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Comparison

Sainsbury's vs Tesco

Sainsbury's and Tesco both land on Depends.

Sainsbury's

sainsburys.co.uk

Depends

Confidence: Medium

A sound choice for UK weekly groceries if a store is near you and you use Nectar Prices.

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Tesco

Depends

Confidence: Medium

Tesco is a supermarket, not software: it fits UK households doing weekly grocery shops, especially Clubcard members.

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Sainsbury's versus Tesco
Compare	Sainsbury's	Tesco
Verdict	Depends	Depends
Best for	UK weekly grocery shops	UK weekly grocery shops
Who it's not for	Shoppers expecting the cheapest basket . Tesco beat its price-match scheme	Anyone outside UK/Ireland delivery zones
Privacy	No public vulnerabilities in.uk itself; 2025 incidents touched the loyalty scheme and a shared supplier.^⁶	Multiple historical incidents (2014, 2016, 2021); no new breach evidence in the sources reviewed.
Support quality	3.6/5 Trustpilot; complaint threads dominate reviews	Only review counts found, no service detail
Public sentiment	Mixed at 3.6/5 on Trustpilot, with online substitutions, price creep, and billing discrepancies dominating negative reviews.^¹	Shoppers value the range and delivery convenience but repeatedly complain that prices feel volatile, rising, and Clubcard-dependent.
Biggest gotcha	Substitutions arrive wrong or overpriced; you must manually check the substitution price promise.^⁴	Breach history: Tesco Bank 2016, Clubcard accounts, 2021 hack attempt

Pick Sainsbury's when

UK weekly grocery shops
Nectar members chasing member prices
Click & collect and local top-ups
Just Eat rapid delivery users

When Sainsbury's is not a fit

Shoppers expecting the cheapest basket . Tesco beat its price-match scheme
Online orders needing exact items . substitutions frustrate
Anyone outside Sainsbury's delivery zones
Bill-averse shoppers . checkout discrepancies reported

Pick Tesco when

UK weekly grocery shops
Clubcard deal hunters
Online delivery regulars

When Tesco is not a fit

Anyone outside UK/Ireland delivery zones
Buyers evaluating software . this is a supermarket
Shoppers prioritising stable, low prices

Sources

Trustpilot reviews of sainsburys.co.uktrustpilot.com
review
Has Sainsbury's got noticeably more expensive? . Redditreddit.com
review
Beware of online grocery shopping at Sainsburys . Mumsnetmumsnet.com
review
Be careful . Sainsbury's substitution policy . MoneySavingExpertforums.moneysavingexpert.com
review
Check your online delivery bill . MoneySavingExpertforums.moneysavingexpert.com
review
Sainsbury's Rewards Program Targeted by Malicious Actor . RHISACrhisac.org
security
Tesco and Sainsbury's supplier hit in cyber attack . City A.M.cityam.com
security
Low everyday prices . Sainsbury'ssainsburys.co.uk
official
Nectar Prices Offers . Sainsbury'ssainsburys.co.uk
official
Delivery Pass explained . Sainsbury's Helphelp.sainsburys.co.uk
official
Sainsbury's partners with Just Eat . New Food Magazinenewfoodmagazine.com
news
Sainsbury's loses battle with Tesco over price match . Marketing Weekmarketingweek.com
news
Sainsbury's data case study (1,400+ supermarkets) . Strategysoftware.strategy.com
news
Tesco.com Trustpilot reviewstrustpilot.com
review
Tesco reported to competition watchdog over pricingreuters.com
news
Tesco website and app back online after hack attempttheguardian.com
security