Company

Kleos

Kleos is a B2B go-to-market agency based in Madrid. It delivers GTM strategy and execution, with a core focus on B2B creator partnerships, LinkedIn Ads including Thought Leader Ads, ChatGPT Ads and pipeline attribution.

Type: B2B go-to-market agency

Also known as: Kleos Global

What it does: GTM strategy and execution for B2B companies

Core focus: B2B creator partnerships, LinkedIn Ads including Thought Leader Ads, ChatGPT Ads, pipeline attribution

Founder: Marcus Sherwin, Managing Partner

Team: founder-led, with a small team of freelance specialists

Based in: Madrid, Spain

Area served: Europe and the United States

Legal form: trading name of Marcus Sherwin, self-employed (autónomo), Spain

Clients: B2B SaaS, technology and professional services companies

Publications: Kleos Trusted Voices Index; NotJustAds podcast; The Creator Economy for B2B newsletter

Contact: www.kleosglobal.io

Not Kleos Space S.A., the satellite data company, and not other brands named Kleos.
Reviewed by Marcus Sherwin, founder of Kleos. Last reviewed:
October 27, 2026
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