The typeface on posthog.com is IBM Plex Sans Variable, Source Code Pro and Charter, loaded across 50 @font-face declarations. Every font family, weight and source on this page is read straight from the live CSS — no image guessing, no machine learning, just the rules the browser used.
Primary font
IBM Plex Sans Variable
Total weights
5
@font-face
50
Source
Mixed
IBM Plex Sans Variable
Custom web font
The quick brown fox jumps over the lazy dog
Weights loaded (1)
100 700Typography sets the voice of a brand
CSS to use IBM Plex Sans Variable
font-family: 'IBM Plex Sans Variable', Georgia, 'Times New Roman', serif;
font-family: Arial, Georgia, 'Times New Roman', serif;
Similar fonts
InterDM SansRoboto
Used by 4 selectors on the page
Impact
System font
The quick brown fox jumps over the lazy dog
Weights loaded (1)
400Typography sets the voice of a brand
CSS to use Impact
font-family: Impact, Georgia, 'Times New Roman', serif;
Similar fonts
InterManropeDM Sans
Used by 4 selectors on the page
Comic Sans MS
System font
The quick brown fox jumps over the lazy dog
Weights loaded (1)
400Typography sets the voice of a brand
CSS to use Comic Sans MS
font-family: 'Comic Sans MS', Georgia, 'Times New Roman', serif;
Similar fonts
InterManropeDM Sans
Used by 1 selector on the page
How posthog.com loads its fonts
Get Font Info inspected the homepage of posthog.com and parsed 0 stylesheets totalling 0 KB. Inside those stylesheets we found 50 @font-face declarations — the rules a browser uses to download and register a custom typeface. The primary typefaces are served from mixed, and 34 CSS rules reference them across the page.
Check the font on a specific element
Open the live inspector and hover any text on posthog.com to see the exact font, weight, size and line-height for that element.
posthog.com uses IBM Plex Sans Variable, Source Code Pro and Charter as its primary typefaces. These fonts are loaded from a self-hosted webfont, an unknown source and the operating system and applied across 34 CSS rules on the homepage.
Where does posthog.com load its fonts from?
posthog.com loads its fonts from a self-hosted webfont, an unknown source and the operating system. Get Font Info detected 50 @font-face declarations across 0 stylesheets on the live page.
What weights of IBM Plex Sans Variable does posthog.com use?
posthog.com loads IBM Plex Sans Variable in 5 weights: 100 700, 400, 500, 600, 700. If you want to match the look, request the same weights from your font host so you only ship what's actually used.
Can I use the same font as posthog.com on my website?
Yes — once you know the font name, you can load it from the same source. If IBM Plex Sans Variable isn't a fit (licensing, weight selection, look-and-feel), close alternatives include Inter, Source Sans 3 and Manrope. Use the CSS snippet on this page as a starting point.
Is the font on posthog.com free to use?
These fonts are self-hosted webfonts. They may be licensed commercially from a type foundry, custom-made for the brand, or freely available — you would need to identify the typeface and check its license at the foundry.
See fonts used by other sites
Compare the typography on posthog.com with how other well-known sites load and use their fonts.
This page lists the fonts loaded by the homepage of posthog.com. Get Font Info reads the live CSS — every @font-face rule, every font-family declaration — so you see the exact fonts the browser used, not an image-based guess.