writesonic.com draws its headings and body text in Roobert. That is the only custom font on the page. We measured it on November 4, 2026.
The fonts writesonic.com draws
| Font | Used for | Share of its custom-font text | Licence | How common |
|---|---|---|---|---|
| Roobert | Headings, Body text | 100% | Commercial | 6 of 845 sites (rank =21) |
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?
- Roobert is sold under a commercial licence by Displaay Type Foundry. Licence it from Displaay Type Foundry; copying the file from a site that uses it is not a licence.
Free fonts in a similar style
If you cannot license Roobert, these free fonts are in the same style (sans serif) and real sites use them: Inter (126 sites), Roboto (43 sites), Open Sans (26 sites), Geist (18 sites). A similar style is not the same typeface, so compare them side by side before you commit.
writesonic.com among ai sites
writesonic.com is one of the 62 ai sites we measured. Across them, Inter is the most used font you can get, on 10 of the 62 (16%). All the fonts ai sites use.
What pairing does writesonic.com use?
writesonic.com uses one family, Roobert, for both headings and body text. So do 567 of the 845 sites we analyzed (67%). Pairings of two different fonts.
Other ai sites we measured
- ai21.com Aeonik, Söhne, Inter
- anthropic.com Anthropic Sans Text, Anthropic Serif Text
- anyscale.com Geist Mono, Geist
- assemblyai.com UN 11 ST, Oceanic Text
- bolt.new Schibsted Grotesk
- character.ai Open Sans, At Hauss
See the fonts on all 845 sites.
FAQ
What font does writesonic.com use?
writesonic.com draws its headings and body text in Roobert. We measured it on November 4, 2026.
Is Roobert free?
No. Roobert is sold under a commercial licence by Displaay Type Foundry.
What font pairing does writesonic.com use?
One family, Roobert, for both headings and body text.
Can I use the same fonts as writesonic.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 writesonic.com. Each font's licence is on this page, from its source.
How do you know which font writesonic.com uses?
We opened writesonic.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.