欧易（OKX），是数字货币交易平台之一，中文名于2021年2月正式启用。自2017年5月31日创办以来，为用户提供币币、杠杆、期权/交割/永续合约、DEX交易、余币宝、DeFi挖矿、借贷等多元的产品矩阵，已经覆盖200余个国家和地区，拥有千万级用户量。
2021年10月13日，OKX发布了《关于中国大陆地区监管政策的通知》，表示自2017年9月开始就把业务重心转到国际市场，不针对中国大陆市场进行推广和服务，其网站在中国大陆无法访问，App也下架了所有的中国大陆地区的应用市场。
2022年1月18日，加密货币交易所欧易发布公告，欧易OKEx更名为欧易OKX。
2018年1月20日OKEx正式推出平台币OKB，OKB是由OK Blockchain 基金会发行，由OKEx研发人员设计并推出。OKB基于区块链技术，采用通证经济模型，将创新型数字资产项目和OKEx高端用户、投资人等进行连接，更好地打造OKEx生态闭环。
2018年6月19日OKEx推出开放交易所共赢计划，后更名为OKEx云平台，OKEx云平台计划把OKEx长期以来在数字资产交易领域积累的撮合系统、柜台系统、冷钱包系统、热钱包系统、资金清算系统、全球多语言的客服能力、全球客户身份识别和反洗钱系统等开放给“OK伙伴”， 打造一批自治的、高效的、透明的数字资产交易平台。OKEx云平台，已上线交易服务商超过120余家。
2018年7月2日注册地由伯利兹迁至马耳他，并在马国成立办公室及招揽人才。
2018年11月6日余币宝产品上线。余币宝是一款可随存随取的币币增值产品。
2020年2月10日OKEx公链OEC测试网上线。
2020年6月， OEC首届“黑客松”大赛正式启动，优秀参赛团队最高可获得价值5000美元的OKB奖励。
2019年9月5日，OKEx联合新浪财经出品区块链系列科普视频《OK区块链60讲》，针对区块链零基础用户，从概念、技术、应用等角度，通过5大板块，60个知识点，科普了区块链概念。
2021年2月，OKEx启用中文名欧易，以“让个体价值更被尊重”的全新使命，“让全球一亿人拥有数字资产”为愿景，开启全球化战略布局。
2021年3月11日，欧易（OKEx）的官方微博账号被封
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