Research product
Open GTM Index
A transparent guide to open-source sales and marketing software.
What it is
Open GTM Index helps people compare open-source alternatives to common sales, marketing, analytics, automation, and support tools. The rankings use public project facts and a documented scoring method, so each result can be checked instead of taken on trust.
The responsive site is built with TanStack Start, React, TypeScript, Vite, and Nitro. It presents category leaders, sortable rankings, licence details, replacement suggestions, and the score weights used in the research. The public repository also includes the source workbook and project metadata collected on 20 July 2026.