Helvetica with Helvetica Neue in action on brontidebg.com

.content-1 { font-family: Helvetica, sans-serif; font-size: 17.9286px; font-style: normal; font-weight: 400; letter-spacing: 0.268929px; line-height: 29.8214px; text-transform: none; color: #393838; }
.content-2 { font-family: HelveticaNeueLTStd-Roman, Helvetica, sans-serif, Arial; font-size: 0px; font-style: normal; font-weight: 400; letter-spacing: normal; line-height: 0px; text-transform: none; color: #393838; }
Helvetica is available from Fonts.com, Fontshop and MyFonts.

Helvetica Neue is available from MyFonts.
Found by @mikesten on 1 Apr 2018.

Liked by:
@mikesten @Joshua_D_

Helvetica with Helvetica Neue