If you cannot afford the expensive license for the official Futura, there are excellent "Futura clones" or "Futura-inspired" fonts that are free for personal and commercial use via Google Fonts or open-source licenses.
Here is the critical legal disclaimer: In most jurisdictions, typefaces are protected as software or artistic works. Paul Renner’s design is over 95 years old, but the digital font files (PostScript, TrueType, OpenType) are owned by companies like Monotype, Linotype, or ParaType.
But if you are designing a logo for a paying client? Do the right thing. Buy the real license from MyFonts. You are paying for the heritage and the full international character set.
The family offers a nearly complete set of core Futura weights in a compact package that has been unofficially free for personal use for decades. For professional or commercial work, avoid legal ambiguity by using legitimate open-source geometric sans fonts like Jost or League Spartan . However, for vintage Unix desktop publishing nostalgia or personal projects, Futura TOT remains a usable, complete geometric sans-serif family.