About us

Finding customers is the hardest problem in business. And we’ve solved it. Thousands of times.

To date, our customers have raised over $2Bn in funding and generate over $16.67M per month in pipeline sourced from Whistle’s SDRs. Our aim is to give fast-growing companies a better chance of success in scaling global growth.Whistle is headed by brothers David and Yonah Zeff and was founded in 2020, following 3 tech exits spanning a decade in SaaS sales. We currently support companies targeting every timezone – this is made possible by our incredible team of over 100 people that support our services through Management, Operations, Data Research, Content Marketing, Sales, and Sales Development.

Our Core Values
Drive Our Success

We win together

No one is solely responsible for success 
or failure. Our company is made up of collaborative groups of people working together, towards a common vision. 
While we praise individualism, but we prioritize winning together.

We work with people we like and trust.

This goes for Clients and Whistlers. We strive to create an environment of trust, transparency, support, respect, happiness and growth. If someone does not share these traits then we do not work with them.

We look for the simplest solution first.

When in doubt, look for the simplest, least resource demanding solution to the problem at hand. Before we get smart, we get dumb.

We own our desk

We are responsible for our own success, growth, failures and learnings and we earn our position every day.

We have each 
other’s backs

We treat all of our customers with respect and we wish to delight our customers. However, when in conflict, the team takes precedence over the customer.

We have a growth mindset

As individuals and as a company we must adopt a growth mindset, there is no skill or task beyond our reach. What we achieve is simply a function of time, resources and effort.

We enjoy what we do.

Our brains function best when we are happy, find joy in what you do everyday. Happiness is also contagious. We take our work seriously but we make sure to also enjoy it.

We're a fully remote company, led by merit and strong values. We don't only encourage innovation & self-starter attitudes, we reward it.

Apply To Join The Team

Our Team

Dedicated professionals committed to excellence.

David Zeff

CEO

3 exits, nearly 500 B2B deals signed

Yonah Zeff

COO

Obsessed with creating and fixing complex systems

Lynne Cumings

HR Director

You must touch the heart to move the mind

Bronwyn Johnson

Customer Success Manager

Failing to plan is planning to fail

Kayla du Plessis

Head of Branding & Content

Do what you love

Claire Webster

Head of Partnerships

Believe you can and you're half way there!

Proven success with companies in your industry

Real world results from companies that partnered with Whistle to generate qualified pipeline faster.
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Over 300 Companies Trust Whistle
  • WIX
  • Intel
  • Zendesk
  • Wellness
  • RingCentral
  • Aironworks
  • EBSCO
  • Adaptive Shield
  • Alb
  • Acc
  • Acce
  • AF
  • Ministry
  • Paloa
  • Air
  • 7taps
  • 42

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