Recommendations:

Unidos Tulum (volunteer organization)
https://www.instagram.com/unidostulum/?hl=de

Posada Margherita (beach hotel and restaurant)
https://www.posadamargherita.com

Yoga Shala (jungle side beach hotel)
https://www.yogashalatulum.com/en

Olas Tulum (environmentally conscious beach hotel)
https://olastulum.com

La Tulumeña (boutique hotel in town)
https://latulumena.com