Back to Mobile View
Subscribe to the CrunchBase Daily for the latest on Fundings, Acquisitions, and Startup Events


Acquired byComcast

General Information


1050 Enterprise Way, 5th floor
Sunnyvale, CA, 94089


VP Business Development
President & CEO
VP Globalization, IT, Customer Support, and Privacy


TOTAL $28.3M
Series A, 11/2002
Sequoia Capital
SV Angel
Series B, 7/2003
Sequoia Capital
Harbinger Ventures
Globespan Capital Partners
Series C, 4/2004
Sequoia Capital
Globespan Capital Partners
Series D, 2/2007
DAG Ventures




Plaxo helps keep people connected by solving the common and frustrating problem of out-of-date contact information. Users and their contacts store their information on Plaxo’s servers. When a user edits their own information, the changes appear in the address books of all those who listed the user in their own address books. Because contacts are stored in a central location, it’s possible to list connections between contacts and access the address book from anywhere.

Napster co-founder, Sean Parker, was one of Plaxo’s founders

Recent Milestones

  • Check
    Plaxo — Plaxo lines up new leadership team including promotions (Capili, Erchinger) and new hires Javarappa, and Smalley. (5/17/11)
    Posted 5/18/11 at 5:26pm via
  • Check
    Plaxo — Plaxo returns to its address book roots and introduces the Plaxo Personal Assistant. (3/16/11)
    Posted 5/18/11 at 7:00pm via
  • Check
    Plaxo added Preston Smalley as GM and Sr. Director, Product. (5/1/10)
    Posted 10/21/10 at 9:19am
  • Check
    Plaxo — Long-Time Plaxo CEO Golub Leaves (3/25/10)
    Posted 3/28/10 at 4:39pm via
  • Check
    Plaxo added Justin Miller as President & CEO. (3/1/10)
    Posted 3/25/10 at 10:48am
  • Handshake
    Plaxo was acquired by Comcast for $150M. (5/14/08)
    Posted 5/14/08 at 2:46pm via
  • Check
    Plaxo added Jon Sonnenschein as Director, Product Management. (1/1/08)
    Posted 6/11/09 at 8:26am
  • Check
    Plaxo added Ryan King as Board. (5/31/07)
    Posted 6/9/07 at 6:21am
  • Dollar
    Plaxo received $9M in Series D funding. (2/1/07)
    Posted 6/13/07 at 1:33am
  • Check
    Plaxo added Garret Heaton as Engineer. (5/10/06)
    Posted 3/15/13 at 6:02pm
  • Dollar
    Plaxo received $7M in Series C funding. (4/1/04)
    Posted 6/13/07 at 1:33am via
  • Dollar
    Plaxo received $8.5M in Series B funding. (7/1/03)
    Posted 6/13/07 at 1:32am via
  • Dollar
    Plaxo received $3.8M in Series A funding. (11/1/02)
    Posted 6/9/07 at 6:32am via
  • Check
    Plaxo added Jon Callaghan as Board.
    Posted 7/22/08 at 4:56pm
  • Check
    Plaxo added Venkates Swaminathan as Board.
    Posted 6/9/07 at 6:23am
  • Check
    Plaxo added Ben Golub as Board.
    Posted 6/9/07 at 6:20am



About Plaxo - In 60 seconds

Added: 3/21/11

Techcrunch Interview of CEO - April 2010

Added: 3/21/11


Plaxo screenshot
Above: New User Homepage - March 2011
Uploaded: 3/22/11
Plaxo screenshot
Above: Management Tools - March 2011
Uploaded: 3/22/11
Plaxo screenshot
Above: Homepage - Personalized
Uploaded: 5/19/11


Plaxo Basic
Launch DateApril 1, 2003
Tags wiki
Plaxo screenshot
Plaxo Basic Plaxo Basic Plaxo Basic
Plaxo Basic

Plaxo Personal Assistant

Add some content to this product

Plaxo Pulse
Launch DateAugust, 2007
Closed DateMay 18, 2010
Tags aggregator

Plaxo Pulse is Plaxo’s foray into social networking, building a social network around third-party data. Pulse allows users to stay connected to their friends’ content updates across different social networks and platforms. Compatible with a number of networks like MySpace, Twitter,, Digg, Flickr, and Yelp, users receive updates in a feed, and can easily keep tabs on friends from one location.

Plaxo screenshot
Above: Plaxo Pulse Screenshot -- #1
Uploaded: 2/5/08

Traffic Analytics






  1. Confirmed: Comcast Bought Plaxo, Deal Closed Today ( [edit]
  2. Plaxo Press Release - 2/18/2003 ( [edit]
  3. Plaxo Press Release - 7/28/2003 ( [edit]
  4. Plaxo connects to more funding ( [edit]
  5. EDGAR [edit]
  6. Long-Time Plaxo CEO Golub Leaves ( [edit]
    Plaxo Lines Up Leadership Team in Business Strategy, Engineering, Operations & Customer Service to Execute on World’s Most Powerful Address Book ( [edit]
    Plaxo Returns to Its Address Book Roots, Offers the Most Intelligent Address Book for Your Connected Life ( [edit]
Edit This Page
Last Edited 4/3/14

Revision History RSS Picture


Share this page on Twitter or Facebook:
Or copy this code to embed a widget: customize »

TechCrunch Posts TechCrunch Logo Small Picture

Techmeme Posts Techmeme Logo Small Picture

External Links

CrunchBase API


Become a Sponsor
Terms of Service | Privacy Policy | Licensing Policy