Fission vs OpenFaaS: What are the differences?
Fission: Serverless Functions as a Service for Kubernetes. Write short-lived functions in any language, and map them to HTTP requests (or other event triggers). Deploy functions instantly with one command. There are no containers to build, and no Docker registries to manage; OpenFaaS: Serverless Functions Made Simple for Kubernetes and Docker. Serverless Functions Made Simple for Docker and Kubernetes.
Fission and OpenFaaS belong to "Serverless / Task Processing" category of the tech stack.
Fission and OpenFaaS are both open source tools. It seems that OpenFaaS with 14.8K GitHub stars and 1.17K forks on GitHub has more adoption than Fission with 4.47K GitHub stars and 399 GitHub forks.