- Headquarters
- San Francisco, California
- Employees
- 51–200
- Founded
- 2012
- Business Model
- B2C
- Website
- whistle.com
- Total Funding
- $21.0M
- Last Round
- $6.0M Series AJan 2015
- Rounds
- 2
- Acquisition Date
- Jan 2016
About
Whistle developed GPS-enabled activity monitors and health trackers for dogs and cats, providing real-time location tracking and wellness insights via a subscription mobile app. Founded in 2012 in San Francisco, the company was acquired by Mars Petcare in 2016 and subsequently by Tractive in 2025.
Summary
Whistle is an IoT company based in San Francisco, United States, founded in 2012. It has raised $21.0M in total across 2 rounds, most recently a $6.0M Series A round in Jan 2015. Investors include DCM Ventures, Alumni Ventures and Mars Petcare.
Tech & App Stack
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Funding History
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Jan 2016
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Series A through Acquisition — per-round amounts, valuations, and who invested in each round.
Investors
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