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Marc Andreessen
Andreessen in 2013
Born	Marc Lowell Andreessen (1971-07-09) July 9, 1971 (age 53) Cedar Falls, Iowa, U.S.
Education	University of Illinois at Urbana\u2013Champaign (BS)
Occupations	\n Investor \n entrepreneur \n software engineer \n
Known for	\n Mosaic \n Netscape \n Opsware \n Andreessen Horowitz \n
Spouse	\n Laura Arrillaga (m. 2006)
Children	1^[1]
Relatives	John Arrillaga (father-in-law)
Website	a16z.com/author/marc-andreessen

Marc Lowell Andreessen (/\u00e6n\u02c8dri\u02d0s\u0259n/ AN-dree-sen; born July 9, 1971) is an American businessman and former software engineer. He is the co-author of Mosaic, the first widely used web browser with a graphical user interface; co-founder of Netscape; and co-founder and general partner of Silicon Valley venture capital firm Andreessen Horowitz. He co-founded and later sold the software company Opsware to Hewlett-Packard; he also co-founded Ning, a company that provides a platform for social networking websites. He is an inductee in the World Wide Web Hall of Fame. Andreessen's net worth is estimated at $1.9 billion as of January 2025.\n

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v t e Netscape
Browser versions	\n Mosaic Netscape \n Netscape Navigator\n 1 \n 2 \n 3 \n 4 \n Netscape Communicator\n 4 \n 5 \n Netscape\n 6 \n 7 \n Netscape Browser 8 \n Netscape Navigator 9 \n Netscape Plugin Application Programming Interface (NPAPI) \n
E-mail clients	\n Netscape Mail & Newsgroups \n Netscape Messenger 9 \n
Other components	\n Netscape Composer \n
Server software	\n Netscape Enterprise Server \n Netscape Application Server \n Netscape Proxy Server \n Netscape Directory Server \n Netscape Server Application Programming Interface (NSAPI) \n
Web services	\n Netscape.com \n Propeller.com \n Open Directory Project \n Netscape ISP \n
People	\n Eric J. Bina \n James H. Clark \n Brendan Eich \n Daniel Glazman \n Jamie Zawinski \n Lou Montulli \n Marc Andreessen \n Eric A. Meyer \n Mitchell Baker \n
See also	\n Gecko \n JSSS \n Mariner \n Netscape 5 \n Netscape Public License \n Mozilla \n AOL \n iPlanet \n

v t e AOL
Websites	\n Aol.com \n Yahoo! Search \n
Related	\n AOLserver \n ART image file format \n Elwood Edwards \n One by AOL \n OSCAR protocol \n TAC \n Ultravox \n Yahoo \n Acquisitions \n
Former	\n AIM \n Alto Mail \n buy.at \n Community Leader Program \n CompuServe \n DMOZ \n Explorer \n FanHouse \n Ficlets \n GameDaily \n Gravity \n Hometown \n In2TV \n Neverwinter Nights \n On \n Politics Daily \n press \n Propeller.com \n Radio \n Radio KOL \n Seed \n Singingfish \n Socialthing \n TOC protocol \n MSN TV \n TV \n

v t e Dot-com bubble
People	\n Daniel Aegerter \n Marc Andreessen \n Bob Bernard \n Jeff Bezos \n Henry Blodget \n James H. Clark \n Cynthia Cooper \n Bob Davis \n Bernard Ebbers \n David Filo \n Charlie Gasparino \n Richard Grasso \n Alan Greenspan \n Jack Grubman \n Josh Harris \n Jeff Hawkins \n Howard Jonas \n Gerry Kearby \n Timothy Koogle \n Kenneth Lay \n Arthur Levitt \n Mary Meeker \n PayPal Mafia \n Kevin O'Leary \n Jason Olim \n Stephan Paternot \n Jim Rutt \n Michael J. Saylor \n Jeffrey Skilling \n Eliot Spitzer \n Scott D. Sullivan \n Kaleil Isaza Tuzman \n Julie Wainwright \n Jerry Yang \n
Companies	\n 3Com \n 360networks \n AboveNet \n Actua Corporation \n Airspan Networks \n Akamai Technologies \n Alteon WebSystems \n Amazon \n America Online \n Arthur Andersen \n Ask Jeeves \n Blue Coat Systems \n Boo.com \n Books-A-Million \n Broadband Sports \n Broadcast.com \n CDNow \n Chemdex \n CMGI Inc. \n Cobalt Networks \n Commerce One \n Covad \n Cyberian Outpost \n CyberRebate \n Digex \n Digital Convergence Corporation \n Digital Insight \n Divine \n DoubleClick \n eBay \n eGain \n Egghead Software \n Enron \n Epidemic Marketing \n Excite \n Flooz.com \n Freei \n Gadzoox \n GeoCities \n Global Crossing \n govWorks \n Handspring \n Healtheon \n HomeGrocer \n HotBot \n Infoseek \n InfoSpace \n Inktomi \n Interactive Intelligence \n Internet America \n iVillage \n iWon \n Kozmo.com \n lastminute.com \n The Learning Company \n Liquid Audio \n LookSmart \n Lycos\n Angelfire \n Tripod \n MarchFirst \n MicroStrategy \n Net2Phone \n NetBank \n Netscape \n Network Solutions \n NorthPoint Communications \n OmniSky \n Palm, Inc. \n PayPal \n Pets.com \n PFSweb \n Pixelon \n PLX Technology \n Prodigy \n Pseudo.com \n Radvision \n Razorfish \n Redback Networks \n Register.com \n Ritmoteca.com \n Savvis \n Scout Electromedia\n modo \n Terra \n theGlobe.com \n Think Tools \n TIBCO Software \n Tradex Technologies \n Transmeta \n uBid \n United Online \n USinternetworking \n UUNET \n VA Linux Systems \n Verio \n VerticalNet \n Vignette Corporation \n WebChat Broadcasting System \n Websense \n Webvan \n WorldCom \n World Online \n Yahoo! \n
History	\n Enron scandal \n Irrational exuberance \n Sarbanes\u2013Oxley Act \n Telecoms crash \n Trial of Kenneth Lay and Jeffrey Skilling \n WorldCom scandal \n
Publications	\n Blood on the Street \n Conspiracy of Fools \n The Industry Standard \n The PayPal Wars \n
Broadcast media	\n e-Dreams \n Enron: The Smartest Guys in the Room \n Startup.com \n Valley of the Boom \n
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v t e Andreessen Horowitz
Founders	\n Marc Andreessen \n Ben Horowitz \n
Selected general partners	\n Martin Casado \n Chris Dixon \n Jeff Jordan \n Sriram Krishnan \n Peter J. Levine \n John O'Farrell \n Vijay S. Pande \n Scott Weiss \n
Selected investments	\n Airbnb \n Foursquare \n Groupon \n Lytro \n Twitter, Inc. \n ThirdLove \n

Authority control databases $\"Edit$
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National	Germany United States France BnF data Portugal Norway Croatia Israel
Academics	Scopus DBLP
Other	IdRef

Early life and education

Career

Netscape

Opsware

Andreessen Horowitz

Investments

Industry influence

Ventures

Criticism

Conflict of interest

Personal life

Politics

Accolades

Writings

References

External links

Marc Andreessen

From Wikipedia