ONCE is a legal, medically supervised psilocybin center based in Amsterdam, supporting clients across Europe with a structured, safety-first approach.

We work with people who feel stuck in chronic stress and burnout, when life is full and stepping away for weeks isn’t realistic. Our model is designed to fit around real schedules, without sacrificing rigor and safety.

What we offer (hybrid program, typically 4–6 weeks):
• A calm initial conversation (online).
• Medical screening + personalised plan with a licensed physician.
• 2+ online preparation sessions (IFS-informed).
• Full on-site days in Amsterdam for the psilocybin sessions.
• 2+ online integration sessions to translate insights into practical change.

Once Wellbeing Center

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Once Wellbeing Center

Org chart

Teams

Offices

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