Chunk light tuna in water price in San Antonio.

How we got these numbers

• Instacart — Aldi:Category multiplier against Walmart base, adjusted for South Urban ($0.88)
• Walmart+:Regional baseline ($0.92)
• Amazon Fresh (Prime):Category multiplier against Walmart base, adjusted for South Urban ($1.01)
• Instacart — Whole Foods:Category multiplier against Walmart base, adjusted for South Urban ($1.84)

Live observations come from public weekly ads (Aldi, Whole Foods) and BLS Average Retail Food Prices, refreshed daily. Estimates use a per-category multiplier calibrated to NPR, Consumer Reports, and Tasting Table grocery comparison studies.

Why this category prices the way it does

Canned goods are where private-label dominance shines — Aldi's Casa Mamita and Walmart's Great Value lines undercut name brands by 30-50% on identical specs.

San Antonio grocery context

San Antonio is H-E-B country in a way only Texans understand — H-E-B operates 70+ stores in the metro and considers SA a hometown market. Among the four major national delivery services we compare, Walmart+ has the broadest physical store footprint here, with stores in nearly every San Antonio neighborhood. Instacart has a thinner partner network in SA than in larger metros — Whole Foods is available, but Aldi has limited delivery range from its small handful of SA stores.

San Antonio residents who want delivery beyond H-E-B should default to Walmart+ for any item Walmart sells. The annual $98 membership pays back within 25 orders. Use Amazon Fresh for Prime-eligible items you already get from Amazon retail.

Chunk light tuna in water prices in other cities

• Houston, TX
• Austin, TX
• Dallas, TX
• Jacksonville, FL
• Fort Worth, TX