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Initially developed in 2009 by Salvatore Sanfilippo, who is known in the tech community as Antirez, Redis began as a passion project to create a fast, lightweight database accessible to anyone for free. Its simplicity and speed allowed it to rapidly gain traction among startups and tech giants alike, becoming a cornerstone technology on the internet. Redis's versatility enabled it to be used for caching, storage, message queues, full-text search, analytics, time series, and more.