Are you inspired by the Pangeo.io geoscience software stack and want to help spread it to adjacent (or even far distant) areas of science? Tell them about SOSA: The Scalable Open-Source Analysis Stack. Most of the core tools used in Pangeo are completely general, by design, and together the domain-independent tools form a complete, flexible, and high-performance stack ready for doing science, engineering, and analysis at any scale from a laptop to a supercomputer. Here I will introduce the idea of SOSA, talk about the tools that make it up, and list 11 different characteristics of SOSA tools that make them good building blocks for constructing any scientific stack. Let's get the whole world of science on board with the core of Pangeo, so that these tools can be even more well supported and shared universally!