Behind the Billion-Dollar Routine: How Mark Cuban Rules His Empire, One Email at a Time
- Sienna Grace
- Jul 24
- 3 min read
Updated: Jul 25
Exclusive peek into his 3-phone lifestyle—no VA, no drama, just pure power.
July 25, 2025
They call him the Inbox Emperor. Not because it sounds good in a headline—but because it’s true.
In 2025, Mark Cuban—self-made billionaire, founder of Cost Plus Drugs, and former Shark Tank icon—still personally handles 700 to 1,000 emails a day across three smartphones (yes, three: two Androids, one iPhone). No assistant. No VA. No secretary sneaking in drafts.
“I’d rather deal with my inbox than sit in meetings,” Cuban once said. And he meant it.
Whether he’s poolside at his Miami home, floating on a yacht off Capri, or in between workouts, Cuban answers emails himself. He sees it as his real-time deal flow—a mix of opportunity, intuition, and absolute control.
Inbox as Empire
While most CEOs pay people to manage their digital lives, Cuban curates his own. His personal goal? Keep unread emails under 20. He often hits zero.
He’s known to reply within minutes. Colleagues say Cuban has sent investment approvals, negotiation notes, and even support tickets from the locker room.
“My inbox is where business happens,” he told Entrepreneur. “Everything else can wait.”
To stay efficient, he builds his own tech stack:
Smart filters
AI-powered auto-replies
Ruthless prioritization
But make no mistake: Cuban isn’t trying to be efficient just to be productive. He’s trying to be present—in every decision, every customer touchpoint, every moment that matters.
The Startup That Changed His Life
Cuban shocked the startup world in 2023 when he left Shark Tank after 16 seasons. The reason? He wanted to focus full-time on Cost Plus Drugs—his direct-to-consumer pharmaceutical company aiming to slash U.S. drug prices.
By 2025, Cost Plus Drugs lists over 2,000 medications, powered by AI-driven inventory systems and no middlemen. It’s not just a business. It’s a mission.
“I want to make healthcare affordable. It’s that simple,” Cuban told Yahoo Finance.
And yes—he reads customer service emails personally. People don’t believe it until they get a reply with his signature. Sometimes within 24 hours.
Cuban vs. AI (Or... With AI?)
You might expect a tech billionaire to delegate everything. Not Cuban.
In fact, he’s all-in on AI literacy. He believes AI will soon be as essential as Excel. He reads AI whitepapers before bed and invests in small teams building open-source models.
“The next trillion-dollar startup will come from someone in a garage using ChatGPT and free compute credits,” he said in an AOL News interview.
His AI investments in 2025 are focused on three things:
Healthcare automation
Education access
Email productivity (surprise!)
Credit: @mcuban (Official Instagram)
Politics? No Thanks.
A whisper in Washington once said Kamala Harris offered Cuban a chance to join the presidential ticket. Cuban politely declined.
“I’d rather run my inbox than a campaign,” he joked.
Truth is, Cuban doesn’t want power. He wants clarity. “Focus is freedom,” he’s said. And he lives it. No clutter, no Slack, no wasted time.
Final Glimpse: The Hustle Never Left
So who is Mark Cuban in 2025?
He’s not just rich. He’s hands-on rich. The kind of rich that answers support emails. That funds AI startups from a treadmill. That refuses to let someone else think for him.
He’s the Inbox Emperor, yes. But he’s also a symbol: proof that in a world full of noise, the quiet doers still win.
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