Yong Han Poh & Liam Appelson
OnSite
"The core problem in construction is that documentation and communication are chaotic, unsearchable, and disconnected from the physical worksite, often resulting in costly disputes, delays, and lawsuits," said Poh Yong Han. "We are building a data management layer that will anchor every message, every photo, every voice note automatically to exactly where and when it happened, without training to use."
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Despite being one of the largest contributors to the national economy, Singapore's construction industry is still one of its least digitised sectors, relying overwhelmingly on WhatsApp groups, phone calls, and paper-based documentation for on-site communication.
It was this insight that led Yong Han and Liam to join together in building OnSite, the construction industry's new old way of communicating. Powered by Whatsapp and voice messaging, OnSite allows construction teams to easily communicate, structure, and organise information, creating a legal-grade audit trail in the process.
Digital inefficiencies cost Singapore's construction sector over S$1.1 billion (US$ 860 million) annually, while across Southeast Asia, more than 65% of construction projects suffer delays due to coordination breakdowns driven by scattered, unstructured communications. Globally, bad data—largely the result of these same fragmented workflows—cost the construction industry an estimated S$2.47 trillion (US$1.84 trillion) in 2020 alone.
OnSite replaces these disconnected channels entirely with a purpose-built messaging platform that enables construction teams to communicate as they normally would via voice notes, photos, and text, and the platform's AI engine automatically structures, tags, and organizes everything by project, location, and timeline. The result is a single, searchable source of truth that doubles as a legal-grade audit trail.
Today, OnSite supports eight languages commonly used on Southeast Asian worksites, including English, Mandarin, Tamil, Bengali, Cantonese, and Malay. The platform also handles code-switching—a common reality on multilingual construction sites—and translates communication in real time.