More Sales.


Whistle is a global Sales Development Agency. We partner with growing SAAS B2B companies to accelerate sales through Sales Development, Content Marketing and Inside Sales. We offer full transparency, the best people and processes, and are a performance-driven company.

Our SDR Services

We offer two options for our SDR services

SDR Agency

Our fully-managed Sales Development Agency service is completely integrated within your systems and includes:

Your chosen number of full time SDRs

Management team
 Account Manager
 Team leader

Messaging for all outreach

CRM Optimization and ongoing support for your SDR team

500 monthly contact enrichment credits

SDR For Hire

Our highly trained and experienced Sales Development Representatives can be hired into existing systems to boost revenue growth and fuel headcount.

Our SDRs have:

2 years+ Sales/ SDR experience

Hubspot Sales Certifications

Whistle SDR Training Academy Certifications

Experience in your industry

We offer:

Global coverage – our SDRs can be hired to work in any timezone.

You keep total control of your campaigns with our
10 Day Scale-Up or Switch Out system. Within 10
business days, we will find your perfect SDR and if
you’re not 110% happy with them – we’ll find a better
fit in 10 days.

Our Clients

We’ve run 600+ campaigns for over 80 startups and scale-ups in dozens of industries

Our Results

They speak for themselves


Meetings booked by Whistle SDRs

$ 0 Mil

Monthly opportunities created

$ 0 Billion

Total $ raised by our clients

Our Testimonials

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Proud Platinum Hubspot partner

We are also partnered with Asana, Outreach and Aircall. Find out what discounts we can offer you.

We're also experienced with: