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Comparison

Tesco vs Sainsbury's

Tesco and Sainsbury's both land on Depends.

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

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 versus Sainsbury's
Compare	Tesco	Sainsbury's
Verdict	Depends	Depends
Best for	UK weekly grocery shops	UK weekly grocery shops
Who it's not for	Anyone outside UK/Ireland delivery zones	Shoppers expecting the cheapest basket . Tesco beat its price-match scheme
Privacy	Multiple historical incidents (2014, 2016, 2021); no new breach evidence in the sources reviewed.^⁸	No public vulnerabilities in.uk itself; 2025 incidents touched the loyalty scheme and a shared supplier.¹⁵
Support quality	Only review counts found, no service detail	3.6/5 Trustpilot; complaint threads dominate reviews
Public sentiment	Shoppers value the range and delivery convenience but repeatedly complain that prices feel volatile, rising, and Clubcard-dependent.	Mixed at 3.6/5 on Trustpilot, with online substitutions, price creep, and billing discrepancies dominating negative reviews.¹⁰
Biggest gotcha	Breach history: Tesco Bank 2016, Clubcard accounts, 2021 hack attempt^⁸	Substitutions arrive wrong or overpriced; you must manually check the substitution price promise.¹³

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

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

Sources

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
Tesco apologises after software issue hits website and appbbc.com
news
Tesco changes Clubcard plan after complaintsthe-independent.com
news
Tesco popularity & fame . YouGovyougov.com
review
Who Are Tesco's Main Competitors? . Investopediainvestopedia.com
news
Tesco Bank Suffers Data Breachamtivo.com
security
Everyday Low Prices . Tesco Groceriestesco.com
official
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