Fonts that go with Source Serif 4
Of the 10,927 home pages that load Source Serif 4, 18% also load Inter and 9.5% Source Sans 3. Source Serif 4 meets 48 fonts on 50 sites or more. Weighed against how common each font is, Source Sans 3 comes with it most: on 1,041 sites, where chance would give 56.
Fonts on the same home page, not which one sets the headings · HTTP Archive , 1 September 2026
01 / Set together
How the pairs look
Each font drawn from its own outlines, one as a heading and the other as text, then the other way round: the crawl does not say which sets the headings.
Source Serif 4 + Inter
2,014 sites · 1.8× chance
Heading · Source Serif 4
Source Serif 4Text · Inter
Heading · Inter
InterText · Source Serif 4
Source Serif 4 + Source Sans 3
1,041 sites · 19× chance
Heading · Source Serif 4
Source Serif 4Text · Source Sans 3
Heading · Source Sans 3
Source Sans 3Text · Source Serif 4
Source Serif 4 + IBM Plex Mono
365 sites · 13× chance
Heading · Source Serif 4
Source Serif 4Text · IBM Plex Mono
Heading · IBM Plex Mono
IBM Plex MonoText · Source Serif 4
02 / Most often
Used most with Source Serif 4
The share of its 10,927 home pages that load each font too, and how many times as often as chance would have it: 1× is chance.
- Inter18%2,014 sites · 1.8× chance
- Source Sans 39.5%1,041 sites · 19× chance
- Roboto6.2%679 sites · 0.3× chance
- Open Sans6%660 sites · 0.3× chance
- Playfair Display4.8%521 sites · 1.8× chance
- JetBrains Mono4.5%497 sites · 9.1× chance
- DM Sans4.1%446 sites · 2.1× chance
- Montserrat4%441 sites · 0.3× chance
- Poppins3.6%396 sites · 0.3× chance
03 / Beyond chance
Used with it beyond chance
Weighed against how common each font is: the sites that load both, against those that would if every site picked its fonts at random, each as often as sites use it. From 50 sites, and not one theme copied.
- Source Sans 319×1,041 sites, where chance gives 56
- IBM Plex Mono13×365 sites, where chance gives 29
- JetBrains Mono9.1×497 sites, where chance gives 55
- Geist Mono5.4×83 sites, where chance gives 15
- Hanken Grotesk4.2×70 sites, where chance gives 17
- IBM Plex Sans3.8×246 sites, where chance gives 66
- Geist3.7×128 sites, where chance gives 35
- Public Sans3.6×146 sites, where chance gives 41
- Bricolage Grotesque2.8×59 sites, where chance gives 21
04 / Trios
Trios with Source Serif 4
The two fonts most used with it as a set of three, each two of the three together more often than chance would have them.
05 / Questions
Pairing Source Serif 4
Answered from HTTP Archive’s crawl of 1 September 2026 and each font’s licence
What font goes with Source Serif 4?
On the 10,927 home pages that load Source Serif 4 (HTTP Archive, September 2026), the fonts loaded most often with it are Inter (2,014 sites, 18% of them), Source Sans 3 (1,041) and Roboto (679). They are on the same page: the data does not say which one sets the headings.
What fonts pair well with Source Serif 4?
Weighed against how common each font is, sites choose Source Sans 3 with Source Serif 4 most: 19× as often as chance would have it, on 1,041 sites where chance gives 56. Then IBM Plex Mono (13×) and JetBrains Mono (9.1×).
What three fonts go with Source Serif 4?
197 sites load Source Serif 4 with Inter and JetBrains Mono, each two of the three together more often than chance would have them. Next come IBM Plex Mono and IBM Plex Sans, on 76 sites.
Can I use Source Serif 4 and Source Sans 3 together for free?
Yes: both are free, commercial work included. Source Serif 4 and Source Sans 3 are both under the SIL Open Font License. Each font’s page says what its licence allows.