Experiment5M

Experiment5M is a Warsaw-based B2B outbound sales agency that has been operating since 2015. The agency focuses on personalized lead generation through cold email, LinkedIn outreach, and outbound strategy development. With a small team of senior sales professionals, they bring a structured, data-driven approach to every campaign.

What sets Experiment5M apart is their use of the PDCA (Plan-Do-Check-Act) methodology. This continuous improvement framework allows them to test, measure, and refine outreach efforts systematically. They combine this with a "base waterfall" approach that layers multiple data points for each contact, ensuring high relevance and personalization. The agency also emphasizes lead nurturing and soft skills to guide prospects through the decision process.

Experiment5M's services cover the full outbound spectrum: cold email campaigns, LinkedIn outreach, lead generation, sales automation, and market research. They work primarily with B2B service companies, including software houses, marketing agencies, SaaS providers, and other professional services firms. Their team size of 1-10 employees means clients get direct access to experienced outbound specialists rather than junior staff.

Pricing is hourly at $25-$49 USD, which is competitive for a specialized agency. They also offer a free pilot program, allowing potential clients to test their approach before committing. This low-risk entry point is particularly attractive for companies new to outsourced prospecting.

Client feedback is consistently positive. One client reported a 70% increase in leads through cold emailing alone. Others highlight the agency's responsiveness, quality of work, and ability to meet deadlines. The personalized approach and alignment with client values have led to long-term partnerships.

For B2B companies that need a reliable, results-driven outbound partner, Experiment5M is a solid choice. Their methodical approach, combined with senior-level execution, makes them particularly well-suited for European markets where cold email and LinkedIn outreach remain highly effective channels. The free pilot is a smart way to evaluate fit before scaling.