Mostly Metrics is a two-to-three-times-a-week newsletter from CJ Gustafson covering SaaS metrics, finance and business models. CJ Gustafson’s newsletter explaining SaaS metrics, finance, benchmarking, business models, and operating concepts for founders and technology executives.
It is aimed at executives. It is published on Substack and offers free issues with a paid tier. Public sources put its audience in the 50K–100K subscriber range.
No public sponsorship programme for Mostly Metrics was found at the time of research. Listing details were last verified in September 2026.