When you think of tech pioneers who’ve changed how we communicate online, Biz Stone is one of the names that immediately stands out. Best known as a co-founder of Twitter, Stone has long been a behind-the-scenes force in Silicon Valley, quietly influencing the way we consume information and interact with each other online. As of 2025, people are as curious about Stone’s professional legacy as they are about his financial success—and it’s easy to see why.
How Much is Biz Stone Worth in 2025?
In 2025, Biz Stone has an estimated net worth of $250 million. This impressive figure is a reflection of his decades-long journey in the tech industry—not just as a co-founder of Twitter, but as a serial entrepreneur and investor. Stone’s wealth has been shaped by his key roles in some of the most important digital platforms of the 21st century, as well as his knack for identifying and backing promising startups.
From Blogger to Billion-Dollar Platforms
Stone’s story is an inspiring one. Born on March 10, 1974, he is now 51 years old and has remained active in tech circles even after stepping back from Twitter’s day-to-day operations. Before Twitter became a household name, Stone worked at Google and was one of the early minds behind Blogger, one of the first major blogging platforms. His understanding of digital communication trends proved invaluable when he, along with Jack Dorsey, Noah Glass, and Evan Williams, co-founded Twitter in 2006.
Twitter revolutionized social media by introducing short-form, real-time communication. The platform became an indispensable tool for everyone from celebrities and politicians to everyday users wanting to share thoughts and news instantly. Stone’s contribution to shaping the platform’s simplicity and functionality was critical to its early success.
The Mastodon Connection & Current Ventures
While many know him primarily from his Twitter days, Biz Stone has never stopped innovating. In a move that’s had many in the tech world talking, Stone recently joined the board of directors for Mastodon’s new U.S. nonprofit. Mastodon, a decentralized and open-source social network, has been gaining significant traction as users seek alternatives to Elon Musk’s rebranded Twitter, now known as X.
Stone’s involvement with Mastodon is emblematic of his ongoing belief in open and user-centric digital platforms. His voice on the board signals his continued interest in shaping how people communicate online, especially at a time when decentralized networks are becoming more important.
Where Does Biz Stone’s Wealth Come From?
Biz Stone’s $250 million fortune doesn’t stem from just one source. It’s the product of years of diversified ventures, investments, and leadership roles:
1. Twitter
Stone’s role as a Twitter co-founder is by far his most recognized achievement. Even after selling a significant portion of his stake, his early involvement has left him with lasting financial rewards as the platform grew into a global phenomenon.
2. Medium & Jelly
After Twitter, Stone didn’t slow down. He co-founded Medium, the popular platform that allows writers and thought leaders to publish long-form content with ease. He also launched Jelly, a Q&A search engine that was eventually acquired by Pinterest, adding another win to his entrepreneurial portfolio.
3. Obvious Corporation & Obvious Ventures
Stone is also the co-founder of The Obvious Corporation, an innovation lab designed to create digital tools with a social good focus. Through Obvious Ventures, he has invested in and advised multiple startups, many of which align with his passion for making the world a better place through technology. These investments and advisory roles have steadily contributed to his wealth.
Family Life & Philanthropy
Away from boardrooms and product launches, Biz Stone keeps his personal life relatively low-key. He is married to Livia Stone, a talented artist and designer. The couple shares a son, and Stone often mentions how his family grounds him amid the fast-paced world of tech entrepreneurship.
Stone is also an advocate for social good and philanthropy. He has donated to several charitable causes over the years, often focusing on education, environmental sustainability, and initiatives aimed at improving digital literacy.
Final Thoughts
Biz Stone’s $250 million net worth in 2025 reflects more than just financial success—it’s a testament to a career defined by creativity, thoughtful innovation, and a commitment to improving digital communication. Whether you’re a startup founder, a tech enthusiast, or just someone scrolling through your favorite platform, you’ve likely been impacted in some way by Stone’s work.
And if his recent projects are any indication, Biz Stone’s best contributions might still be ahead of him.
