|Alma mater||Stanford University|
|Home town||Baltimore, MD|
Jeff Seibert (born July 27, 1985) is an American entrepreneur and angel investor. He is best known for co-founding Crashlytics, which in a little over a year was acquired by Twitter for over $100 million in 2013 (later valued at $259.5 million at Twitter's IPO), and co-founding Increo, which was acquired by Box in 2009. 
Seibert grew up in Baltimore, Maryland. He discovered technology at a young age. He taught himself C in 6th grade and went on to write a range of Macintosh shareware applications. At the age of 13, Jeff released his first application, Histogram, a specialized graphing program for Mac OS. During high school, in 2002, Seibert went on to release EVONE, a graphical editor for the computer game Escape Velocity by Ambrosia Software.
Seibert attended Gilman School in Baltimore, graduating in 2004.
Seibert enrolled as an undergraduate degree student at Stanford University. He majored in Computer Science. At Stanford, Jeff was a Vice President of BASES where he led the Entrepreneurial Thought Leaders series from 2005 to 2008. In 2007, Seibert was selected as a Mayfield Fellow where he studied under Tom Byers and Tina Seelig. Seibert received a B.S. in Computer Science from Stanford University in 2008.
In 2014, Seibert led the team that created Fabric, Twitter's mobile developer platform. It launched in October 2014 and as of 2016 is used by over 225,000 developers and installed on over 2 Billion mobile devices.
In September 2015, Twitter announced that it promoted Seibert to oversee Twitter's core product.  Nine months later, Seibert returned to his previous role on the Fabric team. On January 18th 2017, Seibert announced Fabric's sale to Google and his plans to step back from his role on the Fabric team. 
- Gregory Huang (2013-02-05). "Twitter's Boston Acquisitions: Crashlytics Tops $100M, Bluefin Labs Close Behind". Xconomy.
- Drew Olanoff (2013-01-28). "Twitter Acquires Mobile Crash-Reporting Tool Crashlytics, Development Of The Product Will Continue "Unabated"". TechCrunch.
- "Arios Software History".
- "Twitter Fabric now installed on 2 billion active devices". VentureBeat. Retrieved 2016-12-18.
- Kurt Wagner (2015-09-02). "Twitter Restructures Product Team, Promotes Jeff Seibert". recode.
- "Twitter is replacing its head of product. Again". Recode. Retrieved 2018-04-08.
- "Jeff Seibert on Twitter". Twitter. Retrieved 2018-04-08.