Install FontSwap
Inter vs Source Sans 3
Inter and Source Sans 3 are both freely available sans-serif fonts often used as alternatives to the same premium typefaces. Inter serves as a replacement for 93 premium fonts while Source Sans 3 covers 4. This comparison helps you pick between two strong open-source options.
Design DNA
Design overlap:33%
Inter
Source Sans 3
Highlighted traits are shared between both fonts
Visual Comparison
Inter
FreeAa Bb Cc 123
The quick brown fox jumps over the lazy dog
ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
0123456789 !@#$%^&*()
Source Sans 3
FreeAa Bb Cc 123
The quick brown fox jumps over the lazy dog
ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
0123456789 !@#$%^&*()
Feature Comparison
| Feature | Inter | Source Sans 3 |
|---|---|---|
| Type | Free | Free |
| Classification | sans-serif | sans-serif |
| Variable Font | Yes | Yes |
| Weights | Variable (100-900) | Variable (100-900) |
| Italics | Yes | Yes |
| License | OFL-1.1 | OFL-1.1 |
| Language Support | latin, latin-extended, cyrillic, cyrillic-extended, greek, greek-extended, vietnamese | latin, latin-extended, cyrillic, cyrillic-extended, greek, greek-extended, vietnamese |
| Source | Google Fonts | Google Fonts |
Best Use Cases
Fonts that establish strong brand identity with distinctive character and versat...
Typography suited for magazines, newspapers, and long-form content. Editorial fo...
Typography optimized for user interfaces, design systems, and digital products. ...
Typography for established businesses, enterprise software, and professional ser...
Typography for wayfinding, environmental graphics, and public signage. Signage f...
Typography for product packaging, labels, and consumer goods. Packaging fonts mu...
Typography for navigation systems, directional signage, and environmental graphi...
Typography for automotive brands, vehicle interfaces, and transportation design....
Typography for tech companies, software products, and digital innovation. Tech f...
Typography optimized for websites, landing pages, and web applications. Web font...
Weight & Style Coverage
Performance Comparison
| Metric | Inter | Source Sans 3 |
|---|---|---|
| Score | 59/100 | 59/100 |
| File Size | 525.2 KB | 380.1 KB |
| Weights | 9 (var) | 9 (var) |
| Italics | Yes | Yes |
| Variable Font | Yes (2 axes) | Yes (1 axes) |
| Language Groups | 7 | 7 |
| CDN Delivery | Yes | Yes |
| x-Height Ratio | 0.546 | 0.486 |
| Cap Height Ratio | 0.728 | 0.66 |
Source Sans 3 is 28% lighter for the standard weight set (400, 400i, 700).
Which Should You Choose?
Recommended: Inter
- Replaces 93 premium fonts
- modern, clean character
- Popular in enterprise-corporate and financial-services
- Variable font with continuous weight range
- Free under OFL-1.1
Consider: Source Sans 3
- Replaces 4 premium fonts
- professional, clean character
- Popular in enterprise-corporate and government-public-sector
- Variable font with continuous weight range
- Free under OFL-1.1
Premium Font Coverage
Both replace (4)
Only Inter (89)
Inter covers 93 premium fonts vs Source Sans 3's 4