"Who founded Anthropic" and "who is Dario Amodei" are searched almost as often as the company itself. In one line: Anthropic was co-founded in 2021 by former OpenAI staff, led by the siblings Dario Amodei (CEO) and Daniela Amodei (President). This guide covers both founders' backgrounds and roles, the other co-founders, and a common misconception — based on official and credible sources.
- Founders: the Amodei siblings — Dario (CEO) and Daniela (President). They are siblings, not spouses.
- When: 2021, with other former OpenAI colleagues.
- Roles: Dario leads research direction, public communication, and vision; Daniela runs operations, policy, business, and the safety org.
- Why: reported differences over AI-safety direction led them to leave OpenAI and build a safety-first company.
Who founded Anthropic?
Anthropic was co-founded in January 2021 by former OpenAI people. At the center are the siblings Dario Amodei (CEO) and Daniela Amodei (President). The exact number of co-founders is reported as either seven or eight depending on the source, so it's hard to state definitively. Co-founders commonly named in reporting include Jared Kaplan, Tom Brown, Chris Olah, Sam McCandlish, Jack Clark, and Ben Mann.
For context, President here is the role that runs the whole company's operations apart from research.
Dario Amodei (CEO)
Dario Amodei is Anthropic's CEO and co-founder, born in 1983. A researcher by background, he earned a PhD at Princeton (reported as physics / computational neuroscience), worked at Baidu and Google, then joined OpenAI in 2016. At OpenAI he became VP of Research (vice president of research) and is reported to have been deeply involved in developing the language models GPT-2 and GPT-3.
At Anthropic he leads research direction and company vision while serving as the main public figure, frequently writing and speaking about the risks and benefits of AI. He also testifies before the U.S. Congress. He published the essays "Machines of Loving Grace" (October 2024) and "The Adolescence of Technology" (January 2026). He was named to Time's 100 most influential people in 2025, and again in 2026 alongside Daniela.
Daniela Amodei (President)
Daniela Amodei is Anthropic's President and co-founder, and Dario's younger sister. She holds a B.A. in English literature from UC Santa Cruz, and after a stint in politics joined the fintech company Stripe as an early employee in 2013. She later joined OpenAI in 2018, where she served as VP of Safety and Policy.
At Anthropic she oversees most things outside research — operations, policy, business, hiring, and the safety organization. She is widely credited with the company's expansion into regulated industries such as finance, healthcare, and government. Daniela was also named to the Time 100 (AI list in 2023, and again in 2026).
Why did they leave OpenAI to start Anthropic?
The most widely reported reason is differences over AI-safety direction. Per multiple accounts, the Amodei siblings and the colleagues who left with them believed the next generation of AI needed to be built around safety from day one, and were concerned that commercialization was outpacing safety. They left OpenAI as a group in late 2020–2021 and built a safety-first company of their own. That's why Anthropic has made "AI safety" its identity from the start.
Who are the other co-founders?
Beyond the Amodei siblings, people who had led research, safety, and policy at OpenAI joined too. Commonly named are Jared Kaplan (now Chief Science Officer, CSO), Jack Clark (policy), and research/technical figures such as Tom Brown, Chris Olah, Sam McCandlish, and Ben Mann. Titles and roles can change over time, so check official materials for the latest.
FAQ
Are Dario and Daniela married?
No. They are siblings. It's a common mix-up, but they are not a married couple.
Who is Anthropic's CEO?
Dario Amodei. Daniela Amodei serves as President.
What are their net worths?
Outlets like Forbes publish estimates, but they vary widely by methodology, so no single figure is reliable. Since Anthropic is private (not listed on a stock market) and ownership percentages aren't disclosed, treat any number as an estimate.
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This is an informational summary synthesizing public reporting and official materials as of June 2026. People and titles can change — verify primary sources before any important quote. usingclaude.com is an independent, unofficial resource and is not affiliated with Anthropic.