Campaign Monitor Startups

Sleek Note is an email opt-in tool for e-commerce websites founded by Måns Muller in 2013. Starting from a freelance conversion optimization project that achieved 800% subscriber growth, Måns validated the idea by getting 50+ inbound inquiries. The team built a minimal viable product in 1-2 weeks and launched with 50 beta testers, achieving $55,000 MRR across ~700 customers today, entirely bootstrapped.