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Whistle is a technology company that creates smart devices and GPS trackers to help pet parents deliver personalized, preventative care for their pets. Their products include GPS collars and health…

Whistle is a technology company that creates smart devices and GPS trackers to help pet parents deliver personalized, preventative care for their pets. Their products include GPS collars and health…
Core product: GPS and health/activity trackers plus companion mobile app for pets
Founded: 2012
Acquisitions/ownership: Acquired by Mars Petcare (2016); later joined Tractive (announced 2025)
Reported funding: Approximately $21M total prior to acquisition
Pet health monitoring, activity tracking, location/GPS tracking, preventative veterinary insights
2012
Pet technology / pet wearables
6000000
Reported Series A of $6M (June 2013)
15000000
Reported Series B of $15M (Jan 2015); participants included Qualcomm Ventures, Melo7 Tech Partners and Queensbridge
Acquired by Mars Petcare in March 2016
Joined Tractive family (announced July 28, 2025)
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