APISIX vs Scalar

Apache APISIX is an open-source, high-performance API gateway and ingress controller that provides load balancing, rate limiting, authentication, and observability for API traffic. It supports dynamic routing configuration via an admin API without requiring restarts. APISIX is built on Nginx and LuaJIT with a plugin architecture supporting over 80 built-in plugins.

Scalar is Open-source API documentation and testing platform that generates modern interactive docs from OpenAPI specs.. It is available under a freemium model. This tool falls under the api tools category.