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Xobni

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A smart product suite that creates complete and searchable social profiles of a user's contacts

San Francisco, United StatesFounded 2006Other B2B Software
Valuation $0–100M Latest valuation · 2012
Headcount <100 Current team size
Total funding $10–50M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Xobni and the history behind them.

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.

Source: Dealroom company data

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.

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Funding history

9 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
ACQUISITIONExit Jul 2013 $48M Yahoo!
SERIES DEquity / VC Feb 2012 $10M $40M Nuance Communications
Showing the latest 2 of 9 recorded eventsBook a demo for the full funding history →

Growth signals

Xobni website traffic

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.

Latest monthly visits950 3-month web change-90.1% 1-year team growth0%
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Similar companies

Closest operating peers by Dealroom taxonomy

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Investors

16 investors on the cap table

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

Series B and later2 investors entered at this stage

Other known investors1 additional known investor

  • Yahoo!
Team profiled 26 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 5 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Global footprint

Workforce and web traffic by country
Workforce by country
1 countries with
team presence
🇺🇸 United States100%
1 country shown

Market sentiment

Posts on X, past 7 days

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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