According to Fortune, Facebook cofounder Dustin Moskovitz and his wife Cari Tuna are giving away an astonishing $20 billion fortune through their philanthropic efforts. The couple has already donated more than $4 billion total, including over $600 million in 2025 alone, through their foundation Good Ventures. Moskovitz, who helped launch Facebook with Mark Zuckerberg in 2004, now has a $10 billion fortune primarily from his Meta stock in the $1.6 trillion company. Tuna, a former Wall Street Journal reporter, has been leading their giving since 2011 and was the youngest signatory to the Giving Pledge at age 25. Their current focus includes global health, AI safety, and pandemic prevention, with major grants to organizations like the Malaria Consortium and Evidence Action.
Effective altruism in action
Here’s what makes their approach different: they’re not just throwing money at problems. They’re using effective altruism principles, which basically means using data and evidence to figure out how to help the most people per dollar spent. It’s like optimizing philanthropy for maximum impact. And they started funding pandemic prevention and AI safety research years before COVID-19 or ChatGPT made those topics mainstream. That’s some serious foresight.
The scale of giving
We’re talking about serious money here. They’ve placed another $10 billion into Good Ventures, their foundation, on top of the $4 billion they’ve already given away. But here’s the thing: despite signing The Giving Pledge back in 2010, they’re actually following through when many billionaires haven’t. They’re giving with what Moskovitz called “urgency and mindfulness” – trying to move fast while still being strategic about where the money goes.
Beyond Facebook wealth
Moskovitz didn’t just ride the Facebook wave forever. He went on to build Asana, the project management platform that’s now worth around $3 billion. He recently stepped down as CEO to focus more on philanthropy. Meanwhile, Tuna transitioned from journalism to full-time philanthropy leadership. It’s interesting how they’ve both shifted from building companies to systematically giving away the wealth those companies generated.
Why this matters
Look, we hear a lot about billionaire philanthropy that doesn’t always deliver. But this couple is different. They’re funding things that governments and traditional philanthropy often overlook – like AI safety research with $30 million to OpenAI’s nonprofit back in 2017, or moving a $500 million stake in Anthropic into a nonprofit vehicle. They’re thinking long-term about existential risks while also addressing immediate needs like malaria prevention. And they’re partnering with other major donors like the Gates Foundation on initiatives like the $100 million Lead Exposure Action Fund. It’s a refreshing approach in a world where tech wealth often just accumulates rather than circulates back to society.
