For us, FOSS is the start of the funnel for our SaaS. Somewhat in-between the "hosted version" and the "premium features" buckets, but in separate projects. We employ the two core maintainers of Storybook (one of the most popular FOSS JavaScript projects) who work on it full-time. The rest of us build Chromatic, a SaaS that offers features on top of Storybook, and we occasionally work on Storybook too. Storybook is a…
I thin Hashicorp does something similar on top of slect core features (which tend to eventually end up on the free and open version eventually, which is funny because the enterprise customers end up being beta testers due to HC's habit of releasing features in a half-working state).