Australian E-Commerce Competitive
Landscape 2025–2026

Australian e-commerce has a clear three-tier structure. At the top sits Amazon, which overtook eBay as the country's most-visited online marketplace in 2023 with 75.2 million average monthly visits — 48% above eBay's 50.9 million.[Ocean Port Link] Behind the two dominant marketplaces, Woolworths and Coles operate grocery-anchored online channels with expanding general merchandise ambitions. A third tier — Kogan, Catch, MyDeal, JB Hi-Fi, and The Iconic — competes for specific categories but lacks the traffic scale or fulfilment infrastructure of the top two.

The gap between tiers is not closing. Amazon's Prime membership, estimated at 4.5 million subscribers (roughly 45% penetration of eligible Australian households), creates a retention engine that compounds over time.[Ocean Port Link] The supermarkets' advantage is structural in a different way: they own the one category — fresh grocery — that no pure-play marketplace has cracked, and their store networks double as last-mile fulfilment hubs. Third-tier players are not losing ground catastrophically, but they are being squeezed from above by Amazon's product range and from below by ultra-low-price entrants Shein and Temu.

Market concentration is self-reinforcing. Australia Post's data identifies product range (64% of shoppers cite this as a reason to choose Amazon), trusted quality (58%), and efficient returns (49%) as the primary reasons shoppers default to established platforms.[Ocean Port Link] These advantages accumulate at scale — the more sellers a platform attracts, the wider the range, the better the prices, and the stronger the retention. Smaller platforms cannot replicate this loop without the capital to subsidise sellers and fulfilment simultaneously.

The clearest strategic dividing line in Australian e-commerce is between platforms that win through membership economics and those that win through price. Amazon sits firmly in the first camp. Prime's 93% first-year retention rate means each new subscriber is likely to remain an active buyer for at least two years — a compounding advantage that makes customer acquisition cost far less important than for rivals who must re-win each transaction.[Saras Analytics] Tactics like Subscribe & Save, Brand Tailored Promotions targeting cart abandoners, and urgency messaging during Prime Day 2025 (which saw 27% year-on-year growth and a 128% increase in first-time customers) are designed to deepen that lock-in, not simply drive one-off sales.[Pattern AU]

The supermarkets operate a different model: they use grocery frequency to anchor the relationship, then extend wallet share into general merchandise. Woolworths' 15.1% e-commerce penetration in Q4 FY2025 reflects a customer base that already shops weekly for groceries and finds adding a household item to the same order frictionless.[Morningstar] Coles is replicating this with two dedicated automated warehouses that improve picking speed and delivery reliability — its Q1 FY2026 supermarket sales grew 5% against Woolworths' 2%, suggesting execution is currently sharper.[Morningstar] Neither supermarket has cracked general merchandise at Amazon's range depth, but that may matter less if grocery frequency keeps the customer relationship alive.

Kogan and Catch compete primarily on price in electronics, home goods, and apparel — a positioning that works when they are genuinely cheaper but collapses when Amazon or Temu undercuts them. Both platforms charge sellers relatively high commissions (10–20% depending on category), which limits how far they can discount without margin deterioration. The Iconic holds a defensible position in fashion through curation, brand partnerships, and a returns experience that commodity marketplaces have not matched — but it is not competing for grocery or electronics dollars.

The fight for third-party sellers is the most tangible competitive battle in Australian e-commerce right now. Sellers choose platforms based on three things: commission rates, fulfilment costs, and the size of the customer audience their listings reach. MyDeal — now backed by Woolworths' capital — moved aggressively in H2 2025, cutting commissions by 3–5 percentage points (electronics dropped from 12% to 9%), waiving its Premium seller fee through Q4, and reporting 20% seller onboarding growth as a result. The stated target is GMV of $1.4B in FY2026, up from an estimated $1.2B in FY2025.[Research data]

Catch responded in October 2025 by cutting commissions 2% across electronics and home categories — a smaller move that signals awareness of the threat but not a comparable commitment. Amazon made a different kind of adjustment: a 5–10% reduction in FBA inbound placement fees for small and medium sellers in July 2025, positioning the cut as an efficiency improvement rather than a competitive response. Amazon's calculus is that Prime audience reach justifies higher total costs — sellers who want access to 4.5 million Prime members will pay a premium for it. Kogan made the smallest adjustment of the group, cutting commissions by 1% in high-volume categories in November 2025.

The risk for MyDeal is that fee cuts are easy to copy and hard to sustain without the margin from a parent company willing to subsidise growth. Woolworths is providing that subsidy, but the strategic logic only holds if cheaper seller fees translate into a wider product range, which attracts more buyers, which justifies the subsidy. That loop has not yet been proven at the GMV scale MyDeal is targeting — and if Woolworths' grocery margins come under pressure, the subsidy capacity narrows.

The most important structural dynamic in Australian e-commerce is that entry barriers are low at the storefront level but extremely high at the logistics and data layer. Any brand can list products on Shopify, but building a fulfilment network that delivers in two days across Australia's geographically dispersed population requires capital and time that most new entrants cannot mobilise. This asymmetry explains why Amazon, Woolworths, and Coles have held their positions despite years of challenger activity.

Supplier bargaining power is moderate and category-dependent. In consumer electronics and apparel, major brands can and do restrict where their products are sold — but most categories have enough alternative suppliers that no single brand can dictate platform terms. Cross-border supply chains, which account for an estimated 14.1% of Australian e-commerce sales, further reduce domestic supplier leverage by giving platforms access to international inventory at lower cost.[Ken Research]

The threat from Shein and Temu is the most underappreciated substitution risk. These platforms do not compete on range or trust — they compete on price so low that quality concerns become secondary. Their penetration among 18–24-year-olds (Shein at 47%, Temu at 25% in its first year) suggests they are building the shopping habits of the next decade's highest-value demographic.[Ocean Port Link] None of the established Australian platforms has mounted a credible response.

The grocery fulfilment battle is the most clearly evidenced of the three. Coles outperformed Woolworths on sales growth in Q1 FY2026 (5% vs 2%) by deploying two dedicated automated warehouses that improve picking speed and delivery reliability.[Morningstar] Woolworths is responding through discounting and loyalty points — its net promoter score improved 3 points quarter-on-quarter to 50, and October 2025 sales momentum recovered to 3%.[Morningstar] Analysts forecast Coles' edge narrowing by FY2027 as Woolworths' structural cost advantage enables deeper price cuts. This fight matters beyond grocery: whoever builds the most trusted, fastest fulfilment network in grocery has the infrastructure to expand into general merchandise at lower incremental cost.

The seller acquisition battle is less visible but more structurally significant. When MyDeal cuts commissions by 3–5 points and Catch responds with 2-point cuts, the real outcome is a compression of platform margins across the entire third tier. Sellers who move to lower-fee platforms do not necessarily bring their customers with them — they may simply arbitrage costs while maintaining listings across multiple platforms. Amazon's response to this dynamic is instructive: rather than cutting commissions, it reduced FBA storage fees to improve seller economics without touching referral rates, protecting the revenue model while reducing the operational cost complaint.

The under-25 price battle is the most strategically neglected. Shein's 47% penetration and Temu's 25% first-year Australian penetration among younger shoppers are not just market share statistics — they represent habit formation in a cohort that will be peak online spenders by 2030.[Ocean Port Link] No Australian platform has launched a credible structural response: no dedicated low-price storefront, no ultra-fast fashion vertical, and no visible investment in the social commerce formats (TikTok, Instagram) that drive Shein and Temu discovery. This gap is the clearest signal of where a challenger with the right product and capital could take share.

Amazon Australia holds a 1.6-star average rating on ProductReview.com.au from 2,504 reviews — one of the lowest scores for a major retailer on the platform.[ProductReview] The most common complaints centre on delivery delays (10–15 days for imported items despite Prime promises), product quality inconsistency for third-party marketplace listings, and difficulty reaching customer service. This low score coexists with Prime's reported 93% first-year retention rate — a paradox explained by the difference between dissatisfied customers who stay because switching is inconvenient and genuinely delighted customers who would never leave.

Comparative satisfaction data for Kogan, Catch, The Iconic, and Big W online is not available from named public sources in the 2024–2025 period covered by this research. The ProductReview.com.au data for Amazon is the only cross-verified public satisfaction signal in the evidence base. Confidence in broader cross-platform satisfaction comparisons is LOW — any ranking of competitors on customer experience would require data that is not publicly available from named platforms.

The Amazon complaint pattern is instructive regardless of comparisons: the gap between promised Prime delivery speed and actual import delivery timelines is a recurring, specific, addressable complaint. A platform that could credibly promise and deliver two-day shipping on the categories where Amazon relies on slower cross-border fulfilment would have a genuine conversion argument. This is precisely the territory Woolworths' MyDeal integration is trying to exploit — Australian-stocked inventory with Woolworths' distribution network.

The base case is the most defensible given current evidence: Amazon extends its marketplace lead, the supermarkets solidify grocery e-commerce dominance and make modest general merchandise gains, and the third tier (Kogan, Catch, MyDeal) consolidates through fee pressure and attrition. This outcome requires no dramatic strategic shift from any incumbent — it is the direction current momentum is already pointing.

The bull case for challengers requires Woolworths' MyDeal integration to actually work at scale: seller fee cuts translate into a meaningfully wider product range, Woolworths' 15-million-plus grocery shoppers shift meaningful general merchandise spending to MyDeal, and Coles responds with an equivalent marketplace integration. That chain of events is plausible but unproven — the GMV targets MyDeal has set for FY2026 will be the first real test.

The bear case is a market disrupted by forces none of the incumbents are currently addressing: Temu and Shein continue building habitual purchasing among under-25s, social commerce platforms (TikTok Shop, Instagram) emerge as a meaningful discovery and transaction channel, and Australian consumers normalise buying directly from Chinese manufacturers without a domestic marketplace intermediary. In this scenario, the fee battles between Kogan, Catch, and MyDeal become irrelevant because the customers have moved somewhere else entirely.