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Michael Seibel

Michael Seibel

Michael Seibel is a group partner of Y Combinator, and the co-founder and former CEO of both (which later became Twitch) and SocialCam.

Michael Seibel is the co-founder and former CEO of both (later known as Twitch) and Socialcam. He has been a full-time group partner of Y Combinator since December 2014, where part of his job is to reach out to underrepresented minorities in both the company itself and Silicon Valley. He is also an investor and advisor of many companies and funds, including Reddit, Qwest, PayFazz, and Squire. was a livestreaming website where users broadcast themselves online doing various activities in real time. Seibel co-founded in 2007 with Justin Kan, Emmett Shear, and Kyle Vogt. established different categories for video broadcasts so users could sort by content. Hosting sexual content on the site was prohibited. Accounts were called channels, and live channels were set at the top of each applicable category page. At one point, had over 30,000 channels available. Some categories included featured, animal, creativity, entertainment, news, poker, sports, social, and other. The site's video games category quickly proved to be the most popular by far; the category eventually had more user views than all of the other site categories combined. In June 2011, created a separate platform for video game streaming, which they called TwitchTV. In 2014, Amazon bought TwitchTV for $970 million. It was rebranded as Twitch Interactive.


Seibel co-founded Socialcam with Ammon Bartram and Guillaume Luccisano. Socialcam was founded sometime between late 2010 and 2012, with various sources reporting multiple dates in that timeframe. Socialcam was a mobile app that allowed users to post, edit, and share videos online, similar to Instagram. The app had a built-in editing feature that included picture filters, sound clips, and more. Users could sign up through email or Facebook, the latter of which allowed users to find and follow their friends who were also registered through the site. Socialcam allowed unlimited length videos and cloud storage. In July 2012, Autodesk announced it was acquiring Socialcam for approximately $60 million. The deal was expected to close in late 2012, after the end of the company's fiscal third quarter. Socialcam was closed in October 2015.

Personal life

Before beginning his work in the technology field, Seibel was a finance director for a 2006 US Senate campaign. He graduated from Yale University in 2005 with a Bachelor's degree in political science. As of 2022, he lives in San Francisco, California with his wife Sarah and their son Jonathan.


Seibel co-founds, which later becomes Twitch.
Seibel graduates from Yale University with a Bachelor's in political science.
October 7, 1982
Michael Seibel was born in New Jersey.

Invested in


Further Resources


Michael Seibel - Building Product


Justin Kan
January 8, 2021
Business Insider
Seibel, a first investor in hundreds of startups and a board member of Reddit and Dropbox, has known Kan since their Yale days.
Megan Rose Dickey
August 28, 2020
Welcome back to Human Capital, where we break down the latest in labor, and diversity and inclusion in tech. This week, we're looking at the launch of the Diversity Riders initiative in venture capital and how it can go further, Instacart's labor practices and some alternative, more inclusive approaches to running a startup. Also, Y [...]
Anthony Ha
August 27, 2020
In the aftermath of George Floyd's death and widespread protests for racial justice, a number of venture capitalists made public statements about wanting to improve diversity in the tech industry -- and more specifically to fund more diverse founders. Their comments are certainly worth applauding, but actual change is a lot harder. And if it [...]
Anthony Ha
June 10, 2020
Uber stocks tumble after reports that it will lose out on acquiring Grubhub, Reddit appoints a new board member and Republican senators question the legal protections of large social media platforms. Here's your Daily Crunch for June 10, 2020. 1. Uber shares tumble 5% as reports indicate it will lose Grubhub deal to European rival [...]
Brian Heater
June 10, 2020
On June 5, Alexis Ohanian announced he was stepping down from Reddit's board of directors. "I believe resignation can actually be an act of leadership from people in power right now," the site's founder and former CEO announced. "To everyone fighting to fix our broken nation: do not stop." The move came as communities across [...]


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