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Xobni
A smart product suite that creates complete and searchable social profiles of a user's contacts
About Xobni
Xobni, a name derived from spelling "inbox" backward, was a software company focused on enhancing email and contact management. The firm was established in March 2006 by Adam Smith and Matt Brezina, who started the venture from a dorm room in Cambridge, Massachusetts, as part of the Y Combinator summer program. The company later moved its headquarters to San Francisco to be closer to Silicon Valley.
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The core of Xobni's business was to create applications that automatically discover and compile comprehensive profiles for every contact a user has interacted with via email, calls, or SMS. Its initial product, launched in 2007, was a plugin for Microsoft Outlook designed to improve search and provide people-centric navigation of email archives. This tool indexed Outlook data, presenting emails as threaded conversations, organizing file attachments, and extracting useful information like phone numbers. The service automatically created rich profiles for each contact, including their photo, job title, company details, communication history, and social media updates from platforms like LinkedIn, Facebook, and Twitter. The business model operated on a freemium basis; a basic version was free, while a paid version, Xobni Plus, offered advanced features like searching multiple email archives and no advertisements. Revenue was also generated through enterprise sales and a platform for third-party developers.
Over time, Xobni expanded its product line, introducing the Smartr brand for its Gmail, Android, and iPhone applications, as well as versions for BlackBerry. Its Android app was particularly well-received, being named "Best Address Book for the Android" by Lifehacker. The company attracted significant investment from firms such as Khosla Ventures, First Round Capital, and Atomico. In February 2008, after a demo by Bill Gates at an Office Developers' Conference, Microsoft reportedly entered into acquisition talks, but a deal was never finalized. Ultimately, in July 2013, Yahoo acquired Xobni for a sum reported to be over $60 million. The intention was to integrate Xobni's technology into various Yahoo products, particularly Yahoo Mail. However, just one year after the acquisition, in July 2014, Yahoo shut down Xobni's services as part of a broader strategy to refocus on its core experiences.
At a glance
- Status
- Acquired
- Founded
- 2006
- Headquarters
- San Francisco, United States
- Employees
- 27
- Open positions
- None listed
- Dealroom signal
- 57.3/100
- Industry
- Telecom, Enterprise Software
- Sector
- Other B2B Software, Immersive Technologies, Hard Tech, YC S06
- Technology
- Virtual Reality
- Business model
- SaaS
- Client focus
- b2b, b2c
Latest news
Press, funding announcements and product moves mentioning Xobni.
Funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| ACQUISITION✓Exit | Jul 2013 | $48M | — | Yahoo! | — |
| SERIES D✓Equity / VC | Feb 2012 | $10M | $40M | Nuance Communications | — |
Growth signals
Latest recorded traffic for Xobni is 950 monthly website visits, down 90.1% over the last three months. Xobni's team grew 0% over the past year.
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Investors
From Dealroom's funding and investor records, grouped by the round each investor first entered.
Seed1 investor entered at this stage
Series A12 investors entered at this stage
Khosla Ventures
Atomico
Ariel Poler
Saar Gur
Tom Pinckney
SV Angel
First Round Capital
Cisco
Relay Ventures
RBC Venture Partners
Baseline Ventures
Blackberry Partners Fund
Series B and later2 investors entered at this stage
RRE Ventures
Nuance Communications
Other known investors1 additional known investor
Yahoo!
Source: Dealroom Talent Intelligence.
Global footprint
team presence
Market sentiment
An AI-synthesised read of the highest-engagement posts about Xobni on X, ranked by likes and reposts, corporate channels excluded.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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