Fonts like Fira Sans
12 open fonts whose letters are closest to Fira Sans, ranked by a glyph comparison. All free for commercial use.
Quick answer
The closest open font to Fira Sans is Source Sans 3 (similarity 85), then Rambla and Noto Sans JP. Source Sans 3 is released under the SIL Open Font License 1.1 and is free for commercial use.
Side-by-side comparison
Top lookalikes compared at the same size Sphinx of black quartz, judge my vow
Sphinx of black quartz, judge my vow
Sphinx of black quartz, judge my vow
Sphinx of black quartz, judge my vow
Top lookalikes: licence permissions
Commercial rights side by sideSource Sans 3OFL-1.1
Commercial workAllowed
Logo or wordmarkAllowed
WebsiteAllowed, with conditions
App or gameAllowed, with conditions
Modify the fontAllowed, with conditions
Share the font fileAllowed, with conditions
Sell the font fileNot allowed
No credit needed in your workAllowed
RamblaOFL-1.1
Commercial workAllowed
Logo or wordmarkAllowed
WebsiteAllowed, with conditions
App or gameAllowed, with conditions
Modify the fontAllowed, with conditions
Share the font fileAllowed, with conditions
Sell the font fileNot allowed
No credit needed in your workAllowed
Noto Sans JPOFL-1.1
Commercial workAllowed
Logo or wordmarkAllowed
WebsiteAllowed, with conditions
App or gameAllowed, with conditions
Modify the fontAllowed, with conditions
Share the font fileAllowed, with conditions
Sell the font fileNot allowed
No credit needed in your workAllowed
All 12 open lookalikes, ranked
Comparison based on letter shape and edge texture#1
Source Sans 3 OFL-1.1
Similarity 85 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#2
Rambla OFL-1.1
Similarity 85 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#3
Noto Sans JP OFL-1.1
Similarity 84 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#4
Noto Sans Display OFL-1.1
Similarity 83 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#5
Varta OFL-1.1
Similarity 83 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#6
Basic OFL-1.1
Similarity 82 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#7
Assistant OFL-1.1
Similarity 82 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#8
Merriweather Sans OFL-1.1
Similarity 82 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#9
Murecho OFL-1.1
Similarity 81 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#10
Orienta OFL-1.1
Similarity 81 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#11
Inria Sans OFL-1.1
Similarity 80 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#12
Farro OFL-1.1
Similarity 78 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
Fonts made for other scripts with similar Latin letters
Family variants
How the similarity score works
Each score is calculated by comparing 62 letters and digits (A-Z a-z 0-9) rendered at a 160px cap height on a 32×32 grid with 3px gaussian blur, combined with edge-orientation texture (weighted at 15%).
Scores are normalized on a standardized scale: 100 represents identical letterforms, and 0 represents an average pair among the 1571 fonts compared.