Short answer: there isn’t one single best store — it depends on what you want. But in Singapore the sites that most often give the deepest discounts are:

• SHEIN — regular flash sales and sitewide campaigns (items often 50–80% off during events). Great for very low prices on trend/fast-fashion items, but be careful about sizing/quality and recent complaints about misleading discount practices. (sg.syioknya.com)

• ZALORA — best for big, brand-led sitewide sales (11.11 / 12.12 and site campaigns) with stackable vouchers, cashback and brand discounts; good if you want a mix of mid‑market brands and reliable returns. (zalora.sg)

• Shopee and Lazada — marketplace mechanics (flash deals, $11 boxes, seller vouchers, bank-card promos) let you find very steep temporary discounts across many brands during mega sale periods. If you hunt vouchers and flash deals they can beat others on price. (straitstimes.com)

• Niche/local & resale options — local brands like Love, Bonito and Pomelo run big seasonal promos; pre‑owned/designer sites (eg. Vestiaire Collective) give large discounts on second‑hand designer pieces. (zula.sg)

One smart way to get the “best” discount: combine platform promos with a cashback/coupons aggregator (ShopBack is widely used in Singapore) so you earn cashback on top of voucher discounts. (shopback.sg)

Quick practical tips

• Time purchases to mega events (11.11, 12.12, mid‑year sales) — that’s when the largest stackable discounts appear. (zalora.sg)
• Stack seller vouchers + site vouchers + bank promos + cashback (via ShopBack) wherever allowed. (shopback.sg)
• Check seller ratings, product reviews and return policy — lowest price can cost you in returns and poor fit.
• Watch out for potentially inflated “original” prices or misleading discount claims (consumer watchdogs have investigated this for some fast‑fashion platforms). (businessinsider.com)

If you want, tell me what type of items (cheap basics, mid‑market brands, designer, local labels) you’re after and I’ll recommend the single best place and which promos to watch for.