OpenFaaS

Serverless on your own infrastructure, without the Knative complexity tax. OpenFaaS lets you deploy functions in any language on Kubernetes, Docker Swarm, or even standalone — and it actually prioritizes developer experience over enterprise architecture diagrams.

Knative is the more powerful, Kubernetes-native alternative with scale-to-zero and event-driven architecture. Fission and Kubeless are lighter options but have smaller communities. AWS Lambda is the commercial default, but vendor lock-in is total.

OpenFaaS wins on simplicity: write a function, build a container, deploy. The CLI is intuitive, the UI is clean, and you don't need to install five CRDs and three operators to get started. The template store covers most languages out of the box.

The catch: the license changed from MIT to a more restrictive model — check the current terms before building a commercial platform on it. Scale-to-zero requires OpenFaaS Pro (paid). And compared to Knative's event mesh, OpenFaaS event handling is basic. The project's momentum has slowed as Knative captured the enterprise crowd.