auth0.com draws its headings and body text in Aeonik. It uses 2 fonts in all. We measured it on October 21, 2026.
The fonts auth0.com draws
| Font | Used for | Share of its custom-font text | Licence | How common |
|---|---|---|---|---|
| Aeonik | Headings, Body text | 92% | Commercial | 4 of 407 sites (rank =13) |
| Aeonik Mono | Smaller text | 8% | 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?
- Aeonik is sold under a commercial licence by CoType Foundry. Licence it from CoType Foundry; copying the file from a site that uses it is not a licence.
- Aeonik Mono is sold under a commercial licence by CoType Foundry. Licence it from CoType Foundry; copying the file from a site that uses it is not a licence.
Free fonts in a similar style
If you cannot license Aeonik, these free fonts are in the same style (sans serif) and real sites use them: Inter (71 sites), Roboto (12 sites), Open Sans (11 sites), Source Sans 3 (9 sites). A similar style is not the same typeface, so compare them side by side before you commit.
auth0.com among developer tools and infrastructure sites
auth0.com is one of the 62 developer tools and infrastructure sites we measured. Across them, Inter is the most used font you can get, on 25 of the 62 (40%). All the fonts developer tools and infrastructure sites use.
What pairing does auth0.com use?
auth0.com uses one family, Aeonik, for both headings and body text. So do 280 of the 407 sites we analyzed (69%). Pairings of two different fonts.
Other developer tools and infrastructure sites we measured
- okta.com Aeonik, Season Mix
- algolia.com Sora, Inter
- angular.dev Inter, DM Mono
- astro.build Obviously, Inter, MD IO
- aws.amazon.com Amazon Ember, Amazon Ember Mono
- bun.sh Martian Mono, Archivo
See the fonts on all 407 sites.
FAQ
What font does auth0.com use?
auth0.com draws its headings and body text in Aeonik. It uses 2 fonts in all: Aeonik, Aeonik Mono. We measured it on October 21, 2026.
Is Aeonik free?
No. Aeonik is sold under a commercial licence by CoType Foundry.
What font pairing does auth0.com use?
One family, Aeonik, for both headings and body text.
Can I use the same fonts as auth0.com 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 auth0.com. Each font's licence is on this page, from its source.
How do you know which font auth0.com uses?
We opened auth0.com 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.