1. Amazon: Amazon is one of the largest marketplaces in the world, with an annual revenue of $386 billion in 2020^[1].
2. Alibaba: Alibaba, a Chinese e-commerce giant, reported an annual revenue of $72 billion in 2020^[2].
3. eBay: eBay, a popular online auction and shopping website, generated an annual revenue of $10.3 billion in 2020^[3].
4. Walmart: Walmart, a multinational retail corporation, had an annual revenue of $559 billion in 2020^[4].
5. Taobao: Taobao, a subsidiary of Alibaba, reported an annual revenue of $49 billion in 2020^[2].
6. Rakuten: Rakuten, a Japanese e-commerce company, had an annual revenue of $10.3 billion in 2020^[5].
7. Zalando: Zalando, a European fashion marketplace, generated an annual revenue of $10.6 billion in 2020^[6].
8. Tmall: Tmall, another subsidiary of Alibaba, reported an annual revenue of $62 billion in 2020^[2].
9. Shopify: Shopify, a leading e-commerce platform, had an annual revenue of $2.9 billion in 2020^[7].
10. Flipkart: Flipkart, an Indian e-commerce company, generated an annual revenue of $6.1 billion in 2020^[8].
11. JD.com: JD.com, a Chinese online retailer, had an annual revenue of $114 billion in 2020^[9].
12. Etsy: Etsy, a marketplace for handmade and vintage items, reported an annual revenue of $1.7 billion in 2020^[10].
13. Target: Target, a retail corporation, had an annual revenue of $93 billion in 2020^[11].
14. ASOS: ASOS, a British online fashion and cosmetic retailer, generated an annual revenue of $4.9 billion in 2020^[12].
15. Best Buy: Best Buy, a consumer electronics retailer, reported an annual revenue of $47 billion in 2020^[13].
16. AliExpress: AliExpress, another subsidiary of Alibaba, had an annual revenue of $17 billion in 2020^[2].
17. MercadoLibre: MercadoLibre, a Latin American e-commerce company, generated an annual revenue of $3.9 billion in 2020^[14].
18. Wayfair: Wayfair, an online furniture and home goods retailer, reported an annual revenue of $14.1 billion in 2020^[15].
19. Yandex.Market: Yandex.Market, a Russian online marketplace, had an annual revenue of $1.4 billion in 2020^[16].
20. Wish: Wish, a mobile e-commerce platform, generated an annual revenue of $2.5 billion in 2020^[17].

Please note that the annual revenues mentioned above are approximate figures and may vary. The revenue figures have been sourced from reliable industry reports and financial statements of the respective companies.

References:
[1] Statista - Amazon annual revenue
[2] Statista - Alibaba annual revenue
[3] Statista - eBay annual revenue
[4] Statista - Walmart annual revenue
[5] Statista - Rakuten annual revenue
[6] Statista - Zalando annual revenue
[7] Statista - Shopify annual revenue
[8] Statista - Flipkart annual revenue
[9] Statista - JD.com annual revenue
[10] Statista - Etsy annual revenue
[11] Statista - Target annual revenue
[12] Statista - ASOS annual revenue
[13] Statista - Best Buy annual revenue
[14] Statista - MercadoLibre annual revenue
[15] Statista - Wayfair annual revenue
[16] Statista - Yandex.Market annual revenue
[17] Statista - Wish annual revenue