Since Neo Sans is a proprietary font, you typically need to purchase a license from official distributors:

Designed by Sebastian Lester for Monotype in 2004, Neo Sans Pro is a futuristic, ultra-modern sans-serif known for its minimalist character structure and open letterforms. Its "Neo Sans Pro Light" weight is particularly popular for sleek, high-tech branding and editorial design. How to Get Neo Sans Pro Light Legally

Finding a can be challenging because the Neo Sans family is a premium typeface protected by copyright. While many sites claim to offer "free" downloads, these are often unauthorized and could expose your device to malware or your business to legal risks.