When was Whistle founded?

Whistle was founded in 2012 and raised its 1st funding round 1 year after it was founded.

Where is Whistle located?

Whistle is headquartered in San Francisco, United States. It is registered at 17620 MOUNT HERRMANN STREET, FOUNTAIN VALLEY, CA 92708.

How many employees does Whistle have?

As of May 31, 2026, the latest employee count at Whistle is 20.

Is Whistle an acquired company?

Whistle got acquired by undefined on Jul 28, 2025.

Is Whistle a funded company?

Whistle is a funded company, having raised a total of $21M across 2 funding rounds to date. The company's 1st funding round was a $***** Series A round, raised on Jun 05, 2013.

How much is Whistle worth?

The last known valuation of Whistle was $***** as of Mar 31, 2016.

When was the latest funding round of Whistle?

Whistle's latest funding was a $***** Series B round on Jan 30, 2015, with participation from 5 investors. Its primary sector is Wearable Technology. In United States, the Wearable Technology sector has seen $1.21B in funding in 2026 to date.

Where does Whistle rank among its competitors?

Whistle ranks 3rd amongst 30 active competitors, of which 9 are funded. It stands 2nd in terms of total funding among its competitors. The most recent competitor to raise funding was Halo, which secured an undisclosed amount in Nov, 2023.

Who are the top competitors of Whistle?

Whistle's top competitors include Fi, Halo and SpotOn. Among them, Halo secured the most recent funding round in November, 2023.

Whistle - 2026 Company Profile, Funding & Competitors

Company Details

Whistle is a private label brand of tracking devices for dogs. Its intelligent monitoring system features a wireless device that attaches directly to a dog’s collar and a mobile app that allows pet owners to know when their dog is walking, playing, or resting. It also helps to monitor fitness & nutrition, health monitoring, location tracking, and more. The company offers free shipping and one year warranty on the products.

Website: whistle.com
Social
Email ID: *****@whistle.com
Phone Number: +1 **********
Registered Address: 17620 MOUNT HERRMANN STREET, FOUNTAIN VALLEY, CA 92708

Key Metrics

Founded Year

2012

Location

San Francisco, United States

Stage

Acquired

Total Funding

$21M in 2 rounds

Latest Funding Round

Series B, Jan 30, 2015, $*****

Last Known Valuation

$***** as on Mar 31, 2016

Investors

Qualcomm & 12 more

Ranked

3^rd among 30 active competitors

Employee Count

20 as on May 31, 2026

Investment & Acquisitions

Tagg

Similar Companies

Fi & 108 more

Exit Details

Acquired

View Whistle's full profile

Whistle is associated with 1 legal entity given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
ANTECH DIAGNOSTICS, INC. CIN: 524131 , United States, Active	Jun 03, 2016	-	-	-

Whistle got acquired by on Jul 28, 2025.

Click here to take a look at Whistle's acquisition in detail

Whistle has raised a total funding of $21M over 2 rounds. Its first funding round was on Jun 05, 2013. Its latest funding round was a Series B round on Jan 30, 2015 for $*****. 5 investors participated in its latest round. Whistle has 13 institutional investors.

Here is the list of recent funding rounds of Whistle:

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Jan 30, 2015	5294574	Series B	5571597	9105889	2761684	6462467
Jun 05, 2013	3083492	Series A	4996383	6252215	2607438	DCM Ventures & 2 more

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View details of Whistle's funding rounds and investors

Whistle's employee count trend

Whistle has 20 employees as of May 26. Here is Whistle's employee count trend over the years:

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Top competitors of Whistle include Fi, Halo and SpotOn. Here is the list of Top 10 competitors of Whistle, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Fi 2017, New York City (United States), Series B	Provider of a smart GPS tracker and activity monitoring solutions for dogs	$40M	RRE Ventures, Lerer Hippeau & 16 others	67/100
2nd	Halo 2017, Plano (United States), Series B	Brand of pet collars	-	Softeq, Chicago Atlantic	57/100
3rd	Whistle 2012, San Francisco (United States), Acquired	Private label brand of tracking devices for dogs	$21M	Bayrock, Edelweiss Ventures & 11 others	50/100
4th	SpotOn 2015, Bedford (United States), Unfunded	Manufacturer of GPS dog fence systems and related subscription services	-	-	46/100
5th	Felcana 2015, London (United Kingdom), Seed	Internet first brand offering monitoring devices for cats and dogs	$4.06M	Global Ventures Partners, Seedrs & 2 others	43/100
6th	Wagz 2015, Hampton Falls (United States), Series A	Private label brand of smart products for pets	$8.23M	Softeq, MedScience Ventures & 1 others	41/100
7th	Invisible Fence 1973, Tennessee (United States), Acquired	Provider of electronic pet containment systems and training services	-	-	39/100
8th	Dogtra 2010, Torrance (United States), Unfunded	Manufacturer of smart training collars for dogs	-	-	37/100
9th	Pawscout 2014, San Francisco (United States), Seed	Private label brand of Bluetooth-enabled pet tags	$3M	Leadout Capital	33/100
10th	GPC Smart 2020, New York City (United States), Unfunded	Provider of a pet recovery system using smart tags and a mobile app	-	-	32/100