We're working on something new at CrunchBase. Edits have been disabled for a few days, but you can still contact us for urgent changes.
Back to Mobile View
Subscribe to the CrunchBase Daily for the latest on Fundings, Acquisitions, and Startup Events


Post IPO Valuation$18.1B

General Information


San Francisco, USA
1355 Market St.
San Francisco, CA, 94103


Co-Founder, Exec Chairman
VP of Platform Engineering
Show All People


Gnip, 4/2014
Cover Lockscreen, 4/2014
SecondSync, 3/2014
Mesagraph, 3/2014
MoPub, 9/2013 $350M
Trendrr, 8/2013
Marakana, 8/2013
Spindle, 6/2013
Lucky Sort, 5/2013
Ubalo, 5/2013
Bluefin Labs, 2/2013 $80M
Crashlytics, 1/2013 $100M
Cabana, 10/2012
Vine, 10/2012 $30M
Clutch.io, 8/2012
Hotspots.io, 4/2012
Posterous, 3/2012
Dasient, 1/2012
Summify, 1/2012
Whisper Systems, 11/2011
Julpan, 9/2011
Bagcheck, 8/2011
BackType, 7/2011
AdGrok, 5/2011 $10M
TweetDeck, 5/2011 $40M
Fluther, 12/2010
Smallthought Systems, 6/2010
Dabble DB, 6/2010
Cloudhopper, 4/2010
Atebits, 4/2010
Mixer Labs, 12/2009 $5.2M
Values of n, 11/2008
Summize, 7/2008 $15M





Twitter is an online social network and a microblogging service that enables users to send and read “tweets,” which are text messages limited to 140 characters. Registered users of Twitter are able to read and post tweets via the web, SMS or mobile applications.

Created in March 2006, Twitter is a global real-time communications platform with 400 million monthly visitors to twitter.com and more than 200 million monthly active users around the world. It receives a billion tweets every 2.5 days on every conceivable topic. World leaders, major athletes, star performers, news organizations and entertainment outlets are among the millions of active Twitter accounts through which users can truly get the pulse of the planet.

Twitter is based in San Francisco and has offices in New York City, Boston, San Antonio and Detroit. It was founded by Jack Dorsey, Evan Williams, Biz Stone and Noah Glass

Recent Milestones



Twitter for Small Business

Added: 11/8/12


Twitter screenshot
Above: Twitter User Profile Page
Uploaded: 11/8/12



StageIn Development
Launch DateNovember 4, 2009
Closed DateJuly 31, 2009

Twicco.jp is a group and community feature for Twitter (currently available only in Japan). In Loic Le Meur’s demo video you can see it lets users create and follow a group instead of an individual account. Twitter Japan, a joint venture with Digital Garage, was already differentiating itself from the US version with ads in the feeds and therefor a monetization option right from the beginning.

Twitter screenshot
Above: Twicco Homepage
Uploaded: 11/5/08



Loic Le Meur demo’s Twicco

Twitter Blocks

Get an invitation to this site from InviteShare here!
StageIn Development
Closed Date2010
Closed Postdebopportunities.com
Tags socialnetworking

Twitter Blocks is a real-time visualization tool for recent updates from a user’s friends and their friends’ network of friends (and their friends’ friends’ network of friends, etc.).

Twitter screenshot
Above: Twitter Blocks Screenshot -- #1
Uploaded: 2/5/08

Stock Price

Traffic Analytics






  1. Twitter Acquires Longtime Partner And Social Data Provider Gnip (techcrunch.com) []
  2. Twitter Acquires Android Lockscreen App Cover, Moves Deeper Into Mobile Services (techcrunch.com) []
  3. Twitter Buys France’s Mesagraph And UK’s SecondSync To Ramp Up Social TV Efforts In Europe (techcrunch.com) []
  4. Twitter Buys France’s Mesagraph And UK’s SecondSync To Ramp Up Social TV Efforts In Europe (techcrunch.com) []
  5. Twitter Buys MoPub To Up The Ante In Mobile Advertising (techcrunch.com) []
  6. With Trendrr Acquisition, Twitter Continues To Beef Up Its Social TV Efforts (techcrunch.com) []
  7. Twitter Buys Open Source Training Company Markana To Power New “Twitter University” For Engineers (techcrunch.com) []
  8. Twitter Acquires Local Discovery Startup Spindle, Will End Spindle Service (techcrunch.com) []
  9. Twitter Acquires Data-Mining Startup Lucky Sort (pevc.dowjones.com) []
  10. Twitter Acquires Palo Alto-Based Scalable Computing Startup Ubalo (techcrunch.com) []
  11. How Twitter Came to Boston: The Story Behind Two Very Different Acquisitions (bostinno.com) []
  12. Crashlytics Tops $100M (xconomy.com) []
  13. Twitter Acquires Cabana (finsmes.com) []
  14. Jack Dorsey Still Has Pull at Twitter. Just Ask the Vine Guys. (allthingsd.com) []
  15. Twitter Strengthens Its Mobile Platform: Buys A/B App Tester Clutch.io, Shutting Down Service In November (techcrunch.com) []
  16. Twitter Acquires Social Analytics Startup Hotspots.io (techcrunch.com) []
  17. Citation Needed []
  18. Twitter Just Acquired A Huge Anti-Spam Startup (businessinsider.com) []
  19. Twitter Acquires, Shuts Down Social News Startup Summify (tctechcrunch2011.wordpress.com) []
  20. Twitter acquires Android security startup Whisper Systems (venturebeat.com) []
  21. Twitter Acquires Julpan, The Startup By The Guy Who Helped Perfect Google Search (techcrunch.com) []
  22. Twitter Acquires List Sharing And Discovery Platform Bagcheck, Sam Pullara Joins Engineering Team (techcrunch.com) []
  23. Twitter Acquires Social Analytics Platform BackType (techcrunch.com) []
  24. Twitter Said To Acquire Adgrok (ibtimes.com) []
  25. Twitter To Buy TweetDeck For $40 Million - $50 Million (techcrunch.com) []
  26. TechCrunch (techcrunch.com) []
  27. Twitter Buys Analytics Startup Smallthought Systems (paidcontent.org) []
  28. TechCrunch []
  29. Twitter Buys Cloudhopper To Bolster Its SMS Service (techcrunch.com) []
  30. Twitter Blog (blog.twitter.com) []
  31. Twitter Acquires Mixer Labs To Step Up Geo-Location (techcrunch.com) []
  32. Values of n Blog (valuesofn.com) []
  33. Twitter Buys Summize For About $15M: Gets Search - And Maybe A Business Model Read more: http://www.businessinsider.com/2008/7/twitter-buys-summize-for-about-15m-stock-and-cash (businessinsider.com) []
  34. More Information On That Secretive Twitter Financing (techcrunch.com) []
  35. Twitter Announces Their Funding, Calls Itself A Communication Utility (techcrunch.com) []
  36. Twitter Raises $35 Million Series C From Benchmark and IVP, Others (techcrunch.com) []
  37. Twitter (blog.twitter.com) []
  38. http://www.altassets.net/private-equity-news/article/nz17642.html (altassets.net) []
  39. techcrunch.com []
  40. Twitter starts buzz with reported $400M VC round (masshightech.com) []
  41. Twitter Closing Its $400M Secondary Offering Tomorrow (techcrunch.com) []
  42. Twitter Fails To Fail, Community Rejoices (techcrunch.com) []
    Twitter Partners With Summize to Cover Apple News (techcrunch.com) []
    What's Going On? (blog.twitter.com) []
    Twitter Starts Blacklisting Spammers (techcrunch.com) []
    VP Lee Mighdoll Out At Twitter, Business Plan Still MIA (techcrunch.com) []
    Amateur Hour Over At Twitter? (techcrunch.com) []
    Twitter! Japan! Ads! (techcrunch.com) []
    Twitter Saves Man From Egyptian Justice (techcrunch.com) []
    Introducing John Adams and Rudy (blog.twitter.com) []
    Odeo Releases Twttr (techcrunch.com) []
    twitter.com []
    Twitter has 190 million users and they tweet 65 million times a day. (businessinsider.com) []
    Twitter handles 800 million search queries per day, (businessinsider.com) []
    Twitter Now Over 145 Million Users, Almost 300,000 Apps (techcrunch.com) []
    businessinsider.com []
    Twitter Raising New Venture Round at $3 Billion Valuation (techcrunch.com) []
    Twitter's Huge New Round Of Funding From Kleiner Perkins Will Close Next Week (businessinsider.com) []
    Andreessen Horowitz Invests $80 Million In Twitter (businessinsider.com) []
    Twitter's Biz Stone: "We Are Not Valued At $10 Billion" (techcrunch.com) []
    Twitter And Mediasift Partner To Resell Firehose Data (techcrunch.com) []
    Twitter Close To Acquiring AdGrok (techcrunch.com) []
    Twitter Reaches 200 Million Tweets A Day, But How Many Come From Bots? (techcrunch.com) []
    Twitter confirms investment from Facebook, Zynga investor DST (venturebeat.com) []
    Twitter Reaches New Milestone: 100 Million Users (More Than Half On Mobile) (paidcontent.org) []
    Twitter Files For $1 Billion IPO, Will List As TWTR (techcrunch.com) []

Jobs & Fundraising


Share this page on Twitter or Facebook:
Or copy this code to embed a widget: customize »

TechCrunch Posts TechCrunch Logo Small Picture

Techmeme Posts Techmeme Logo Small Picture

External Links

CrunchBase API


Become a Sponsor
Terms of Service | Privacy Policy | Licensing Policy