# Available Engines

- `hyper-express` (default)
  - Complete HTTP Server stack, including HTTP/2, SocketIO and Redis.
  - Uses [HyperExpress](https://github.com/kartikk221/hyper-express) framework

- `hyper-express-ng`
  - Uses [HyperExpress](https://github.com/kartikk221/hyper-express) as base, implements experimental features & stacks.

- `worker`
  - Enables a worker thread to handle requests on ICP