research · typography · 2026-09-28
The fonts YC startups use in 2026
Typefaces referenced in the CSS and Google Fonts links of 705 YC 2026 homepages. One count per site per family.
| Typeface | sites | share |
|---|---|---|
| Inter | 120 | 17.0% |
| JetBrains Mono | 35 | 5.0% |
| Geist | 30 | 4.3% |
| Geist Mono | 28 | 4.0% |
| IBM Plex Mono | 22 | 3.1% |
| Instrument Serif | 20 | 2.8% |
| DM Sans | 18 | 2.6% |
| Fragment Mono | 17 | 2.4% |
| Space Grotesk | 13 | 1.8% |
| Fraunces | 11 | 1.6% |
| Instrument Sans | 10 | 1.4% |
| Outfit | 9 | 1.3% |
What it means
Inter is on 120 sites — the default. What follows it is the real signal: JetBrains Mono, Geist Mono, IBM Plex Mono are all monospace, so the 2026 YC look is a neutral grotesk for headlines and a mono for anything that wants to feel technical. Serif display faces (Instrument Serif, Fraunces) are the minority position, and the easiest way to look different in a Demo Day scroll.
If you're choosing a typeface for a startup
- Pick a display face nobody in your batch is using; the body face matters less.
- A mono for numbers, code and labels reads as "technical" without saying it.
- Variable fonts keep the page light: the median YC homepage ships 15 script tags already.
Method
From the YC 2026 homepage dataset. Families detected in font-family declarations, @font-face names and Google Fonts URLs; system stacks excluded. Self-hosted fonts with obfuscated names are under-counted.
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