Free
Google Sans
Open licence
Competent fonts
Capable and well-made without showing off.
6 fonts
Competent fonts look capable without showing off. Well drawn, well spaced workhorses for products, documentation and professional services.
Free
Noto Sans Thai
Free
Krub
Free
IBM Plex Sans Thai
Free
Noto Sans Thai Looped
Free
IBM Plex Sans Thai Looped
FAQs
What makes a font look competent?
Consistent proportions, a full set of weights and careful spacing. Inter, Roboto and Source Sans are textbook examples.