fly.io draws its headings in P22 Mackinac Pro and its body text in Fricolage Grotesque. It uses 2 fonts in all. We measured it on October 21, 2026.
The fonts fly.io draws
| Font | Used for | Share of its custom-font text | Licence | How common |
|---|---|---|---|---|
| Fricolage Grotesque | Body text | 91.8% | Not verified as obtainable | – |
| P22 Mackinac Pro | Headings | 7.9% | Not verified as obtainable | – |
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?
- Fricolage Grotesque: we could not verify that this typeface can be licensed, so we neither recommend it nor link a source.
- P22 Mackinac Pro: we could not verify that this typeface can be licensed, so we neither recommend it nor link a source.
fly.io among developer tools and infrastructure sites
fly.io 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 fly.io use?
P22 Mackinac Pro for headings with Fricolage Grotesque for body text does not repeat on another analyzed site, so there is no shared pairing to show. Pairings that do repeat.
Other developer tools and infrastructure sites we measured
- algolia.com Sora, Inter
- angular.dev Inter, DM Mono
- astro.build Obviously, Inter, MD IO
- auth0.com Aeonik, Aeonik Mono
- aws.amazon.com Amazon Ember, Amazon Ember Mono
- bun.sh Martian Mono, Archivo
See the fonts on all 407 sites.
FAQ
What font does fly.io use?
fly.io draws its headings in P22 Mackinac Pro and its body text in Fricolage Grotesque. It uses 2 fonts in all: Fricolage Grotesque, P22 Mackinac Pro. We measured it on October 21, 2026.
Is P22 Mackinac Pro free?
We could not verify that P22 Mackinac Pro can be licensed, so we do not state a licence.
What font pairing does fly.io use?
P22 Mackinac Pro for headings and Fricolage Grotesque for body text. It does not repeat on another analyzed site.
Can I use the same fonts as fly.io 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 fly.io. Each font's licence is on this page, from its source.
How do you know which font fly.io uses?
We opened fly.io 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.