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Inter vs Source Sans Pro
Inter and Source Sans Pro 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 Pro covers 15. This comparison helps you pick between two strong open-source options.
Design DNA
Design overlap:33%
Inter
Source Sans Pro
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 !@#$%^&*()
Source Sans Pro
FreeAa Bb Cc 123
The quick brown fox jumps over the lazy dog
ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
0123456789 !@#$%^&*()
Feature Comparison
| Feature | Inter | Source Sans Pro |
|---|---|---|
| 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 tech companies, software products, and digital innovation. Tech f...
Typography for established businesses, enterprise software, and professional ser...
Typography optimized for websites, landing pages, and web applications. Web font...
Typography for wayfinding, environmental graphics, and public signage. Signage f...
Typography designed to grab attention at large sizes. Display fonts feature dist...
Typography designed specifically for titles, headers, and attention-grabbing tex...
Typography optimized for online retail, marketplaces, and shopping experiences. ...
Weight & Style Coverage
Performance Comparison
| Metric | Inter | Source Sans Pro |
|---|---|---|
| Score | 59/100 | 69/100 |
| File Size | 525.2 KB | 181.1 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 Pro is 66% 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 Pro
- Replaces 15 premium fonts
- professional, clean character
- Popular in enterprise-corporate and financial-services
- Variable font with continuous weight range
- Free under OFL-1.1
Premium Font Coverage
Both replace (5)
Only Inter (88)
Only Source Sans Pro (10)
Inter covers 93 premium fonts vs Source Sans Pro's 15