The No-Call Rule

If you're trying to reach Mark Cuban by phone, don't bother. The billionaire entrepreneur has a simple policy: he doesn't do calls. Period.

In a recent TikTok video posted by MasterClass and reported by Fortune, Cuban laid out his reasoning for the email-only approach. It's not about being difficult or inaccessible. He's actually convinced this makes him better at his job.

"No, I don't do calls," Cuban explained. "You know, I'll engage with you via email, and trust me, I do this all the time. I'm really good at it."

His logic is pretty straightforward. With email, he can craft more thoughtful, comprehensive responses instead of shooting from the hip on a call. And given his schedule, there's a practical advantage too: memory backup.

"If we do it via email, I can search for it, always," Cuban noted.

Decades of Searchable Conversations

This isn't some recent quirk. Cuban has maintained a searchable archive of his email inbox stretching back decades. For someone juggling multiple businesses and investments, having that digital paper trail beats trying to remember what was discussed in a meeting three months ago.

The former principal owner of the Dallas Mavericks has previously explained that he prefers this method over what he considers long, boring meetings. Why spend an hour in a conference room when you can handle the same business in a few well-crafted emails?

$100 Million Proof of Concept

Cuban's email strategy isn't just personal preference. It's become a legitimate business channel. In 2024, he invested $100 million through email pitches. His email address is publicly available, and he actually reads what lands in his inbox.

One notable example: a $350,000 investment in a company founded by a 20-year-old entrepreneur who simply sent Cuban an email. No connections, no warm introduction, just a cold pitch that happened to land.

There are downsides, of course. Emilie Vignon, associate director at Robert Walters California, pointed out that "younger generations are less inclined to spend hours in a restaurant or cafe when they can have a quick discussion online." Something gets lost when you eliminate face-to-face interaction entirely.

But Cuban's success speaks for itself. The Shark Tank star, with an estimated net worth of $6 billion, has turned email into both a time-management tool and an open door for entrepreneurs willing to craft a compelling pitch. His inbox has essentially become the most accessible investment portal in Silicon Valley.

For anyone hoping to reach Cuban with a business idea, the message is clear: skip the phone tree and hit send.