Come join us at Yammer's Happy Hacksgiving - a 24 -hour competition dedicated to building innovative enterprise applications on the Yammer Platform!

This is your chance to compete with some of the best developers in the enterprise space. We'll provide a beautiful working space and plenty of snacks, drinks, and coffee.  All you need to bring are your skills and creative ideas.



Yammer HQ, 1355 Market St. 3rd Floor San Francisco, CA 94103

Register at


Saturday, November 16th:

  • 11am Welcome & API Stand Ups
  • 12pm Hacking Begins!
  • 1pm Lunch is served
  • 6:30pm Dinner is served
  • 10pm Midnight Snack
  • 12am End (Yammer closed overnight) 

Sunday, November 17th:

  • 9am Doors Open 
  • 10:30am Hack Submissions Due
  • 11am Presentations begin
  • 1pm Awards, Celebration, & Send-off

Note: We will be hosting a canned food drive in honor of our Hacksgiving theme.  We are requesting that attendees bring in can(s) to be donated to the local food bank for the holiday season.  Thank you!


  • Participants: Will need to provide identification upon request.
  • Teams: There are no limit on team sizes, teams cannot consist of all Yammer/Microsoft employees. Yammer/Microsoft employees can only use publicly facing API's and may not use internal resources not available to the public.
  • Countries: Must reside in United States and be able to attend Hackathon in person.


  • Submissions must have some type of integration with the Yammer Platform. (Yammer Connect, Yammer Rest API's, or Yammer SDK's)
  • Teams must register for a challengepost account and submit their hacks through challengepost.
  • Teams must present their submission in person (3 minute timeframe) during judging to qualify for prizes.
  • A link to working source code must be provided if requested.

Hackathon Sponsors


$6,000 in prizes

First Place:

Second Place:

Hacker's Choice Award:

Nokia Lumia 920 and a Jawbone Jambox

Most Creative:

Nokia Lumia 920 and Jawbone Jambox

Most Useful:

Nokia Lumia 920 and Jawbone Jambox

Devpost Achievements

Submitting to this hackathon could earn you:


Pavan Tapadia

Pavan Tapadia
Yammer, Chief Product Officer

Ravi Belani

Ravi Belani
Alchemist Accelerator, Managing Director

Joseph Floyd

Joseph Floyd
Emergence Capital

Conrad Shang

Conrad Shang
Northwest Venture Partners

Judging Criteria

  • Integration
    How well does the application leverage the Yammer API?
  • Utility
    How well does the application solve a real problem for end-users?
  • User Experience
    How easy is the application to use?

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