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IndustryInformation Technology, Software
FateAcquired by Teradata
FoundedFounded as Clearpace in 2002 (2002); Renamed as RainStor in 2009 (2009)
  • Tom Longshaw
  • Andrew Wright
  • Jonathan Teague
  • Keith Summers
  • Gary Pratley

RainStor was a software company that developed a database management system of the same name designed to manage and analyze big data for large enterprises.[1][2][3] It uses de-duplication techniques to organize the process of storing large amounts of data for reference.[4] The company's origin traces back to a special project conducted by the United Kingdom's Ministry of Defence with the purpose of storing volumes of data from years of field operations for ongoing analysis and training purposes.[1][5][6]

RainStor was headquartered in San Francisco, California, United States with R&D in Gloucester, United Kingdom. The company was acquired by Teradata in 2014.[7]


Originally named Clearpace, RainStor was founded in 2002 in the United Kingdom.[1] The company was originally created to exploit technology that was developed by the United Kingdom's Ministry of Defence to store big data under the brand name DeX.[1] The company rebranded DeX as NParchive, which deduplicated and archived rarely used data, in 2008.[8]

The company and product were renamed to RainStor (a portmaneteau of relational archiving infrastructure storage) in December 2009, coinciding with a move of the management office from the United Kingdom to San Francisco.[5][9] The release of version 3.5 of RainStor software, announced in May 2009, coincided with the company's rebranding.[10][11] RainStor received $7.5 million in venture funding from Storm Ventures, Doughty Hanson Technology Ventures, Informatica, and The Dow Company in March 2010. In 2011, it received some marketing awards.[12][13][14] In October 2012, RainStor received $12 million in venture funding from Credit Suisse, Doughty Hanson Technology Ventures, Storm Ventures, the Dow Chemical Company, and Rogers Venture Partners.[15]

In October 2012, the company reported over 100 clients.[1] RainStor worked with companies in the telecommunications and finance industries, as well as with government agencies.[1]

Teradata acquired RainStor in December 2014.[7] Teradata dropped the RainStor product from its portfolio in January 2016 and it is no longer developed or marketed.


RainStor provided software for query and analysis against large volumes of machine generated data and an online data archive for regulatory compliance data retention.[1]

In October 2012, RainStor held two patents and was pursuing five additional patents.[1] The database uses a row/columnar hybrid repository.[16] The archived data is accessed using Structured Query Language (SQL).[16] RainStor software uses partition filtering, which excludes certain records from processing.[5]

RainStor runs on Apache Hadoop.[17][18] In June 2013, RainStor released version 5.5 of its software.[19] The release added user authentication protocols, access controls and policies, data encryption and user activity logs.[19]

In May 2014, the company announced protection for data from manipulation, malicious attacks, breaches, or deletion.[20]


  1. ^ a b c d e f g h Tom Taulli (October 9, 2012). "RainStor: Riding the Big Data Wave". Forbes. Retrieved January 28, 2013.
  2. ^ Klint Finley (October 4, 2012). "Big Data Company RainStor Raises $12 Million Series C From Credit Suisse And Rogers Venture Partners". TechCrunch. Retrieved January 28, 2013.
  3. ^ Derrick Harris (October 4, 2012). "RainStor raises $12M to make your big data small". GigaOM. Retrieved January 28, 2013.
  4. ^ Beyers, Tim (2014-05-18). "How HBO's "Silicon Valley" Invents the Future". The Motely Fool. Retrieved July 4, 2014.
  5. ^ a b c Chris Mellor (February 16, 2012). "Big data elephant mates with RainStor". The Register. Retrieved January 28, 2013.
  6. ^ David Zielenziger (October 4, 2012). "RainStor, Big Data Player, Gets Extra $12M Venture Capital Investment". International Business Times. Retrieved 21 April 2014.
  7. ^ a b "Teradata Acquires RainStor". Press release. December 17, 2014. Retrieved February 13, 2017.
  8. ^ Chris Mellor (November 12, 2008). "Shrinking primary databases". The Register. Retrieved 21 April 2014.
  9. ^ Chris Mellor (January 20, 2010). "Will RainStor data deduplication change the database game?". Computer Weekly. Retrieved 21 April 2014.
  10. ^ Robert Mullins (March 10, 2010). "Storage SaaS vendor RainStor lands $7.5. million in new funding". Venture Beat. Retrieved 21 April 2014.
  11. ^ Sally Whittle (May 26, 2009). "Clearpace puts archived data in the cloud". C net. Retrieved 21 April 2014.
  12. ^ "Announcing the 2011 AlwaysOn Global 250". AlwaysOn Network. July 30, 2011. Retrieved January 28, 2013.
  13. ^ "Gartner Cool Vendors 2011". Gartner. Archived from the original on May 13, 2012. Retrieved February 13, 2017.
  14. ^ "Announcing the 2011 OnDemand 100 Top Private Companies". AlwaysOn Network. March 30, 2011. Archived from the original on January 26, 2013. Retrieved January 28, 2013.
  15. ^ Faith Merino (October 4, 2012). "RainStor raises $12M to compress big data". Vator News. Retrieved 21 April 2014.
  16. ^ a b Landers, Garth (June 11, 2014). "Magic Quadrant for Structured Data Archiving and Application Retirement". Garter. Archived from the original on July 26, 2014. Retrieved February 13, 2017.
  17. ^ "RainStor Nabs $12M for Compressed Databases". Red Herring. October 18, 2012. Retrieved February 13, 2017.
  18. ^ Lucas Mearian (January 18, 2012). "RainStor launches Hadoop version of enterprise database". Computer World. Retrieved 21 April 2014.
  19. ^ a b Dan Kusnetzky (July 10, 2013). "RainStor releases Database 5.5 for Apache Hadoop". ZDNet. Retrieved 21 April 2014.
  20. ^ "RainStor Releases Compliance Data Archive Solution". Compliance Week. May 27, 2014. Retrieved February 13, 2017.