# Fonts Like Martian Mono

12 open fonts whose letters are closest to Martian Mono, ranked by a glyph comparison. All free for commercial use.

## Quick Answer

The closest open font to Martian Mono is Spline Sans Mono (similarity 80), then IBM Plex Mono and Geist Mono. Spline Sans Mono is released under the SIL Open Font License 1.1 and is free for commercial use.

## Ranked Open Lookalikes (12 Fonts)

| Rank | Font | Similarity Score | Licence | Details |
| :--- | :--- | :--- | :--- | :--- |
| #1 | **Spline Sans Mono** | 80 / 100 | OFL-1.1 | [/fonts/spline-sans-mono/](/fonts/spline-sans-mono.md) |
| #2 | **IBM Plex Mono** | 79 / 100 | OFL-1.1 | [/fonts/ibm-plex-mono/](/fonts/ibm-plex-mono.md) |
| #3 | **Geist Mono** | 79 / 100 | OFL-1.1 | [/fonts/geist-mono/](/fonts/geist-mono.md) |
| #4 | **iA Writer Mono** | 79 / 100 | OFL-1.1 | [/fonts/ia-writer-mono/](/fonts/ia-writer-mono.md) |
| #5 | **Google Sans Code** | 79 / 100 | OFL-1.1 | [/fonts/google-sans-code/](/fonts/google-sans-code.md) |
| #6 | **Roboto Mono** | 78 / 100 | OFL-1.1 | [/fonts/roboto-mono/](/fonts/roboto-mono.md) |
| #7 | **Chivo Mono** | 78 / 100 | OFL-1.1 | [/fonts/chivo-mono/](/fonts/chivo-mono.md) |
| #8 | **Cascadia Code** | 77 / 100 | OFL-1.1 | [/fonts/cascadia-code/](/fonts/cascadia-code.md) |
| #9 | **Monaspace Neon** | 76 / 100 | OFL-1.1 | [/fonts/monaspace-neon/](/fonts/monaspace-neon.md) |
| #10 | **Fragment Mono** | 76 / 100 | OFL-1.1 | [/fonts/fragment-mono/](/fonts/fragment-mono.md) |
| #11 | **JetBrains Mono** | 76 / 100 | OFL-1.1 | [/fonts/jetbrains-mono/](/fonts/jetbrains-mono.md) |
| #12 | **Commit Mono** | 76 / 100 | OFL-1.1 | [/fonts/commit-mono/](/fonts/commit-mono.md) |

## Scoring Method

62 letters and digits (A-Z a-z 0-9) rendered at 160px cap height on a 32x32 grid with 3px gaussian blur, combined with edge-orientation texture (15% weight). Scores are normalized so that 0 represents an average pair of fonts across the 1571 compared fonts, and 100 represents identical letter shapes. Computed on 2026-10-22 using glyph-shape + edge-texture v2.

## Machine API

JSON representation available at [/api/fonts-like/martian-mono.json](/api/fonts-like/martian-mono.json).