Essential
Citronnier
The world's leading Medical SaaS pioneer. From EMR to advanced Bio-Investment platforms, we engineer the future of health.
We're Attending
ASCO 2026!
Essential Citronnier is heading to the world's leading oncology conference. Meet us in Chicago and discover our Cancer Diary and Medical SaaS solutions.
Oncologists, BD & VC partners — we'd love to hear from you.
Let's connect at ASCO 2026.
Pioneering Medical SaaS
We build the world's best software for the medical industry, connecting data, patients, and professionals.
My Cancer Diary
An iOS health management app for cancer patients. Treatment schedules, symptom diaries, AI nutrition analysis, and emotional journaling — with you through every moment of treatment.
Buybio Bio-Invest
The premier investment platform specialized in the biotech and pharmaceutical sectors.
Sinsindangbu Care
AI-powered food photo nutrient analysis, CKD stage-specific management, and AI health consultation for kidney patients. Co-developed with Mediologie.
Hospital Website Development
Custom planning, design, and development of websites for hospitals and clinics.
Advanced EMR
Next-generation Electronic Medical Record system optimizing clinical workflows.
Hospital AX Transformation
Complete hospital digital transformation with GEO optimization, EMR integration, and custom app development.
JamJam Sleep App
An iOS sleep app with timeline tracking, checklist routines, and sleep-debt graphs.
Hair Loss Management
Comprehensive tracking and personalized care solutions for hair health.
Medical Dictionary
The most accurate and up-to-date medical terminology database for professionals.
Lemon Medical Blog
Insights and updates on medical technology and health trends.
TMEDIO Lab Website
Official website for Professor Kim Hye-Ryun's Translational Medicine Immuno-Oncology Lab at Yonsei University Severance Hospital.
Lab-Connected
Integrated laboratory operations infrastructure (B2L SaaS) based on the Early Startup Package business plan.
ODV-Annotate
AI-powered DICOM annotation on your Mac. Fully local, fully private. Powered by Gemma 4 E4B on Apple Silicon via MLX.
LemonFit
A subscription SaaS for gyms and fitness centers built around member booking, a real-time heart-rate dashboard, and AI diet analysis, with a B2B2C model where members continue on the LemonFit app's individual plan.