Mateusz Sekta | GTM Expert

Outbound lead generation that books meetings.

Cold email, LinkedIn and GTM engineering for B2B founders who need a predictable pipeline without burning their domains.

I'm Mateusz Sekta, founder of Vanderbuild. We build outbound sales engines for SaaS, software houses and agencies. 250+ campaigns in 2025. #2 worldwide at Clay Cup, the GTM engineering tournament.

On this channel you'll find:
→ Cold email campaign breakdowns with real numbers
→ LinkedIn lead generation that starts conversations
→ B2B go-to-market strategy: ICP, segments, offers
→ Lead generation tools: Clay, HeyReach, Instantly, AI workflows
→ Deliverability mistakes that kill your reply rate

For B2B founders, heads of sales and growth leads who want pipeline they can forecast.

New video every Wednesday at 4 PM CET. Shorts during the week.

Want us to build outbound for you? Book a 30-min call. You'll leave knowing which system fits, or that none does.