PlugLimit is using Redis Lua scripting to provide rate-limiting functionality for web applications based on a Plug library. Salient Redis Lua scripting feature is a race conditions resiliency which makes it a recommended solution for distributed systems (e.g.: Phoenix servers swarm behind a round robin load-balancer).

PlugLimit provides two built-in rate limiters: fixed window and token bucket. Custom rate limiters can easily be added as a user defined Redis Lua scripts.

https://github.com/Recruitee/plug_limit