Case Study: leadstreet achieves 12X client growth and 80% inbound leads with HubSpot

HubSpot Partner Agency leadstreet Creates a Roadmap for Success

leadstreet is a Belgian inbound agency founded in 2014 by publishing veterans Johan Vandecasteele and Johan Vantomme. Faced with declining returns from traditional marketing and the need for a single, scalable marketing automation platform, the founders aimed to prove the value of inbound to clients and quickly demonstrate measurable ROI.

They joined the HubSpot Partner Program and used HubSpot to build their own inbound-ready site (blogs, landing pages, SEO, CTAs, forms) and to implement CRM-driven inbound sales for clients like Amplexor. The approach delivered strong results: a 12X increase in clients, 80% of leads now from inbound marketing, 40% of clients on retainer, Platinum Partner status, and client wins such as 400 high-quality leads in one month and revenue growth within three to six months.

leadstreet

Johan Vandecasteele

Founder