# Fonts Like Cascadia Mono

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

## Quick Answer

The closest open font to Cascadia Mono is iA Writer Mono (similarity 78), then Spline Sans Mono and DejaVu Mono. iA Writer 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 | **iA Writer Mono** | 78 / 100 | OFL-1.1 | [/fonts/ia-writer-mono/](/fonts/ia-writer-mono.md) |
| #2 | **Spline Sans Mono** | 78 / 100 | OFL-1.1 | [/fonts/spline-sans-mono/](/fonts/spline-sans-mono.md) |
| #3 | **DejaVu Mono** | 77 / 100 | OFL-1.1 | [/fonts/dejavu-mono/](/fonts/dejavu-mono.md) |
| #4 | **IBM Plex Mono** | 77 / 100 | OFL-1.1 | [/fonts/ibm-plex-mono/](/fonts/ibm-plex-mono.md) |
| #5 | **Noto Sans Mono** | 77 / 100 | OFL-1.1 | [/fonts/noto-sans-mono/](/fonts/noto-sans-mono.md) |
| #6 | **Monaspace Neon** | 77 / 100 | OFL-1.1 | [/fonts/monaspace-neon/](/fonts/monaspace-neon.md) |
| #7 | **Ubuntu Mono** | 77 / 100 | UFL-1.0 | [/fonts/ubuntu-mono/](/fonts/ubuntu-mono.md) |
| #8 | **Martian Mono** | 77 / 100 | OFL-1.1 | [/fonts/martian-mono/](/fonts/martian-mono.md) |
| #9 | **Fira Code** | 75 / 100 | OFL-1.1 | [/fonts/fira-code/](/fonts/fira-code.md) |
| #10 | **Geist Mono** | 74 / 100 | OFL-1.1 | [/fonts/geist-mono/](/fonts/geist-mono.md) |
| #11 | **Chivo Mono** | 74 / 100 | OFL-1.1 | [/fonts/chivo-mono/](/fonts/chivo-mono.md) |
| #12 | **Roboto Mono** | 74 / 100 | OFL-1.1 | [/fonts/roboto-mono/](/fonts/roboto-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/cascadia-mono.json](/api/fonts-like/cascadia-mono.json).