About Diby
The coaching system for fitness coaches
Diby helps fitness coaches manage clients, programs, progress, and payments in one simple system — so they can grow without losing the personal touch that makes their coaching work.
Our story
Diby was built by and with fitness coaches who were tired of running their business across spreadsheets, DMs, and a stack of disconnected tools. We saw great coaches capped not by their coaching, but by the admin around it.
So we set out to build one simple system that handles clients, programs, progress, and payments — so coaches can focus on coaching and grow without hiring a team.
Proven scale-up leadership

The Architect
Stjepan Buljat
Co-founder & CEO
- Ex-Cognism: Co-founder & CTO.
- The Win: Scaled technology from $0 to $80M+ ARR.
- Superpower: Enterprise velocity & systems.
Built with coaches. Want in?
Apply as a coach — it’s free, with no obligation to join.
Coaching grows. Admin shouldn’t.
Bring your whole coaching business into one system. Free to start.

