The Social Network Era
Six years from a Palo Alto rental house to half a billion users — the expansion era that made Facebook a world-historical company.
Palo Alto, summer 2004
The team rented a house in Palo Alto — later mythologized as the era of coding marathons and the famous “move fast and break things” ethos. Peter Thiel’s $500,000 angel investment gave them runway; the company incorporated that July. Zuckerberg, still 20, was suddenly running a company with real money and real expectations.
The funding ladder
- 2004: Thiel, $500K.
- 2005: Accel Partners, $12.7 million at roughly an $87.5M valuation — with Jim Breyer joining the board.
- 2006: Greylock and others, ~$27.5M at a $500M valuation.
- 2007: Microsoft, $240 million at a $15 billion valuation — a headline number that made Facebook’s worth undeniable.
Each round was also a statement of intent: raise enough to grow without selling.
The offers he refused
Two reported acquisition moments define the era:
- 2006 — Yahoo, reportedly around $1 billion. Zuckerberg refused. The figure is widely reported; neither party has confirmed it on the record. At the time, Facebook had roughly 10 million users and no meaningful revenue — the refusal looked audacious. In retrospect it looks like the single highest-leverage “no” in tech history.
- 2007–08 — Microsoft and Google both circled with partnership and acquisition interest. The Microsoft investment was structured to keep Facebook independent.
Opening the gates
- September 2006: registration opens beyond students — anyone 13+ with an email address. Growth explodes, and the culture war over “Facebook is ruined” begins (it never ends; the growth never stops).
- May 2007: Facebook Platform lets outside developers build apps inside Facebook. Zynga’s games ride the platform to a multi-billion-dollar IPO of their own.
The Beacon misstep
Late 2007 brought Beacon, an advertising product that broadcast users’ purchases on partner sites into their friends’ feeds. The backlash was immediate and fierce; Zuckerberg later called it a mistake and shut it down. It was the first clear lesson of the era: at Facebook’s scale, a product decision is a social decision. The News Feed launch had taught the same lesson a year earlier — see the News Feed.
Sandberg and the business
In March 2008 Sheryl Sandberg left Google to become COO. Where Zuckerberg was product, Sandberg was business: she built the advertising operation — self-serve ads, targeting infrastructure, the sales machine — that turned a beloved money-losing website into a profitable company. The partnership defined Facebook’s second decade.
500 million
By July 2010 Facebook announced 500 million active users — roughly 1 in 14 humans. Time named Zuckerberg its Person of the Year. And that October, The Social Network premiered, freezing a dramatized version of these years into popular culture. The record behind the drama is examined on myth vs. record.
Source notes
- Funding rounds and valuations: company announcements and contemporaneous reporting (Kirkpatrick 2010; Wall Street Journal).
- Yahoo offer: reported figure, unconfirmed on the record — flagged as such.
- User milestones: Facebook announcements; 500M announced 21 July 2010.