San Cristóbal is a good place to drink and buy coffee from Chiapas, but not every café tells you the same amount about origin, producers or processing. If traceability and coffee craft matter, start with projects that publish how they work with growers and coffee quality.
Quick comparison
Specialty coffee research + education: Cafeología
Traceable Los Altos coffee + multiple brew methods: XUT Café de Chiapas
Local roasting + organic coffee from producer families: Carajillo Expendio
Direct connection to Tsotsil and Tseltal producer families: Cafetería Unión Majomut
The list focuses on places whose current operator-owned information explains coffee origin, producer relationships or specialty methods.
Cafeología
Cafeología focuses on specialty coffee as a professional or educational field, not only a drink. Its official site describes its mission as research, education and development in specialty coffees, with its base in San Cristóbal.
Cafeología also runs training and coffee programs tied to growers, processing, sensory evaluation and extraction. Course dates are separate from normal café visits, so check the current program if that is the reason you are going.
XUT Café de Chiapas
XUT Café de Chiapas combines an expendio and specialty bar in Barrio de Guadalupe. Its current official site says its coffees are grown by producer families in Los Altos de Chiapas and selected with traceability and careful roasting.
The bar publishes multiple extraction methods including V60, Chemex, French press, espresso, Aeropress, siphon, Clever and Kalita. XUT is suited to comparing preparations rather than ordering only a standard espresso drink.