Ten years ago, Redis was introduced as a key-value store with complex types and a module system. Its creator Salvatore Sanfilippo (a.k.a. antirez) aimed to support more complex data structures from the beginning. The first post about Redis on Hacker News was shared by David Welton (a.k.a. davidw), followed by Ezra Zygmuntowicz (a.k.a. ezmobius, RIP) who encouraged Salvatore and implemented the first Ruby client library for Redis. This helped spread Redis among Ruby on Rails developers, including Twitter, and eventually made it a popular add-on for Heroku developers. The early adopters of Redis played an essential role in its growth as an open source community.