Whistle
ReviewGlobal outsourced SDR services built by SaaS sales veterans
Clients
About Whistle
Whistle is a B2B lead generation and outsourced SDR agency founded by brothers David and Yonah Zeff after three successful tech exits spanning a decade in SaaS sales. With a team of over 100 professionals, they support companies targeting every timezone through data research, content marketing, and sales development. Their clients have raised over $2B in funding and generate $16.67M monthly in pipeline from Whistle's SDRs.
Who Whistle Is Best For
SaaS startups and scale-ups needing experienced outsourced SDR teams.
Why Choose Whistle
Whistle Services
Selected Work
WNSTN β Scaling Outreach for AI Content Detection
WNSTN / Winston AI
Whistle helped Winston AI (WNSTN) scale outreach to institutional markets for its AI content-detection platform, targeting high-intent personas in a crowded SaaS category.
View case study
Biteable β Validating Enterprise Sales Motions
Biteable
Whistle supported Biteable, a video creation platform, in validating enterprise sales and accelerating product insights as inbound interest from larger organizations grew.
View case study
vcita β Building a US-Hours SDR Team Fast
vcita
Whistle stood up a high-performing SDR team for Israel-based vcita to strengthen US market presence on a tight two-month recruiting and campaign timeline.
View case studyReviews from Google
Working with this team has been fantastic. They are flexible to our needs, consultative on best practices, and just overall understanding and a pleasure to work with. They've helped our business grow and we've integrated them into how we deliver our services as an agency too. I know our outreach activities are safe in their hands and it removes a lot of worry hoping that it gets done - they do it!
Solid, professional team and a great partner for my marketing agency! They prove great results and i would highly recommend them!
Reviews sourced from Google
See all 24 reviews on GooglePhotos
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