Kong vs Varnish: What are the differences?
What is Kong? Open Source Microservice & API Management Layer. Kong is a scalable, open source API Layer (also known as an API Gateway, or API Middleware). Kong controls layer 4 and 7 traffic and is extended through Plugins, which provide extra functionality and services beyond the core platform.
What is Varnish? High-performance HTTP accelerator. Varnish Cache is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. Varnish Cache is really, really fast. It typically speeds up delivery with a factor of 300 - 1000x, depending on your architecture.
Kong belongs to "Microservices Tools" category of the tech stack, while Varnish can be primarily classified under "Web Cache".
"Easy to maintain" is the primary reason why developers consider Kong over the competitors, whereas "High-performance" was stated as the key factor in picking Varnish.
Kong and Varnish are both open source tools. It seems that Kong with 22.2K GitHub stars and 2.71K forks on GitHub has more adoption than Varnish with 908 GitHub stars and 216 GitHub forks.
According to the StackShare community, Varnish has a broader approval, being mentioned in 1003 company stacks & 135 developers stacks; compared to Kong, which is listed in 50 company stacks and 13 developer stacks.
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