Keystone International Ventures
We build complex products that disrupt industries with innovation.
Keystone is a Singapore-based software company. We design, build, and operate a focused portfolio of products used by professionals every day.
Registered in
Singapore
Business reg. (UEN)
202515841E
Founded
2025
Our products
What we build
Each product solves a concrete problem for a specific kind of professional.
AI Calendar Assistant
Dai.sy
Connect and manage multiple Google Calendars through a single assistant that schedules, reschedules, and keeps every account in sync.
dai.syVoice AI for Clinics
Daisy MD
An AI assistant for medical practices that handles pre- and post-surgery patient calls, appointment scheduling, and follow-ups — so clinical teams can focus on care.
doctors.dai.syTechnology Studio
nanogr.am
Product engineering, applied AI, and growth for organizations tackling hard technical problems.
nanogr.amCompany
A real company behind every product.
Keystone International Ventures Pte. Ltd. is a software company registered in Singapore (UEN 202515841E). We build and operate the products above as a single, focused portfolio.
Our mobile applications are published on the Apple App Store and Google Play under Keystone International Ventures. We partner with healthcare teams, operators, and businesses who want dependable software backed by a real company.