Happy to help you. In terms of features you can see a list of CE/EE features here. Besides that, Kong has 60+ plugins both available out of the box or in the community (you can find them on GitHub) that you can easily add via the Admin API (which of course can be integrated with CI/CD workflows), or you can use the GUI. Essentially Kong is a full-cycle API management solution, fast and extensible.
Kong can work as an Ingress for external/internal traffic (north-south traffic) or in a Mesh (preview feature) for Microservices in east-west traffic, in centralized and decentralized modes with configurable data planes.
Lua was chosen for its great performance. As a matter of fact NGINX + Lua process 10% of the global internet traffic (CloudFlare for example is built on the same stack). We decided to use the same technology and its speed/performance/stability to build Kong, besides the fact Lua is very easy to learn.
Because of this, as you probably noticed, Kong is also the most popular OSS API Gateway in the market, with a global community and enterprise customer base. Kong CE is being executed in over 300,000 running instances per month while Kong EE is adopted in the Top Global 5000 with SLAs that can, for our top customers, go down to 5/10 minutes. Among our customers we work with Top Fortune 50 organizations in a diverse set of industries (technology, telecommunications, governments, retail, travel, automation, etc) in a large variety of use-cases and in every world region (APAC, EMEA, Americas).
Kong is the fastest gateway in every benchmark, with large mission critical use-case up to 1M requests per second, platform agnostic, lightweight and if you are using containers with good support for the most popular containerization platforms (Kubernetes, DC/OS, etc). It’s one of the most downloaded official images on Docker with 15M+ downloads. Users sometimes write about Kong vs other gateways, BBVA (a large bank) also wrote one against Tyk: https://www.bbva.com/en/api-gateways-kong-vs-tyk/
There is much more to say, if you have more questions or want to learn more about EE + Support + Pricing please contact us at https://konghq.com/request-demo/ - I don’t know where your company is located but we have a professional global Support, Customer Success and Solution Architect teams that can help you as part of the standard process. Our HQ is in San Francisco.
Hope this helps!