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Xobni Corporation
Type Private (venture-backed)
Industry Mobile and email applications
Founded 2006
Headquarters San Francisco, California, U.S.
Key people Jeff Bonforte, CEO
Adam M. Smith, Co-Founder
Matt Brezina, Co-Founder
Website www.xobni.com

Xobni (inbox spelled backwards; pronounced /ˈzɒbni/ ZOB-nee)[1] was a San Francisco-based company that made software applications and services including products for Microsoft Outlook and mobile devices. It was founded in March 2006 by Adam Smith and Matt Brezina from Adam's dorm room in Cambridge, Massachusetts as part of the Y Combinator summer founder's program. In late 2006, it relocated to San Francisco to be closer to Silicon Valley.[2]


Xobni's first product, was announced for private beta testing on September 18, 2007, at the TechCrunch 40 conference. It offered search and people-based navigation of Microsoft Outlook email archives. The company hinted at plans to offer the same functionality for other email clients.[3] When the Outlook product was first launched, it was called Xobni Insight, and was soon changed to Xobni for Outlook, or simply Xobni.

Xobni received mostly positive coverage,[4][5][6] although initial versions had performance problems on large inboxes.[7] Many users find that the preinstalled version of Xobni (and possibly the manually installed equivalent) cannot be removed.[8] Some anti-virus software has also flagged Xobni as malware.[9]

In February 2008, Xobni hired Jeff Bonforte, a vice president at Yahoo! and founder of defunct I-drive, as their CEO.[10] In the same month, Bill Gates gave a demo of Xobni at the Office Developers' Conference.[11] This led to rumors of a US$20 million acquisition by Microsoft, which the company reportedly rejected.[12]

The company opened its beta to the public on May 5, 2008,[13] and garnered coverage from blogs such as The Wall Street Journal,[14] The New York Times,[13] CNET[15] Businessweek,[16] CIO Magazine,[17] and TechCrunch.[18]

On July 3, 2013, Xobni announced it had been acquired by Yahoo for an undisclosed sum.[19][20]


While the product was in beta, some questioned how Xobni planned to make money and the scope of their products.[21] In July 2009 Xobni released a paid version of its product called Xobni Plus. Xobni Plus included advanced search, appointment search, the ability to search multiple PST archives, no ads, and one year support.[22] In 2010, the company added more revenue-generating products, including a service to share Xobni data across multiple devices, and gadgets that bring third party data into Outlook. The company promoted an enterprise business to sell directly and through reseller partnerships; as well as a platform for developers to create gadgets to run within Xobni's sidebar in Outlook. Xobni announced localized versions of their Outlook product (free and paid) for French and German markets in 2010. It announced its first for BlackBerry users in March 2010.[23]

In September 2011, Xobni announced Smartr Inbox for Gmail and Smartr Contacts for Android.

Smartr Contacts is a free app for the Android phone. Contacts are searchable and ranked by importance, not alphabetically. Each profile has a photo, job title, company details, email history, common contacts and info from social networks. The app can be accessed on a phone home screen, via the main search bar, the widgets, or through the Smartr Contacts app. Lifehacker called Smartr Contacts for Android the "Best Address Book for the Android".[24]

On January 24, 2012, Smartr Contacts for iPhone was released. Like Smartr Contacts for Android, a blog called it a magic address book.[25] The app identifies name and contact information for all contacts, including communication history and updates from Facebook, LinkedIn and Twitter. Lifehacker called Smartr Contacts for iPhone the "Best Address Book for iPhone".[26]


In March 2007, Xobni raised US$4.26 million[27] from Vinod Khosla, First Round Capital, and Atomico, along with a number of angel investors including Ron Conway.[28] In January, 2009, Xobni announced a $7 million B round of financing that added Cisco Systems and BlackBerry Partners Fund. The website CrunchBase also shows an additional $16.2 million investment in Xobni (April 2010) led by new investor RRE Ventures and Khosla Ventures, with participation from Baseline Ventures, Atomico Ventures, FirstRound Capital, BlackBerry Partners Fund, and Cisco. On February 27, 2012 another round of about $10 million was announced.[29]


The initial releases of Xobni were criticized by tech bloggers and other journalists for stability and performance problems, as documented on the company's community forum.[30][31] Other reviewers have criticized Xobni for monopolizing system resources,[32] disabling other standard Outlook functionality like calendar appointments,[33] and also deleting Outlook archives.[34] Users have reported that these issues persist even in production (non-beta) versions.[33] Some speculate these difficulties derive from engineering CPU and I/O intensive indexing on the closed source Microsoft Outlook platform, which has an extensive and heterogeneous deployment space with thousands of parameters to test. In 2008, blogger Om Malik wrote that the company would have to "raise gobs of additional money to fine-tune its product."[35]

Since the initial release, the company received higher marks for the product's performance.[36] Product reviews from CNET (5 stars)[37] and PC Magazine (Editor's Choice)[38] have expressed significantly improved performance and reliability with the Xobni for Outlook product. "Unlike many other Outlook add-ons, both free and upgraded versions of Xobni add functionality without greatly dragging down Outlook's performance." (CNET, 4/15/10)

With the release of the paid Xobni Plus product as of Xobni's 1.8 release, Xobni withdrew from its free version the capability to index multiple Outlook PST archives. Existing users still received this functionality in the free version. This led to some consternation among users of the free product.[39]


  1. ^ Xobni FAQ
  2. ^ Mass High Tech: Fear, greed or comfort: What makes (Boston) VCs invest?
  3. ^ TechCrunch 40: Productivity & Web Apps - Panel Video TechCrunch 40
  4. ^ Email Company Xobni Launches, may Steal TechCrunch Prize VentureBeat
  5. ^ Xobni - A New Look for Outlook Technology Review
  6. ^ Reinventing the Inbox Newsweek
  7. ^ Xobni Blog: Improving performance
  8. ^ http://community.xobni.com/xobni/topics/help_please_how_can_i_delete_xobni_no_offence_to_xobni?from_gsfn=true
  9. ^ Xobni Community on Malware
  10. ^ Xobni Blog: Jeff Bonforte Joins Xobni as CEO
  11. ^ Gabor Cselle: Bill Gates demos Xobni
  12. ^ TechCrunch: Microsoft may buy Email Startup Xobni TechCrunch
  13. ^ a b Brad Stone (May 5, 2008). "If You Use Outlook E-mail, Meet Xobni". The New York Times. Retrieved September 7, 2013. 
  14. ^ Walter S. Mossberg (July 31, 2008). "Xobni Can Make Good Old Email More Useful". Wall Street Journal online. Retrieved September 7, 2013. 
  15. ^ CNET: Personal services get business flavor: Xobni and SugarSync
  16. ^ Businessweek: Will Xobni Help BlackBerry take on the iPhone
  17. ^ CIO: Mobile Contact Management Redefined
  18. ^ TechCrunch: Microsoft Outlook is Starting to Look Like a Poor Man's Xobni
  19. ^ Ryan Lawler (July 3, 2013). "Xobni Was Acquired For More Than $60 Million". TechCrunch. Retrieved September 7, 2013. 
  20. ^ Kara Swisher (July 3, 2013). "Yahoo Acquires Xobni for Upward of $30 Million". All Things D. Retrieved September 7, 2013. 
  21. ^ Rafe Needleman: Xobni makes Outlook better, but where's the business?
  22. ^ https://www.xobni.com/buy-xobni
  23. ^ Katherine Boehret (March 16, 2010). "An App with a Knack for Contacts". Wall Street Journal online. Retrieved September 7, 2013. 
  24. ^ Lifehacker: Best Address Book for the Android
  25. ^ Jordan Minor (January 26, 2012). "Smartr Contacts is a Magic Address Book". Retrieved September 7, 2013. 
  26. ^ Best Address Book for iPhone
  27. ^ Om Malik: Can Xobni cure Outlook’s ills? GigaOM
  28. ^ Xobni Blog: List of investors
  29. ^ Leena Rao (February 27, 2012). "Social Email Contact Manager Xobni Raises $10 Million From ‘Commercial’ Partner". Tech Crunch. Retrieved September 7, 2013. 
  30. ^ http://www.xobni.com/community/showthread.php?t=131
  31. ^ http://www.xobni.com/community/showthread.php?t=701
  32. ^ http://www.centernetworks.com/xobni-office-setup-and-ram-sucker
  33. ^ a b http://www.xobni.com/community/showpost.php?p=7871&postcount=14
  34. ^ http://www.xobni.com/community/showthread.php?t=1838
  35. ^ http://gigaom.com/2008/04/20/for-xobni-why-it-is-good-time-to-sell/
  36. ^ Xobni drops beta, organizes your outlook info faster
  37. ^ http://download.cnet.com/Xobni/3000-2369_4-10839523.html?tag=mncol
  38. ^ Costa, Dan. "Xobni". PC Magazine. 
  39. ^ http://community.xobni.com/xobni/topics/uninstalled_xobni_because_of_new_version_limitations?from_gsfn=true

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