Nguyen Duc Hieu
Ceo-Co-Founder
Always Better
TOS (TopOnSeek) is a Search Marketing company in Vietnam, founded in 2016. In 2026, amid the powerful shift toward AI, TOS pioneers a comprehensive solution spanning GEO, AEO, AIO & SEO — helping businesses both rank higher on Google and get cited by AI search engines such as ChatGPT, Gemini, Claude and Perplexity.
TOS was founded by Mr. Nguyen Duc Hieu — an SEO expert with an IT background and over 15 years of experience — and Mr. Bui Vu Long, with many years in strategy consulting. From the very first days, TOS has shaped a service that stands apart from the market: a complete strategy that meets clients needs and serves the ultimate goals of their business.
TOS delivers a comprehensive Search AI solution (GEO, AEO, AIO, SEO) — not only growing traffic from Google but also getting your brand cited by AI, while optimizing conversion rates.
TOS delivers comprehensive GEO, AEO, AIO & SEO solutions — combining deep expertise with the latest Search AI technology to help businesses grow sustainably on both Google and AI answers.
We values efficiency, speed, and integrity in every aspect of our work
Evidence of dedication & relentless effort
Recognized by associations
TOS collaborates & develops alongside reputable industry-leading partners