METAsrc was originally created to help League of Legends players Zarvax and Mantha Bear excel in their ranked 3v3 matches. Given that The Twisted Treeline is far less popular than Summoner's Rift, they had trouble finding information about the best 3v3 champion builds, tier lists, and tools. So, they decided to create champion pages with item builds and counters, tier lists, and counter picker tools for The Twisted Treeline based on game statistics from the Riot API. Soon enough, they decided this type of data would also be great to provide for Summoner's Rift, and that everyone should have access to this useful information! From that point, they have continued the development of METAsrc by adding the ARAM mode (as well as Dominion until it was no longer supported by Riot), in addition to expanding to include data from the EUW and EUNE regions. They have also expanded the data available to include role-specific data, masteries, and runes, and continue development daily. Many more features are planned!
We hope you find our site useful.