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 $15M 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.

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 $15M 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 Culture

We are a 100% remote company, which allows us to recruit diverse, global talent with unique skill sets and fresh perspectives.

One of our top priorities is ensuring that our home-workers do not feel like lone-workers. That’s why we started the Whistle Wellness program – it gives the team a means to connect outside of work – through activities like meditation, personal training sessions, feel good Spotify playlists, a book club, meal plans and more. The goal is to promote happiness, wellness, team bonding and a healthy work-life balance.

We are a company led by merit – we don’t only encourage innovation and self-starter attitudes, we reward it. After all, we believe that the only way we can become, and remain, the #1 leader in sales development is by relying on the input of all 100+ Whistlers.

Executive Team

It takes a huge, highly professional (sometimes eccentric) group of characters to sustain a company like Whistle. And the team who lead them are no different.

David Zeff | CEO

3 exits, nearly 500 B2B deals signed
3 kids, nearly 500 diapers changed

Yonah Zeff | COO

Obsessed with creating and fixing complex systems
I swear I didn’t break it first

Lynne Cumings | HR Director

You must touch the heart to move the mind
I still believe in miracles

Bianca McGuire | HR Manager

Don’t simply identify challenges, identify solutions!
And a cuddle from your pet is always the best solution!

Bronwyn Johnson | Senior Account Manager

Failing to plan is planning to fail
Still can’t plan a holiday though

Tracy Davidson | Account Manager

Sell the problem you solve, not the product
It’s true, you do love your grandchildren more than your kids

Nicole Victor | Account Manager

The greatest danger is not that you set your goals too high and fail to achieve them
It’s that you set them too low and you do

Marc Brooker | Account Manager

You only die once, so live every day!
But don’t live too hard, or that day might come sooner than expected

Cat Van-Wijk | Key Account Team Leader

Too much of a good thing can be wonderful
Especially laughter. There can never be too much of it

Mike Simmermacher | Key Account Team Leader

Embrace every challenge like a pro
Because even a pizza started off as a dough with dreams

Nicole Webster | Head of Sales

Some dream of success, others wake up and make a it happen!
Mom, wife, hard-worker, part-time karaoke star

Claire Webster | Partnerships Manager

Believe you can and you’re half way there!
If I’m ever killed by a lion, just know my last words were “here kitty kitty”

Kirsten Bredekamp | Head of Revenue Operations

Developing global relationships
Haven’t been caught yet

Kayla du Plessis | Head of Brand Marketing

Do what you love
and do it well

Chean Goodrich | Marketing Manager

If you see it in your mind, you hold it in your hand
When in doubt, peace or pout

Jason Goodrich | IT Manager

IT is like a McDonald’s ice-cream machine…
…something is always broken

Client testimonials

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