proton.me draws its headings in ABC Arizona and its body text in Inter. It uses 2 fonts in all. We measured it on October 21, 2026.
The fonts proton.me draws
| Font | Used for | Share of its custom-font text | Licence | How common |
|---|---|---|---|---|
| Inter | Body text | 89.8% | Open source | 71 of 407 sites (rank 1) |
| ABC Arizona | Headings | 10.2% | Commercial | 2 of 407 sites (rank =29) |
Share is how much of the page’s custom-font text each font draws. System fonts and icon fonts are never counted. Each site was opened twice in a real browser and Chrome was asked which font file drew each piece of text. We count a font for a site only if both runs saw it and it drew at least 2% of the site’s custom-font text. The full method.
Can I use the same fonts?
- Inter is open source and free to use, including commercially. Get it from Google Fonts.
- ABC Arizona is sold under a commercial licence by Dinamo Typefaces. Licence it from Dinamo Typefaces; copying the file from a site that uses it is not a licence.
proton.me among saas and productivity sites
proton.me is one of the 44 saas and productivity sites we measured. Across them, Inter is the most used font you can get, on 14 of the 44 (32%). All the fonts saas and productivity sites use.
What pairing does proton.me use?
ABC Arizona for headings with Inter for body text does not repeat on another analyzed site, so there is no shared pairing to show. Pairings that do repeat.
Other saas and productivity sites we measured
- bamboohr.com Inter, Fields
- bitwarden.com Inter
- box.com Inter
- cal.com Cal Sans, Matter, Inter
- clickup.com Inter, Plus Jakarta Sans, Sometype Mono
- coda.io Inter, Calibre
See the fonts on all 407 sites.
FAQ
What font does proton.me use?
proton.me draws its headings in ABC Arizona and its body text in Inter. It uses 2 fonts in all: Inter, ABC Arizona. We measured it on October 21, 2026.
Is ABC Arizona free?
No. ABC Arizona is sold under a commercial licence by Dinamo Typefaces.
What font pairing does proton.me use?
ABC Arizona for headings and Inter for body text. It does not repeat on another analyzed site.
Can I use the same fonts as proton.me on my own site?
Only if the licence allows it. Free and open-source fonts can be used freely. Commercial fonts need your own licence, even though you can see the file on proton.me. Each font's licence is on this page, from its source.
How do you know which font proton.me uses?
We opened proton.me in a real browser and asked Chrome which font file drew each piece of text, twice in separate sessions. A font counts only if both runs saw it and it drew at least 2% of the site's custom-font text.
Can I check a different website?
Yes. Paste its address into the free font finder.