Shop App is a US-based aggregator of e-commerce stores built on Shopify, which allows shoppers to discover new products and purchase them store by store.

• Fees: Shop App is free and directly integrated with Shopify.
  

Agora allows shoppers to search, compare and purchase products sold on stores from multiple e-commerce platforms through a single check-out.

• Fees: Agora is free to join for Shopify, WooCommerce, Wix, and Squarespace sellers. We do not charge any fees related to listing or selling products. We offer upgrades to paid subscriptions (starting at $99 per month) to increase views and sales, along with Boost pay-per-click advertising options.
  

‍Etsy is the world's largest handmade and crafts marketplace, famous for its locally produced products.

• Fees: Etsy charges 20 cents per product listings, which can be waived on their pro subscription for $10 a month. They also charge 6.5% referral and payment fees for each sale. Further information here.
  

Target is one of the U.S's largest retail corporation of discount stores and hypermarkets. Its online platform, Target plus marketplace (the main focus of this comparison), allows approved sellers in the U.S. to showcase their products digitally.

• Fees: Target has no membership or product listing fees. They charge a referral fee varying between 5% and 15% depending on the product category. Further information here.
  

‍Walmart is one of the U.S's largest retail corporations. Its online platform, Walmart marketplace (the main focus of this comparison), allows sellers in the U.S. to showcase their products digitally.

• Fees: Walmart has no membership or product listing fees. They charge a referral fee varying between 6% and 15%, depending on the product category. Further information here.
  

TikTok Shop is Tik Tok's new shopping feature and integrations for small stores. Tik Tok Shop is currently an invitation-only beta.

• Fees: TikTok Shop has no membership or product listing fees. They charge a referral fee varying between 6% and 15% depending on the product category. Further information here.
  

Amazon is the world's largest marketplace and leader in shoppers, products and online sales.

• Fees: Amazon is free to join and offers a paid subscription ($39/ month) to remove a fixed $0.99 referral fee per sale. They also charge an additional 8% to 15% per product sold. Exact fee percentage depends on product category and item value. Further information here.
  

eBay is the world's largest peer-to-peer marketplace, famous for its auction model.

• Fees: eBay offers 250 listings free monthly and membership fees up to $2,999 for full integrations, unlimited listings and custom packs. They also charge an additional 8% to 15% per product sold. Exact fee percentage depends on product category and item value. Further information here.