"Free" comes with a hidden engineering bill
Dify is Apache 2.0 licensed. You can clone it, self-host on your own Kubernetes cluster, and pay $0 in license fees — a genuine advantage for teams with infrastructure and compliance requirements that forbid SaaS. But the platform still needs to be installed, upgraded, monitored, and scaled. The industry rule of thumb is that every self-hosted OSS platform consumes 0.25–1.0 FTE of engineering time per year.
rpa-automate bundles the platform, the build, and ongoing management into a fixed monthly fee. If you don't have the engineering bandwidth to run a platform, the managed model is typically 3–5× cheaper loaded than self-hosting an OSS alternative.