Chewy vs. MercadoLibre: Which E-Commerce Stock Is a Better Buy in 2026?

MercadoLibre is presented as the stronger long-term pick over Chewy, supported by FY2025 revenue growth of 39.1% to $28.9 billion, $2.0 billion of net income, a 6.9% net margin, and nearly $10.8 billion of free cash flow. It also exceeded $10 billion in quarterly revenue for the first time in Q2 2026, as e-commerce and Mercado Pago fintech growth accelerated across Latin America. Chewy generated FY2025 revenue of $12.6 billion, up 6.2%, with a 1.8% net margin, offering lower valuation multiples but slower growth and operational risks tied to competition, clinic expansion, and shipping dependence.

Analysis

MELI's premium is justified only if Mercado Pago continues to convert commerce engagement into higher-frequency payments, merchant acquiring, and credit without a corresponding rise in loss provisions. The key second-order risk is that logistics and free-shipping investment can improve buyer retention while masking weaker incremental commerce margins; the market will likely reward revenue durability in the next 1-3 months but re-rate the stock on contribution-margin and credit-quality evidence over 6-18 months. Reported free cash flow should not be treated as fully distributable without separating fintech customer-fund flows, lending-book funding, and working-capital movements.

CHWY is less a simple value alternative than an operating-leverage and capital-allocation question. Its low margin leaves limited room for freight, promotional, wage, or veterinary-clinic ramp costs to erode earnings, while a sub-1x current ratio makes inventory discipline and vendor terms more important than headline revenue growth. The strategic upside is that veterinary services can raise lifetime value and reduce Amazon substitution; the downside is that clinic expansion converts a historically asset-light recurring-revenue model into one with local labor scarcity, execution risk, and slower payback.

Consensus likely underestimates the asymmetry in a MELI/CHWY pair: MELI is exposed to a simultaneous de-rating if local FX weakens, regulatory capital requirements rise, and credit losses normalize, whereas CHWY already embeds skepticism but needs a credible margin catalyst to outperform. AMZN is not necessarily the clean short hedge because its pet-category gains are immaterial to consolidated results; the more relevant read-through is whether AMZN's shipping-price actions and retail promotional intensity pressure CHWY gross margin.

Near-term catalysts are MELI's take-rate, credit-loss and FX disclosures, and CHWY's Autoship/customer cohort trends plus clinic-level profitability. Falsify a long-MELI thesis if credit provisions outgrow fintech revenue for two quarters or if FX-adjusted growth decelerates materially; falsify a CHWY recovery thesis if gross margin contracts despite stable customer growth or clinic losses require a cut to cash-flow expectations.

Key Decisions for Investors

• Maintain a 3-6 month long MELI / short CHWY dollar-neutral pair rather than an outright MELI long: it isolates superior ecosystem monetization from broad consumer-discretionary risk. Target a 15-20% relative return; exit if MELI's incremental margins weaken alongside rising provisions, or if CHWY demonstrates sustained margin expansion from veterinary services.
• Do not underwrite MELI on headline free cash flow. Before increasing exposure at the next earnings event, require disclosure showing stable net credit losses, funding costs, and customer-fund/working-capital normalization; absent this, treat any post-results rally driven solely by revenue growth as a trim opportunity.
• Use CHWY as a tactical long only after evidence of two consecutive quarters of gross-margin stability and positive clinic contribution economics. The potential reward is multiple expansion from a depressed revenue valuation, but the stop condition is a guidance cut tied to fulfillment, labor, or veterinary start-up costs.
• Monitor AMZN retail shipping and promotional commentary over the next two quarters as an early warning indicator for CHWY. A renewed Amazon-led price/shipping push would favor retaining the CHWY short leg; a moderation in promotional intensity is the principal competitive catalyst for covering it.