About Whistle
Whistle is a Consumer company based in San Francisco (United States) founded in 2012, and was acquired by Tractive in July 2025. Private label brand of tracking devices for dogs. It operates in the Consumer and Technology sectors. Whistle has raised $21 million across 2 funding rounds from investors including Qualcomm, Tractive and Mars. Whistle has completed 1 acquisition, including PetTracker. Whistle offers products and services including Whistle Switch, Go Explore 2.0, and Health 2.0. Its focus areas include High Tech, Wearable Technology, Pet Wearables and Cat and Dog Monitoring. Its legal entity is ANTECH DIAGNOSTICS, INC. Its competitors include Fi, Wagz and Invisible Fence; 2 of its 3 listed competitors have raised funding.
Company details
Founded in 2012 and based in San Francisco, United States, Whistle operates in the pet technology sector. Private label tracking devices for dogs are produced, featuring a wireless collar attachment and a companion mobile app. Activities such as walking, playing, and resting are monitored, along with fitness, nutrition, health, and location data. Free shipping is provided, and products are covered by a one-year warranty.
- Total Equity Funding$21M (USD)
in 2 rounds
- Latest Funding Round$15M (USD), Series B
Jan 2015
- InvestorsQualcomm
& 7 more
- Investments & Acquisitions
- Acquired by
Products & Services of Whistle
Whistle offers a comprehensive portfolio of products and services, including Whistle Switch, Go Explore 2.0, and Health 2.0.
Smart collar for location tracking and health monitoring of pets.
Device for monitoring pet activity, wellness, and location updates.
App-based tool for tracking pet behavior and providing health insights.
Apps and channels of Whistle
Whistle publishes 2 mobile apps with over 5K+ downloads; its YouTube channel Whistle has 1.72K subscribers and 30 videos.
Videos from Whistle
The most watched videos on Whistle's YouTube channel, Whistle (1.72K subscribers). Click a video to play it here.
More on Whistle.
Funding Insights of Whistle
Whistle has successfully raised a total of $21M across 2 strategic funding rounds. The most recent funding activity was a Series B round of $15 million completed in January 2015. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $21M
- Total Rounds 2
- Last Round Series B — $15M
- First Round $6M
(Jun 2013)
- Investors Count 6
All 2 funding rounds of Whistle with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Jan 2015 | $15M | Series B | – | NGP Capital, Qualcomm | |
| Jun 2013 | $6M | Series A | – | – |
8 investors in total: 8 institutional.
Investors in Whistle
Whistle has secured backing from 8 investors, including venture fund and institutional investors. Prominent investors backing the company include Qualcomm, Tractive and Mars.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Venture capital firm focused on B2B companies | ngpcap.com | Palo Alto, United States | ||
Tech-focused seed, early, and mid-stage VC investments are made globally. | dcm.com | Menlo Park, United States | ||
Tech-focused Early-stage centric VC Firm investing primarily in the US | slowventures.com | San Francisco, United States | ||
US focused VC firm | qbvp.com | Los Angeles, United States | ||
Tech focused VC firm investing in early stage companies in the US | redswan.vc | New York, United States | ||
Provider of cloud and AI-based cellular communication ICs | 1985 | qualcomm.com | San Diego, United States | |
Grains, legumes, snacks, pet care, and confectionery products are produced. | 1911 | mars.com | Mclean, United States | |
Wearable GPS devices for pet tracking are offered by Tractive. | 2012 | tractive.com | Pasching, Austria |
Investor details for Whistle
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People of Whistle
6 people are tracked at Whistle (2 in leadership, 4 in team).
| Name | Role | Group |
|---|---|---|
David Zeff | Chief Executive Officer | Leadership |
Laura Nguyen | Director Of Engineering | Leadership |
Colin Payne | Customer Experience Lead | Team |
Mohamed Nabil | Senior Software Engineer | Team |
Luciano P. A. | Senior Software Engineer | Team |
André Rohde | Senior Lead Software Engineer | Team |
Complete people profiles for Whistle
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Investments & Acquisitions by Whistle
Whistle has strategically engaged in corporate development activities, having acquired 1 company. Notable acquisitions include PetTracker.
| Company Name | Description | Domain | Location | Founded | Acquired | Amount |
|---|---|---|---|---|---|---|
GPS tracking devices for pets are developed and monitored remotely. | pettracker.com | San Diego, United States | 2010 | Jan 2015 | •••• |
Complete acquisition details for Whistle
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Timeline of Whistle
6 dated milestones of Whistle across 13 years, from founding to its latest funding, stage changes and deals.
- Founded Whistle is founded.
- Funding First funding round of $6.0M.
- Acquisition Acquires PetTracker.
- Funding Latest funding round, Series B, of $15.0M.
- Exit Acquired by Mars.
- Exit Acquired by Tractive.
Competitors of Whistle
Whistle has 3 listed competitors in our database, 2 of them funded. They include Fi, Wagz and Invisible Fence.
| Company Name | Domain | Founded | HQ Location | Total funding | Employees | Description |
|---|---|---|---|---|---|---|
| tryfi.com | 2017 | New York, United States | $40M | Smart GPS trackers and activity monitors for dogs are offered. | ||
| wagz.com | 2015 | Hampton Falls, United States | $8.23M | Smart GPS collars for pets with video streaming are offered. | ||
| invisiblefence.com | 1973 | Tennessee, United States | 911 | Electronic pet containment systems and training services are provided. |
Detailed competitors of Whistle
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Web traffic of Whistle
Websites that share an audience with Whistle (whistle.com).
Websites whose visitors overlap most with Whistle. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
| fitbark.com | 100% | 47.2K | #590,386 | View details | |
| petreleaf.com | 82% | 27.8K | #718,957 | View details | |
| honestpaws.com | 77% | View details | |||
dogmaster.com.au | dogmaster.com.au | 75% | #2,553,087 | – | |
| westpaw.com | 74% | 41.4K | #605,134 | View details | |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
All 25 similar websites and full traffic analytics for Whistle
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- 25 similar websites
- Audience overlap
- Engagement analytics
- Traffic by brand
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Top companies in Pet & Animal Care Platforms
3 companies that operate in the same segment as Whistle (Pet & Animal Care Platforms) in United States, ranked by their profile score on The Company Check.
| Company | Description | Founded | Location | Total funding | Revenue | Employees |
|---|---|---|---|---|---|---|
App-based pet sitting marketplace | 2011 | Olympia, Washington, United States | USD 409.19 M | |||
Online subscription platform offering dog supplies | 2011 | New York, New York, United States | USD 83.01 M | 686 | ||
Fresh, human-grade dog food is delivered through subscription plans. | 2015 | New York, New York, United States | USD 67.65 M |
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Related news about Whistle
Complete news archive for Whistle
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Frequently Asked Questions about Whistle
Whistle was founded in 2012 and raised its 1st funding round 1 year after it was founded.
Whistle is headquartered in San Francisco, United States. It is registered at San Francisco, California, United States.
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 of $6M, raised on Jun 2013.
Founded in 2012 and based in San Francisco, United States, Whistle operates in the pet technology sector. Private label tracking devices for dogs are produced, featuring a wireless collar attachment and a companion mobile app. Activities such as walking, playing, and resting are monitored, along with fitness, nutrition, health, and location data. Free shipping is provided, and products are covered by a one-year warranty.
Whistle's top competitors include Fi, Invisible Fence and Wagz.
Whistle offers Whistle Switch, Go Explore 2.0, and Health 2.0.
Whistle has made 1 acquisition, including PetTracker.
Whistle has 8 investors. Key investors include Qualcomm, Tractive, Mars, NGP Capital, and DCM.
Whistle operates through Antech Diagnostics, Inc..
Yes. Whistle was acquired by Mars in March 2016.
Yes. Whistle publishes Whistle: Smart Pet Tracker 2.0 and 1 more app, with over 5,000 downloads.