Fonts like B612 Mono
12 open fonts whose letters are closest to B612 Mono, ranked by a glyph comparison. All free for commercial use.
Quick answer
The closest open font to B612 Mono is Ubuntu Mono (similarity 77), then Ubuntu Sans Mono and Reddit Mono. Ubuntu Mono is released under the Ubuntu Font Licence 1.0 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 sideUbuntu MonoUFL-1.0
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 fileAllowed, with conditions
No credit needed in your workAllowed
Ubuntu Sans MonoUFL-1.0
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 fileAllowed, with conditions
No credit needed in your workAllowed
Reddit MonoOFL-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
Ubuntu Mono UFL-1.0
Similarity 77 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#2
Ubuntu Sans Mono UFL-1.0
Similarity 75 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#3
Reddit Mono OFL-1.1
Similarity 73 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#4
Overpass Mono OFL-1.1
Similarity 73 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#5
Roboto Mono OFL-1.1
Similarity 72 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#6
Noto Sans Mono OFL-1.1
Similarity 72 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#7
DejaVu Mono OFL-1.1
Similarity 72 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#8
Google Sans Code OFL-1.1
Similarity 71 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#9
Fira Code OFL-1.1
Similarity 71 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#10
Noto Mono OFL-1.1
Similarity 70 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#11
Monaspace Neon OFL-1.1
Similarity 70 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#12
Spline Sans Mono OFL-1.1
Similarity 70 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
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.