Alternative To Proxima Nova
I just had a studio design a website concept visual which used the Gotham font (also similar to Proxima Nova) and to officially use it on the website as a CSS font-family it would have to be purchased from. Sadly it wasn't within the projects budget so after searching and testing several alternatives from the web I managed to find a FREE version called Montserrat. It can be downloaded from here. I also found that the font Proxima Nova is another purchase only font which Montserra can be used for as a free alternative. J.cole 2018. 
Top 10 Proxima Nova & Gotham Alternatives. Think Proxima Nova and Gotham are both a bit overused? Then check out this list of 10 sturdy, no-frills, grotesque/geometric hybrids that share similar characteristics with Proxima Nova and Gotham but aren't used nearly as often. Just Say NOva—13 Proxima Nova Alternatives. Proxima Nova Type Specimen. It's no secret: web designers love Proxima Nova. And with good.
Alternative To Proxima Nova Free
Proxima Nova font matches - Libre Baskerville, Sanchez, Libre Baskerville, League Gothic. Certificat de cazier judiciar.
Google Alternative To Proxima Nova
Here is a visual comparison of all three fonts using the same font size and weight. You can see Montserrat at the top. Not only is Montserrat free, but it's one of Google's own web fonts so you can use it how you like on any website.