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Open Sans vs Source Sans 3
Open Sans and Source Sans 3 are both freely available sans-serif fonts often used as alternatives to the same premium typefaces. Open Sans serves as a replacement for 25 premium fonts while Source Sans 3 covers 47. This comparison helps you pick between two strong open-source options.
Design DNA
Design overlap:50%
Open Sans
Source Sans 3
Highlighted traits are shared between both fonts
Visual Comparison
Open Sans
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 | Open Sans | 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 | Apache-2.0 | 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 for wayfinding, environmental graphics, and public signage. Signage f...
Typography for established businesses, enterprise software, and professional ser...
Typography for medical, wellness, and healthcare applications. Healthcare fonts ...
Typography optimized for user interfaces, design systems, and digital products. ...
Typography for desktop and web applications, software interfaces, and digital to...
Typography for print and digital publishing, book design, and editorial producti...
Typography for business documents, reports, and professional communications. Doc...
Typography optimized for websites, landing pages, and web applications. Web font...
Weight & Style Coverage
Performance Comparison
| Metric | Open Sans | Source Sans 3 |
|---|---|---|
| Score | 54/100 | 59/100 |
| File Size | 706.8 KB | 380.1 KB |
| Weights | 9 (var) | 9 (var) |
| Italics | Yes | Yes |
| Variable Font | Yes (1 axes) | Yes (1 axes) |
| Language Groups | 7 | 7 |
| CDN Delivery | Yes | Yes |
| x-Height Ratio | 0.535 | 0.486 |
| Cap Height Ratio | 0.714 | 0.66 |
Source Sans 3 is 46% lighter for the standard weight set (400, 400i, 700).
Which Should You Choose?
Recommended: Open Sans
- Replaces 25 premium fonts
- clean, professional character
- Popular in healthcare-medical and enterprise-corporate
- Variable font with continuous weight range
- Free under Apache-2.0
Consider: Source Sans 3
- Replaces 47 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 (9)
Only Open Sans (16)
Only Source Sans 3 (38)
Open Sans covers 25 premium fonts vs Source Sans 3's 47