Kai Viertel
Co-Founder & CMO, SendSeven
Kai Viertel is Co-Founder & CMO at SendSeven. Previously, he spent seven years leading demand generation and social media at Sinch (formerly MessengerPeople), Europe's leading messaging platform. With 15+ years in digital marketing, including roles at ProSiebenSat.1 and communications agency fischerAppelt, he helps businesses get the most out of messenger communication for marketing, e-commerce, and customer service.
- WhatsApp Business API
- Multichannel Messaging
- Customer Engagement
- Demand Generation
- B2B SaaS Marketing
- Conversational Marketing
- WhatsApp Newsletter
- Omnichannel Strategy
- Messenger Marketing
- Co-Founder & CMO — SendSeven (2026–heute)
- Head of Demand Generation & Social Media — Sinch (formerly MessengerPeople) (2018–2025)
- Digital Marketing — ProSiebenSat.1 (2014–2018)
- Communications & Digital — fischerAppelt (2010–2014)