# Xianyu > Analysis by Optimly for Optimly AI Visibility, in the Optimly AI Brand Index. Last analyzed August 30, 2026. > Xianyu, also known as Idle Fish, is China's largest consumer-to-consumer (C2C) community and marketplace for second-hand and idle goods. Founded in 2014, it has expanded to empower users to share skills, interests, and experiences, offering services like product recycling, authentication, user ratings, and a community forum called 'Seafood Market'. It also quantifies carbon reduction for every transaction, promoting sustainable consumption. - Business Profile: https://optimly.ai/brand/xianyu - Publisher: Optimly (https://optimly.ai) - Dataset: Optimly AI Brand Index (https://optimly.ai/brand) - Official website: https://alibabagroup.com/ - Logo: https://logo.clearbit.com/alibabagroup.com - Slug: xianyu - Category: Online Resale Marketplaces - Last Analyzed: August 30, 2026 --- ## Full Details / RAG Data ### Overview Xianyu has a Business Profile in the Optimly AI Brand Index. Xianyu, also known as Idle Fish, is China's largest consumer-to-consumer (C2C) community and marketplace for second-hand and idle goods. Founded in 2014, it has expanded to empower users to share skills, interests, and experiences, offering services like product recycling, authentication, user ratings, and a community forum called 'Seafood Market'. It also quantifies carbon reduction for every transaction, promoting sustainable consumption. ### Metadata | Field | Value | |--------------|-------| | Name | Xianyu | | Slug | xianyu | | URL | https://optimly.ai/brand/xianyu | | Logo | https://logo.clearbit.com/alibabagroup.com | | Category | Online Resale Marketplaces | | Last Analyzed | August 30, 2026 | | Last Updated | 2026-08-30T08:32:04.821Z | ### Links - Canonical page: https://optimly.ai/brand/xianyu - Official website: https://alibabagroup.com/ - Publisher: https://optimly.ai - Dataset: https://optimly.ai/brand - JSON endpoint: /brand/xianyu.json - LLMs.txt: /brand/xianyu/llms.txt