posthog.com draws its headings and body text in RoundHog and its code in Source Code Pro. It uses 2 fonts in all. We measured it on October 21, 2026.
The fonts posthog.com draws
| Font | Used for | Share of its custom-font text | Licence | How common |
|---|---|---|---|---|
| RoundHog | Headings, Body text | 96.6% | Not verified as obtainable | – |
| Source Code Pro | Code | 3.4% | Open source | 3 of 407 sites (rank =22) |
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?
- RoundHog: we could not verify that this typeface can be licensed, so we neither recommend it nor link a source.
- Source Code Pro is open source and free to use, including commercially. Get it from Google Fonts.
posthog.com among developer tools and infrastructure sites
posthog.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 posthog.com use?
posthog.com uses one family, RoundHog, 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
- react.dev Source Code Pro
- supabase.com Inter, Manrope, Source Code Pro
- algolia.com Sora, Inter
- angular.dev Inter, DM Mono
- astro.build Obviously, Inter, MD IO
- auth0.com Aeonik, Aeonik Mono
See the fonts on all 407 sites.
FAQ
What font does posthog.com use?
posthog.com draws its headings and body text in RoundHog and its code in Source Code Pro. It uses 2 fonts in all: RoundHog, Source Code Pro. We measured it on October 21, 2026.
Is RoundHog free?
We could not verify that RoundHog can be licensed, so we do not state a licence.
What font pairing does posthog.com use?
One family, RoundHog, for both headings and body text.
Can I use the same fonts as posthog.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 posthog.com. Each font's licence is on this page, from its source.
How do you know which font posthog.com uses?
We opened posthog.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.