Vietnam is showing how Southeast Asia's online retail contest is narrowing around Shopee and TikTok Shop, Tech Collective SEA wrote in an article on social commerce.

Between May 2025 and April 2026, Shopee's Vietnam share moved from 61% to 53%, while TikTok Shop rose from 33% to 44%.

TikTok Shop's gross merchandise value was up 83% year on year, and Vietnam's ecommerce sales reached US$5.64 billion in the first quarter of 2026 after 47% growth.

Discovery Changes The Marketplace

The shift is operational as much as competitive.

Traditional marketplaces start with search: a buyer enters a product term, compares price, reviews and delivery, then chooses an item.

TikTok Shop moves the start of that process into short video and livestream content, where products are encountered during entertainment rather than through a direct search query.

Shopee remains the larger regional ecommerce platform, but its response is to add more social-commerce functions to a marketplace that already has scale.

Livestream shopping, creator programmes, affiliate marketing and recommendation systems are becoming defensive tools as much as growth features.

That changes what merchants have to build.

Product listings, search placement and pricing still matter, but video production, creator partnerships, affiliate campaigns and livestream operations are becoming part of commerce infrastructure.

Marketing budgets therefore move from simple sponsored listings toward content-led selling and audience retention.

Vietnam Points To Regional Concentration

Vietnam is useful because it shows concentration and growth at the same time.

Vietnam is therefore an early example of platform competition moving from catalogue scale toward control of product discovery.

Across Southeast Asia, the source cited reports putting platform ecommerce gross merchandise value at US$157.6 billion in 2025.

The cited reports put Shopee, TikTok Shop including Tokopedia, and Lazada together at 98.8% of that total, leaving merchants dependent on a small set of platform rules, advertising systems and logistics options.

The two-player dynamic does not eliminate demand for supporting startups.

It can increase the need for software and services that help merchants operate across platforms.

Inventory synchronisation, order handling, advertising management and unified analytics become more important when sellers have to manage content, transactions and fulfilment in parallel.

Infrastructure Opportunity Moves Around Platforms

Logistics remains another support layer.

Shoppers still expect fast and reliable delivery regardless of whether a purchase began from search, a video recommendation or a live shopping session.

Warehousing, last-mile routing, returns and cross-border logistics can therefore benefit from platform growth without challenging Shopee or TikTok Shop directly.

Merchant enablement is the other opening.

AI content tools, creator-campaign management, livestream production systems and performance analytics become more valuable as social commerce demands continuous media production.

The operating burden shifts from listing products to running a content, data and fulfilment loop.

For platform operators, the practical issue is control of the shopping path.

Search-led commerce rewards catalogue depth and transaction reliability, while content-led commerce rewards attention, creator supply and recommendation quality.

Merchants have to prepare for both routes when buyer discovery and checkout are owned by the same few ecosystems.

how durable the concentration becomes outside Vietnam remains unresolved.

The article gives market shares, growth rates and platform positions, but it does not show whether Shopee's marketplace-led social features or TikTok Shop's content-led model produces better merchant economics across Southeast Asia.