Companies to Watch: Private Companies

Name: 10gen, www.10gen.com
Year Founded: 2008
Number of Employees: 8
Major Investors: Union Square Ventures
Total Invested: $1.5 million
Key Product: MongoDB
Technology: Sponsors an open-source database that makes cloud applications easier to build.

Name: 3Tera, www.3tera.com
Year Founded: 2004
Number of Employees: 30
Major Investors: Undisclosed
Total Invested: Undisclosed
Key Product: AppLogic
Technology: Allows customers to move data and applications easily between its cloud platform and private data centers.

Name: Appistry, www.appistry.com
Year Founded: 2001
Number of Employees: 35
Major Investors: Stuart Mill Venture Partners
Total Invested: $23 million
Key Product: Appistry CloudIQ
Technology: Makes it possible to move business functions to a cloud while keeping existing
systems.

Name: Elastra, www.elastra.com
Year Founded: 2007
Number of Employees: 35
Major Investors: Amazon, Bay Partners, Hummer Winblad Venture Partners
Total Invested: $14.6 million
Key Product: Elastra Enterprise Cloud Server
Technology: Helps businesses use public clouds in concert with their internal IT setups.

Name: Enomaly, www.enomaly.com
Year Founded: 2004
Number of Employees: 20
Major Investors: Intel
Total Invested: Undisclosed
Key Product: Elastic Computing Platform
Technology:Creates tools that give customers the freedom to change cloud providers.

Name: XCalibre, www.flexiscale.com
Year Founded: 1997
Number of Employees: 26
Major Investors: Funded by revenue
Total Invested: N/A
Key Product: FlexiScale
Technology: Helps European startups comply with data protection and export regulations.

Name: Heroku, www.heroku.com
Year Founded: 2007
Number of Employees: 11
Major Investors: Redpoint Ventures, Y Combinator
Total Invested: $3 million
Key Product: Heroku
Technology: Allows rapid deployment of systems based on Ruby on Rails, a popular way of building Web applications.

Name: RightScale, www.rightscale.com
Year Founded: 2006
Number of Employees: 100
Major Investors: Benchmark Capital, Index Ventures
Total Invested: $22.2 million
Key Product: RightScale Cloud Management ­Platform
Technology: Provides essential hand-holding for companies wanting to run applications on a variety of public and private clouds.

Name: Joyent, www.joyent.com
Year Founded: 2004
Number of Employees: 25
Major Investors: Seed investment from PayPal cofounder Peter Thiel
Total Invested: Undisclosed
Key Product: Accelerator, ­Connector
Technology: Provides on-demand storage and computing services for Web-application developers.

Name: ServePath, www.gogrid.com
Year Founded: 1994
Number of Employees: 100+
Major Investors: Funded by revenue
Total Invested: N/A
Key Product: GoGrid
Technology: Hopes to beat Amazon by wooing IT administrators with management software that behaves more like the tools they are already familiar with.

Read more:

» Technology Overview: Conjuring Clouds » Case Study: Making Art Pay » Map: Water-Powered Computers » Industry Challenges: The Standards Question » Market Watch: Virtual Computers, Real Money

» Companies to Watch Private, and Public » Open Source Projects and Research Consortiums » Key Players » How it Works: Cloud Computing » Webcast Interview with 10Gen CEO

Editors note: The table for 3Tera should have stated that the company does not disclose funding information.