Palo Alto has seen three startup acquisitions over the past two weeks, and the collective cost of the buys may be over $120 million.
Apple reportedly bought WiFiSlam, a Palo Alto-based indoor-GPS company for $20 million, according to a report by the Wall Street Journal. The company, whose founders are Stanford students, also uses Stanford's incubator, StartX.
Two of its founders, Darin Tay and Joseph Huang, are ex-Googlers -- Tay was an engineer and Huang was an intern. Its backers include Boingo co-founder Skye and Angelist co-founder Naval Ravikant, according to its AngelList profile. The company allows mobile phone GPS systems to work accurately indoors.
Last week Dropbox acquired Orchestra, the makers of the popular iPhone email app, Mailbox, for as much as $100 million, according to Techcrunch.
Orchestra, which has 1.3 million people on reservation for its app, cited its desire for rapid growth as a factor in the sale.
"The product (Mailbox) needs to grow fast, and we believe joining Dropbox is the best way to make that happen," the company's website states.
The app has been in the Apple App Store for only a month. It currently processes 60 million emails per day, according to its website.
Orchestra was founded in 2011 and has received $5 million in Series A funding in November 2011 from Charles River Ventures, SV Angel, Kapor Capital and CrunchFund, according to the company's Crunchbase profile.
Also, Palo Alto-based TripAdvisor bought Tiny Post for an undisclosed amount of money.
Tiny Post is an app that allows users to write over photos and turn them into stories.
"The Tiny Post team have created a wonderful app that shows the possibilities of combining travel photos with social and mobile," said Steve Kaufer, co-founder and CEO TripAdvisor, Inc. "We think Tiny Post is a great fit with our continued drive to provide engaging and sharable content and I am happy to welcome this strong team to TripAdvisor."