Salesforce.com was founded in 1999 by former Oracle executive Marc Benioff. In June 2004, the company went public on the New York Stock Exchange under the stock symbol CRM. Initial investors in salesforce.com were Marc Benioff, Larry Ellison, Halsey Minor, Magdalena Yesil and Igor Sill, Geneva Venture Partners.
Salesforce.com is headquartered in San Francisco, California, with regional headquarters in Dublin (covering Europe, Middle East, and Africa), Singapore (covering Asia Pacific less Japan), and Tokyo (covering Japan). Other major offices are in Toronto, New York, London, Sydney, and San Mateo, California. Salesforce.com has its services translated into 15 different languages and currently has 43,600 customers and over 1,000,000 subscribers. In 2008, Salesforce.com ranked 43rd on the list of the largest software companies in the world, and was added to the S&P 500 index effective after Friday, September 12, 2008. It bought Jigsaw for $142 million; Jigsaw is a company with a database of 21 million professionals
The following is a list of pending acquisitions by salesforce.com:
- Rypple - a cloud-based social performance management company 
The following is a complete list of acquisitions by salesforce.com:
- Sendia (April 2006)  for US$15 million in cash – now Force.com Mobile
- Kieden (August 2006)  – now Salesforce for Google AdWords
- Kenlet (January 2007) – Original product CrispyNews used at Salesforce IdeaExchange and Dell IdeaStorm. Now relaunched as Salesforce Ideas.
- Koral (March 2007) – now Salesforce Content
- Instranet (August 2008) – now rebranded to Salesforce Knowledge
- GroupSwim (December 2009) – now part of Salesforce Chatter
- Informavores (December 2009)  – now re-branded to Visual Process Manager
- Jigsaw Data Corp. (April 2010) , the proposed deal is expected to close in the second quarter of its fiscal year 2011.
- Sitemasher (June 2010)
- Activa Live Chat (September 2010) 
- Heroku (December 2010) 
- Etacts (December 2010) 
- Dimdim (January 2011) 
Manymoon (February 2011)
- Radian 6 (March2011)
- Assistly (Sept 2011) 
In November 2007, a successful phishing attack compromised contact information on a number of salesforce.com customers, which was then used to send highly-targeted phishing emails to Salesforce users. 
Products and Services
Customer Relationship Management
Salesforce.com's CRM solution is broken down into several applications: Sales, Service & Support, Partner Relationship Management, Marketing, Content, Ideas and Analytics.
Salesforce.com's Platform-as-a-Service product is known as the Force.com Platform. The platform allows external developers to create add-on applications that integrate into the main Salesforce application and are hosted on salesforce.com's infrastructure.
These applications are built using Apex (a proprietary Java-like programming language for the Force.com Platform) and Visualforce (an XML-like syntax for building user interfaces in HTML, AJAX or Flex).
Launched in 2005, AppExchange is a directory of applications built for Salesforce by third-party developers which users can purchase and add to their Salesforce environment. As of September 2008, there are over 800 applications available from over 450 ISVs.
Salesforce users can customize their CRM application. In the system, there are tabs such as "Contacts", "Reports", and "Accounts". Each tab contains associated information. For example, "Contacts" has fields like First Name, Last Name, Email, etc.
Customization can be done on each tab, by adding user-defined custom fields. 
Customization can also be done at the "platform" level by adding customized applications to a Salesforce.com instance, that is adding sets of customized / novel tabs for specific vertical- or function-level (Finance, Human Resources, etc) features.
In addition to the web interface, Salesforce offers a Web Services API that enables integration with other systems.
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