Facebook launched in 2004 from a Harvard dorm room

Facebook started in February 2004 as a project by Mark Zuckerberg, then a Harvard University student. He built it originally as "TheFacebook" — a social network limited to Harvard students. The site let students create profiles, list their interests, and connect with classmates.

Within a month, more than half of Harvard's undergraduate students had joined. By the end of 2004, Facebook had expanded to other universities and had roughly one million users. The platform's early growth came from its exclusivity — you needed a college email address to sign up, which made membership feel like joining a closed community rather than a public social network.

The name changed from "TheFacebook" to simply "Facebook" in 2005, the same year the company opened membership to high school students and, later, to anyone 13 and older with a valid email address. This shift from exclusive to open access is what transformed Facebook from a college networking tool into a mass-market platform.

Key Takeaways

  • Facebook was founded in February 2004 by Mark Zuckerberg as a Harvard-only social network called TheFacebook.
  • The platform expanded to other universities in 2004 and reached one million users by the end of that year.
  • Facebook opened to high school students and then the general public in 2005, dropping the "The" from its name.
  • The shift from exclusive college network to open platform in 2005 set the stage for Facebook to become the world's largest social media company.

How Facebook grew from college project to global platform

Facebook's early growth strategy relied on exclusivity. By limiting access to college students first, the site created demand and word-of-mouth momentum. When Zuckerberg opened it to high schools in 2005, the same pattern repeated — teenagers wanted to join because their peers were already there.

The company moved its headquarters from Cambridge, Massachusetts to Palo Alto, California in 2005, signaling a shift from student project to serious business. By 2006, when Facebook opened to anyone 13 or older, the platform had roughly 12 million users. That number grew to 50 million by 2008 and 500 million by 2010.

Facebook's growth accelerated further after it introduced the News Feed in 2006 — a feature that showed users updates from their friends in real time rather than requiring them to visit each friend's profile individually. This single feature change made the platform more engaging and addictive, keeping users on the site longer and checking it more often.

The role of mobile apps and acquisitions

Facebook's growth trajectory changed again in 2009 when the company released its first mobile app for the iPhone. Smartphones were becoming more common, and Facebook adapted faster than competitors. By 2012, mobile users outnumbered desktop users on the platform.

The company also grew through acquisition. Facebook bought Instagram in 2012 for $1 billion — a price many thought excessive at the time. Instagram had only 13 million users then, but Facebook recognized the platform's potential. Today, Instagram is one of the world's largest social networks, and Facebook owns it.

In 2014, Facebook acquired WhatsApp, a messaging app, for $19 billion. These purchases showed that Facebook's growth strategy shifted from building features internally to buying successful competitors and complementary services. The company now owns Facebook, Instagram, WhatsApp, and Threads, making it the dominant player in social media and messaging.

Why 2004 matters for understanding Facebook today

The year Facebook started matters because it explains how the platform became so large. Starting as an exclusive college network created a culture of peer-to-peer connection that became Facebook's core strength. Unlike earlier social networks that tried to be everything to everyone, Facebook succeeded by starting narrow and expanding gradually.

Understanding Facebook's origins also helps explain its business model. From the beginning, Facebook collected data about its users — their interests, connections, and behavior. This data became the foundation for targeted advertising, which remains Facebook's primary source of revenue today. The company makes money by selling advertisers the ability to reach specific groups of users based on their profiles and activity.

How Facebook's founding year connects to its current structure

Facebook's 2004 launch predates most of today's major social platforms. Twitter started in 2006, YouTube in 2005, Instagram in 2010, and TikTok in 2016. This head start gave Facebook time to build infrastructure, accumulate users, and establish itself as the default social network for adults and older teenagers.

The company's founding also occurred before smartphones existed. Facebook had to adapt its design and strategy as technology changed — first for mobile phones, then for tablets, then for different screen sizes and connection speeds. This history of adaptation is part of why Facebook remains relevant despite being nearly 20 years old, while many earlier social networks have disappeared.

Frequently Asked Questions

Was Facebook the first social network?

No. Platforms like Friendster (2002) and MySpace (2003) existed before Facebook. However, Facebook's design — focusing on real names and real connections rather than anonymous profiles or customizable pages — proved more appealing to mainstream users. Facebook's success came from doing something existing networks did, but better.

Why did Facebook start at Harvard instead of somewhere else?

Mark Zuckerberg was a Harvard student when he built TheFacebook. He had access to Harvard's student directory and the technical infrastructure to launch the site. Starting at a prestigious university also gave the platform credibility and made it attractive to students at other elite schools, which helped it spread quickly.

How many users did Facebook have when it started?

Facebook had zero users when it launched in February 2004. Within one month, over 50 percent of Harvard's undergraduate students had joined. By the end of 2004, it had roughly one million users across multiple universities. Growth accelerated dramatically after opening to the general public in 2005.

Is Facebook still growing, or has it peaked?

Facebook's user growth in developed countries has slowed, but the platform continues to grow in developing regions. As of recent reports, Facebook has roughly 3 billion monthly active users worldwide. The company now focuses on keeping existing users engaged rather than acquiring new ones, which is why it invests heavily in features like Reels to compete with TikTok.