San FranciscoI started thinking about San Francisco, as I was planning to go to WordCamp San Francisco this year (and I organize WordCamp Victoria).

I have also been one of the organizers for Social Media Club Victoria, and SMC has it’s global home in San Francisco.

We already know that San Francisco is the center of the universe for social media, but I had no idea just how much so. Here’s a short list of companies based in that part of the world (you may have heard of a couple of them):

  • Facebook (Palo Alto) – Facebook, FriendFeed
  • Twitter
  • LinkedIn (Mountain View)
  • Google (Mountain View) – Buzz, Wave, Blogger, FeedBurner, Google Connect
  • Yahoo! (Sunnyvale) – Flickr, Meme
  • Digg
  • Automattic* – WordPress.com, PollDaddy, IntenseDebate, Gravatar, Akismet
  • eBay (San Jose) – StumbleUpon
  • Posterous.com
  • Ning (Palo Alto)
  • Technorati
  • Flixster
  • Plaxo (Mountain View)
  • Photobucket
  • Seesmic

* Automattic claims to be from everywhere, but I included them on this list because a large number of their people are based in the San Francisco area.

New York has a few companies that have made an impact in the business – Vimeo, Tumblr, Meetup.com, and Foursquare to name a few.

For science fiction geeks, San Francisco is also the headquarters for both Skynet (Terminator), and Star Fleet Academy (Star Trek).

Which social media companies did I miss? Add to the comments.