TESO

TESO is a Vietnam-based IT development company founded in 2018, with offices in Ho Chi Minh City and Hanoi. The company specializes in building loyalty apps, mobile applications, websites, and custom software for clients across the US, Japan, and Southeast Asia. Their flagship product is a loyalty platform: they built the VitaDairy Reward app for VitaDairy Dairy Group, which now has close to 1 million users, 16,000 daily active users, and has generated 7 million conversions and 50% year-on-year growth in new users and revenue for the client.

Services and capabilities

TESO's core offerings include website development, mobile app development, custom software solutions, ERP systems, offshore development services, and technology consulting. The company markets itself as a "leading marketing technology solutions company" in Vietnam, with particular depth in loyalty and engagement platforms. Their approach follows a six-stage methodology: discover client needs, define underlying issues through two-way communication, design strategy, develop according to requirements, deploy for live progress tracking, and deliver after quality checks.

For loyalty apps specifically, TESO builds features around point accumulation, special discounts, customer feedback collection, user profile management, gamification, and direct customer interaction through mobile. The company claims these solutions help clients reduce marketing costs by focusing retention rather than acquisition, increase brand value, and improve competitiveness.

They offer offshore development center (ODC) services, positioning this as a way for international businesses to avoid upfront investment costs while tapping into their Vietnam-based development capacity. The company has handled clients from the USA and Japan since 2018.

Notable work

VitaDairy Reward is their marquee case study. TESO built a loyalty app for VitaDairy Dairy Group that scaled to nearly 1 million users with 16,000 daily active users. The app generated 7 million conversions and drove 50% annual growth in both new users and revenue. The company does not provide other named client case studies in the available materials, though they claim to have completed 100 projects and worked with clients across multiple industries worldwide.

How they work

TESO operates with a discovery-to-delivery cycle. Early phases involve understanding business needs and defining problems through client dialogue. Once strategy is agreed, their development team executes to spec, with clients able to track live progress during deployment. The company offers 24/7 post-launch support. No specific pricing model, contract terms, or team structure details are disclosed on their website. They operate across two offices: Ho Chi Minh City (792 Su Van Hanh, District 10) and Hanoi (169 Nguyen Ngoc Vu, Cau Giay District).

Team and credentials

Nguyen Huu An is the CEO and founder. No team size, certifications (ISO, SOC 2, HIPAA, GDPR), or partnership credentials are mentioned in the source material. The company has earned media coverage from Vietnamese outlets (Tuoi Tre, VN Express, Cafe F) and won Vietnam Startup Wheel champion in 2018. No G2, Clutch, or third-party review ratings are provided.