# Fonts Like Roboto Mono

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

## Quick Answer

The closest open font to Roboto Mono is Overpass Mono (similarity 83), then Google Sans Code and Spline Sans Mono. Overpass 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 | **Overpass Mono** | 83 / 100 | OFL-1.1 | [/fonts/overpass-mono/](/fonts/overpass-mono.md) |
| #2 | **Google Sans Code** | 82 / 100 | OFL-1.1 | [/fonts/google-sans-code/](/fonts/google-sans-code.md) |
| #3 | **Spline Sans Mono** | 81 / 100 | OFL-1.1 | [/fonts/spline-sans-mono/](/fonts/spline-sans-mono.md) |
| #4 | **iA Writer Mono** | 81 / 100 | OFL-1.1 | [/fonts/ia-writer-mono/](/fonts/ia-writer-mono.md) |
| #5 | **Monaspace Neon** | 81 / 100 | OFL-1.1 | [/fonts/monaspace-neon/](/fonts/monaspace-neon.md) |
| #6 | **Noto Sans Mono** | 81 / 100 | OFL-1.1 | [/fonts/noto-sans-mono/](/fonts/noto-sans-mono.md) |
| #7 | **Fragment Mono** | 81 / 100 | OFL-1.1 | [/fonts/fragment-mono/](/fonts/fragment-mono.md) |
| #8 | **Geist Mono** | 81 / 100 | OFL-1.1 | [/fonts/geist-mono/](/fonts/geist-mono.md) |
| #9 | **IBM Plex Mono** | 80 / 100 | OFL-1.1 | [/fonts/ibm-plex-mono/](/fonts/ibm-plex-mono.md) |
| #10 | **DejaVu Mono** | 79 / 100 | OFL-1.1 | [/fonts/dejavu-mono/](/fonts/dejavu-mono.md) |
| #11 | **Inconsolata** | 79 / 100 | OFL-1.1 | [/fonts/inconsolata/](/fonts/inconsolata.md) |
| #12 | **Reddit Mono** | 79 / 100 | OFL-1.1 | [/fonts/reddit-mono/](/fonts/reddit-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/roboto-mono.json](/api/fonts-like/roboto-mono.json).