Biz Stone, an influential name in Silicon Valley, has long been a driving force behind some of the most recognizable names in the tech world. Best known as one of the co-founders of Twitter, Stone’s contributions to social media and digital innovation have left a lasting impact on how people communicate globally. As of 2025, interest in Biz Stone’s net worth and professional journey remains high, especially as he continues to expand his presence in the tech and investment sectors.
What is Biz Stone’s Net Worth in 2025?
As of 2025, Biz Stone’s net worth is estimated to be $250 million. This significant figure reflects his decades-long involvement in the technology industry, from his role in launching Twitter to his participation in numerous startups, advisory roles, and venture capital initiatives. While Stone stepped back from the day-to-day operations of Twitter years ago, his equity and early contributions to the company remain a crucial factor in his overall wealth.
Career Overview: The Making of a Tech Visionary
Stone began his professional journey as a designer at Google before moving on to co-create Twitter in 2006 alongside Jack Dorsey, Noah Glass, and Evan Williams. As one of the key minds behind Twitter’s original design and functionality, Stone was instrumental in transforming the microblogging concept into a global social media powerhouse.
Following his success with Twitter, Stone co-founded Medium, a platform aimed at promoting long-form writing and high-quality content, and Jelly, a Q&A search engine that was later acquired by Pinterest. His involvement in these ventures highlights his ability to anticipate trends and develop tools that shape how people interact with information online.
In addition to his entrepreneurial endeavors, Stone is a co-founder of The Obvious Corporation, an innovation lab focused on building systems that contribute to a positive world impact. Through Obvious, Stone has supported and developed a variety of startups with an emphasis on ethical business practices and meaningful digital experiences.
Recent Involvement: Mastodon and the Shift Toward Decentralized Social Media
In 2024, Biz Stone joined the board of directors for Mastodon’s newly formed U.S. nonprofit. Mastodon, an open-source, decentralized social network, has gained substantial traction in recent years as a community-driven alternative to Elon Musk’s X (formerly Twitter).
Stone’s involvement with Mastodon signals a full-circle moment for the tech entrepreneur, returning to the social media space but this time focusing on a decentralized and user-first platform. His decision to join Mastodon’s leadership reflects his long-standing advocacy for open communication and the democratization of online networks.
How Biz Stone Makes His Money
1. Business Ventures
Stone’s primary source of wealth remains his founding roles in several high-profile tech ventures. His early work with Twitter, which went public in 2013 and has since undergone major transformations, provided him with substantial equity and earnings.
Medium, another one of his key projects, has solidified itself as a respected publishing platform used by writers, thought leaders, and major brands. Even though Stone is no longer heavily involved in its day-to-day operations, his role in building and scaling Medium contributed to his net worth.
Jelly, while a smaller venture compared to Twitter and Medium, was acquired by Pinterest, adding to Stone’s financial successes.
2. Investments and Obvious Ventures
Biz Stone has strategically invested in numerous startups and companies through Obvious Ventures, a firm that focuses on sustainable and purpose-driven businesses. The venture capital arm has stakes in sectors such as fintech, healthcare, education technology, and clean energy. Stone’s investment philosophy aligns with his personal values, targeting businesses that promise both financial returns and positive social impact.
His portfolio includes early investments in companies that have experienced successful exits or substantial growth, further padding his net worth.
3. Advisory Roles and Public Speaking
Stone is also a sought-after speaker and advisor. His insights into the future of social media, entrepreneurship, and responsible innovation have made him a regular figure at industry events and conferences. While these activities may not contribute the majority of his earnings, they further cement his reputation as a respected leader in the tech space.
Personal Life: Age and Family
Born on March 10, 1974, Biz Stone is currently 51 years old. He resides in California with his wife, Livia Stone, with whom he shares a son. Stone has been open about the importance of balancing his professional ambitions with family life, often emphasizing the value of stepping back to focus on personal well-being and relationships.
Stone and his wife are also involved in various philanthropic activities, supporting education and environmental causes through charitable donations and active participation in nonprofit initiatives.
Conclusion
Biz Stone’s estimated $250 million net worth in 2025 is the culmination of years spent at the intersection of technology and innovation. From co-founding Twitter to backing a new generation of startups through Obvious Ventures, Stone’s career trajectory showcases his ability to adapt and lead in a rapidly changing digital landscape.
His renewed focus on decentralized platforms like Mastodon and commitment to ethical business models reflect a broader mission: to shape technology into a force for good. As Biz Stone continues to evolve as a tech entrepreneur and investor, his influence on both digital culture and responsible innovation remains significant.
