The answer was yes. He also made pricing dead simple - pay nothing until you make money from referrals. However, most SaaS companies didn't even know they needed this product. Stefan had to educate every prospect about why user referrals were different from affiliate programs, and why they were leaving money on the table. As early customers started seeing results, word spread. But the real breakthrough came from something tiny - a "powered by Cello" link in their widget. As customers grew, millions of their users saw it. That little link became their biggest growth driver. Today, Cello generates $2.5M in ARR, powers referral programs for companies like Miro and Typeform, and reaches over 7 million users each month.

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