Fonts like Sometype Mono
12 open fonts whose letters are closest to Sometype Mono, ranked by a glyph comparison. All free for commercial use.
Quick answer
The closest open font to Sometype Mono is Source Code Pro (similarity 84), then Intel One Mono and Noto Sans Mono. Source Code Pro 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 Code ProOFL-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
Intel One 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
Noto Sans 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
Source Code Pro OFL-1.1
Similarity 84 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#2
Intel One Mono OFL-1.1
Similarity 77 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#3
Noto Sans Mono OFL-1.1
Similarity 77 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#4
Noto Mono OFL-1.1
Similarity 77 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#5
iA Writer Mono OFL-1.1
Similarity 76 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#6
Red Hat Mono OFL-1.1
Similarity 76 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#7
IBM Plex Mono OFL-1.1
Similarity 76 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#8
Commit Mono OFL-1.1
Similarity 75 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#9
Fragment Mono OFL-1.1
Similarity 75 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#10
Fira Code OFL-1.1
Similarity 74 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#11
Atkinson Hyperlegible Mono OFL-1.1
Similarity 74 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
#12
Monaspace Neon OFL-1.1
Similarity 73 — 100 = identical letters, 0 = an average pair
Sphinx of black quartz, judge my vow
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.