What fonts does Proton use?
Measured from the captured homepage: Proton Serif for headings and Proton Sans for body copy.
Open full Proton reference →Observed typography
- Heading font
- Proton Serif
- Body font
- Proton Sans
- System
- Two-family hierarchy
How the page is built
Proton's captured homepage has 65 sections and 9 inner pages.
- 25 content
- 15 features
- 9 statement
- 6 about
- 4 cta
- 2 blog
- 1 footer
- 1 hero
- 1 showcase
- 1 testimonials
Other sites that use this pair
No other captured site in this library uses this same pair of fonts.
Captured colors
The captured homepage uses these 4 colors, in capture order.
- #6d4aff
- #ffffff
- #4b5563
- #372580
Styles recorded: Light, Colorful, Serif.
Same category, same heading font
0 of the 90 other captured Technology sites in this library use Proton Serif for headings.
Proton's website font choices
Captured September 21, 2026. Read it with the full reference, where the palette, section order and responsive views sit next to the type.
A single family or a two-font system?
Proton pairs Proton Serif for headings with Proton Sans for body copy.
Compare it across the library
See the website font trends and the font pairing examples.
Proton fonts — FAQ
What font does Proton use?
Proton uses Proton Serif for headings and Proton Sans for body copy in the captured homepage.
Is Proton Serif free to use?
Check the foundry license for Proton Serif before shipping it. This page records what appeared on Proton's site and grants no reuse rights.
What colors and sections were captured for Proton?
4 colors (#6d4aff, #ffffff, #4b5563, #372580) and 65 homepage sections, with 9 inner pages.
Which other sites use Proton Serif and Proton Sans?
No other captured site in this library uses this same pair of fonts.
Fonts come from the rendered capture and may change when the site does. Library methodology