Tachyons is a functional CSS framework that enables rapid and consistent development of responsive user interfaces in an efficient and maintainable way. It is built around the concept of atomic design, providing a library of small, single-purpose classes that can be easily composed to build complex components.
@stitches/core is a relatively newer package and may have a smaller user base compared to tachyons. Tachyons, on the other hand, has been around for a longer time and has gained popularity in the CSS utility space. Both packages have their own community following.
Tachyons is designed to be small and lightweight, with a focus on minimal CSS footprint. It provides a set of predefined utility classes which can be used to compose styles. @stitches/core, being a CSS-in-JS solution, might introduce additional bundle size depending on your setup and usage.
Tachyons has a relatively low learning curve as it provides a set of predefined utility classes that can be easily understood and used. @stitches/core, being a CSS-in-JS solution, might have a steeper learning curve for developers who are not familiar with CSS-in-JS concepts.
Tachyons has a well-established community with a large number of contributors and a wide range of resources available. @stitches/core is newer in comparison and might have a smaller community support, but it is actively maintained and growing.