Sushi, Surprises, and a “Reverse Takeover”: The Story Behind Zendesk’s Acquisition of Ultimate

Picture this: a Berlin-Helsinki startup is riding a rocket of AI-fueled growth, Zendesk is on the hunt for the next big thing in customer experience, and somewhere in San Francisco, a sushi dinner is about to change the future for both teams.

Welcome to our online panel covering the inside story of Zendesk acquiring Ultimate (now Zendesk AI Agents). Watch or read how Zendesk CTO Adrian McDermott and Ultimate Co-founder Sarah Al-Hussaini share the inside stories of a deal that had as much excitement, emotion, and unexpected twists as your favorite binge-worthy series.

Here’s a summary of the session:

When AI Got Hot (and So Did the Phones)

The story kicks off in summer 2023, just as ChatGPT fever was sweeping the tech world. Suddenly, everyone wanted in on AI, and Ultimate, a young automation platform for customer support, found itself in the middle of a gold rush. Inbound leads skyrocketed, the team was hustling to keep up, and “hockey stick growth” was no longer just a dream, it was the new normal.

Meanwhile, Zendesk’s Corporate Development team was deep in research mode, chatting with over 30 companies in the AI space. But as the conversations got serious, one thing became clear: Ultimate was the perfect fit. Not only did 70% of Ultimate’s customers already use Zendesk, but the cultures meshed, the tech stacked up, and both sides saw the future of customer service the same way.

For Ultimate, the timing was fortuitous. The company had just experienced record-breaking growth, shifting from a balanced inbound/outbound sales model to a business dominated by inbound demand. While Ultimate had been preparing for a Series B funding round, the prospect of Zendesk acquiring a competitor made the acquisition both a strategic opportunity and a potential existential threat.

The Acquisition Process

The process unfolded over several phases:

Initial Outreach and Evaluation: Zendesk initiated discussions in early summer, weighing whether to build new AI capabilities internally or acquire them. By September, the decision to acquire had been made, and Ultimate was shortlisted as the top choice.

Due Diligence and Closing: After a period of deep technical and commercial evaluation, a letter of intent was signed in December, with the deal officially closing three months later. The cross-border nature of the transaction added complexity, making the timeline slightly longer than Zendesk’s typical acquisitions in North America.

Why Ultimate Was the Right Fit

Zendesk’s decision was driven by several factors:

Speed of Innovation: Ultimate demonstrated rapid product development and deployment, a critical asset in the fast-moving AI sector.

Go-to-Market Strength: The company had a mature sales-to-adoption process, low customer churn, and a strong overlap with Zendesk’s existing customer base.

Cultural and Technical Alignment: Both companies shared a similar approach to customer experience and innovation, making integration smoother.

The Dance (and the Sushi)

Acquisitions aren’t just about spreadsheets and contracts—they’re about chemistry. As the process moved from casual chats to serious negotiations, both sides started feeling the pressure (and excitement). There was the classic “are-we-really-doing-this?” moment, the thrill of being the top pick, and, of course, the all-important sushi dinner in San Francisco. Deals are sealed over spreadsheets, but relationships are built over soy sauce and wasabi.

There were also some “sad panda” moments for the other finalists, being told you’re not the chosen one is never fun. But for Ultimate, the stakes were clear: if Zendesk was going to buy someone, it had to be them.

The Big Reveal: Integration, But Make It Fun

So what happens after the confetti falls? In this case, something pretty rare. Instead of being swallowed up, Ultimate stayed intact when it came to team, product, and vision. In fact, it was almost a “reverse takeover.” Zendesk didn’t just acquire Ultimate; they handed over the keys to their own knowledge team and let Ultimate lead the charge on AI agents. The startup’s energy and speed became the new standard, and suddenly, the “little” company was showing the giant how to move fast and break (the right) things. For the Ultimate crew, life changed in some ways, like bigger resources, global reach, and a lot more collaboration with Zendesk’s sales and support teams. But the core mission stayed the same: build the best AI agents for customer support, keep innovating, and have fun doing it.

Final Thoughts (and a Few Laughs)

Be honest and open: In M&A, transparency is everything. Surprises are great at birthday parties, not in due diligence.

Culture fit matters: Shared values and ways of working are just as important as the tech.

Celebrate the wins: Whether it’s a sushi dinner or a new global launch, take time to enjoy the ride.

And perhaps the biggest lesson? Sometimes, the best way to take over the world is to let the “acquired” company lead the way. In the end, Zendesk and Ultimate didn’t just merge products—they merged visions, teams, and a whole lot of excitement for what’s next.

So next time you reach out to customer support and get lightning-fast help from an AI agent, just remember: somewhere, there’s a team including celebrating with sushi, still pushing the boundaries of what’s possible.

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