Here are the top e‑commerce platforms to consider if you’re selling in Singapore, with short pros/cons and who each is best for.

1. Shopee (marketplace)

• Why: Largest SEA marketplace with huge traffic and strong promotions/marketing support for sellers. Good for fast customer acquisition and lower setup effort. (investors.com)
• Pros: Massive audience, local payments & logistics integrations, aggressive marketing tools.
• Cons: High competition, price-driven shoppers, platform fees and promotional costs can add up.
• Best for: Small/medium brands and sellers who want volume and discoverability fast.

2. Lazada (marketplace)

• Why: Major SEA marketplace with advanced seller tools, fulfilment (LEX) and campaigns for visibility. Good reach in Singapore and region. (webflow.aspireapp.com)
• Pros: Strong regional logistics options, built-in analytics, seller support programs.
• Cons: Commission/fee structure and campaign costs — read current seller fee details before scaling. (emma.com.sg)
• Best for: Brands that want regional exposure and access to marketplace fulfilment.

3. Shopify (hosted store / omnichannel)

• Why: Best‑in‑class hosted e‑commerce platform for building branded stores with omnichannel/POS support in Singapore. Flexible, many apps, scalable. (Shopify.com)
• Pros: Full control of branding/checkout, strong app ecosystem, integrated payments (Shopify Payments) and POS.
• Cons: Monthly fees + payment processing costs; you must drive your own traffic (unless you also use Shopify’s marketplace/channel apps).
• Best for: Brands that want a branded store, higher margins, and long‑term control.

4. SHOPLINE (regional / Singapore‑focused hosted store)

• Why: Singapore‑friendly hosted platform with pricing and built‑in integrations aimed at SEA merchants (local payment methods, TikTok/Lazada/Shopee channels). (SHOPLINE.sg)
• Pros: Localised plans, integrated social commerce and marketplace publishing, POS support.
• Cons: Less global app ecosystem than Shopify; compare rates/features vs Shopify for scaling.
• Best for: Singapore/SEA sellers who want an easier localised setup than global SaaS.

5. Carousell (classifieds / recommerce marketplace)

• Why: Leading classifieds and recommerce app in Singapore — great for secondhand, preloved, and C2C/B2C sellers. Newer features add cart/checkout and official delivery. (press.Carousell.com)
• Pros: Low barrier to list, strong local user base, integrated delivery and buyer protection options.
• Cons: Not ideal for full catalog merchants looking for a brand storefront; mostly recommerce/used goods audience.
• Best for: Preloved items, small sellers, or businesses testing product-market fit locally.

6. WooCommerce / Magento / Adobe Commerce (self‑hosted)

• Why: Open‑source options for full control (WooCommerce on WordPress for smaller sellers; Magento/Adobe Commerce for larger/enterprise).
• Pros: Highly customizable, no recurring platform subscription (but hosting/dev costs apply).
• Cons: Requires technical resources for setup, security, maintenance and local integrations.
• Best for: Businesses needing heavy customization, complex B2B flows, or full ownership of data.

7. Qoo10 (marketplace) — with caveats

• Why: Popular Singapore marketplace historically used by many sellers. However, review operational stability and payment reliability before committing (there have been notable payment issues reported in the region in 2024). (reuters.com)
• Best for: Sellers who want additional marketplace exposure but only after verifying current vendor/payout track record.

How to choose (quick checklist)

• Audience vs control: Marketplaces (Shopee, Lazada, Carousell) = traffic + convenience; Hosted stores (Shopify, SHOPLINE) = control + branding.
• Fees & margins: Compare commissions, listing fees, monthly SaaS, and payment processing fees (Shopify/SHOPLINE list their Singapore plans). (Shopify.com)
• Logistics & payments: Check local PSPs (Stripe, PayPal, eNets, PayNow integrations) and fulfilment options (self‑fulfilment, LEX, marketplace fulfilment).
• Omnichannel needs: If you sell offline/POP‑ups, choose a platform with POS integration (Shopify, SHOPLINE). (Shopify.com)

Recommendation by seller type

• Hobby / test seller: Carousell or Shopee (low setup). (apps.apple.com)
• Small brand / D2C: Shopify or SHOPLINE (branded store + social channels). (Shopify.com)
• Large/enterprise or multi‑market: Shopify Plus, Adobe Commerce (Magento), or marketplace + direct store combo. (360and5.com)
• Resale / pre‑owned luxury: Carousell (Carousell Luxury) or consignment channels. (press.Carousell.com)

If you tell me which type of products you sell (physical goods vs digital, new vs preloved), your monthly order volume goal, and whether you need POS/physical stores, I can recommend the single best platform and an estimated cost comparison for Singapore.