Whistle Labs makes the most popular GPS dog tracker on the market. In 2016, the company was acquired by Mars Petcare for $116 million.
Whistle currently comes in three versions:
- Whistle Go – health and GPS location tracker
- Whistle Go Explore – same as the GO, but with a longer battery life and a night light
- Whistle Fit – health and fitness tracker, without GPS tracker
In 2020, Whistle indicated that revenue growth has consistently been in the double-digits since the company started.