Southeast Asia’s e-commerce market grew 16% in 2025, reaching $181 billion in GMV across six markets — and the metric that explains the acceleration is not logistics density, payment penetration, or mobile adoption rates. Video commerce went from under 5% of total e-commerce GMV in 2022 to a projected 25% in 2025. Three years. Twenty percentage points. Fashion and accessories alone account for 27% of that video GMV. The 16% growth story is a video-native commerce story, and Western brands that read it as a demand surge have misidentified the mechanism.

The numbers come from the e-Conomy SEA 2025 report, the tenth edition of Google, Temasek Holdings, and Bain & Co.’s annual accounting of Southeast Asia’s digital economy. The 2024 baseline was $156 billion in GMV. The 2025 step-up to 16% correlates directly with the period in which live and video commerce reached what Momentum Works, in its 2024 platform ecommerce report, describes as “critical mass.” Bain partner Florian Hoppe puts the AI influence figure at 68% of consumers reporting that AI affects their purchase decisions — but in the SEA context, that AI is embedded in feed ranking, live-session product sequencing, and real-time audience routing, not a recommendation widget sitting below the fold on a product detail page.

The counter-argument is straightforward: TikTok Shop is a distribution channel. Any platform that captures enough eyeballs will capture GMV. The video format is the packaging; the underlying commerce mechanics are the same.

That reading doesn’t survive the platform comparison. In Vietnam, which shows the clearest evidence of a structural shift, Shopee held 56% market share in 2025 — down from 61% in 2023 — while TikTok Shop climbed from 24% to 41% over the same period, as reported by KR-Asia, citing data from Momentum Works (2023) and Metric.vn (2025). Shopee runs a highly optimized checkout funnel with promotional mechanics, gamified loyalty, deep logistics integration, and its own live commerce layer built on top of that infrastructure. If the 16% were pure demand growth, the platform with the better funnel would be capturing a proportional share of it. The GMV is moving specifically where the native format is video — not where the checkout is cleanest.

US fashion e-commerce is projected at +6.5% in 2026, reaching close to $250 billion — a substantially larger absolute market, growing at less than half the SEA rate. The dominant US investment thesis remains friction reduction: faster checkout, fewer abandoned carts, better size prediction, smarter recommendations on existing product pages. These are optimizations to architecture built in the mid-2010s, when the product detail page was the primary decision surface. The investments are defensible, but they’re compounding on a base that SEA’s fastest-growing segment has structurally bypassed.

The SEA video commerce model collapses the purchase funnel into a single session. Discovery and transaction happen in the same moment, often within the same 30-second clip. The AI operating in this model ranks who broadcasts — which seller gets surfaced to which audience, in real time — not which products are listed in a catalog. The checkout is consequential, but it is downstream of a selection process that has no direct equivalent in a checkout-optimization playbook.

The model is already exporting. TikTok Shop US GMV reached $15.1 billion in 2025, up 68% year-on-year, as reported by KR-Asia. Black Friday weekend alone generated over $500 million with 50% more shoppers than the prior year, as reported by Ad Age (TikTok’s own reported data). Against the scale of US holiday ecommerce, that number is modest. Against the growth rate, it is not. If TikTok Shop in the US compounds at anything approaching its trajectory in Vietnam and Indonesia, the gap between brands with video-native capability and those without will become a structural liability within two to three years.

The brands best positioned for that shift are not the Western brands that exported D2C playbooks into SEA. They are the local merchants who built their entire go-to-market inside TikTok Shop and Shopee Live — who understand, through iteration, the feedback loop between content performance, AI ranking, and conversion velocity. That knowledge doesn’t transfer through a consulting deck. It transfers through operating inside the format.

Momentum Works projects that generative AI could unlock an additional $131 billion in annual GMV across SEA platforms by 2030. If video commerce continues its current share trajectory — and there is no structural reason in SEA’s platform competitive dynamics for it to decelerate — the format will represent majority GMV within this period. At that point, the model that Western brands studied as an emerging-market curiosity becomes the baseline they are measured against.

The 16% growth number is real. The mechanism producing it is specific. The question is whether Western retailers are building capability for the architecture that drove it, or optimizing the step that SEA’s fastest-growing segment already skipped.