# Fonts Like Fira Sans

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

## Quick Answer

The closest open font to Fira Sans is Source Sans 3 (similarity 85), then Rambla and Noto Sans JP. Source Sans 3 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 | **Source Sans 3** | 85 / 100 | OFL-1.1 | [/fonts/source-sans-3/](/fonts/source-sans-3.md) |
| #2 | **Rambla** | 85 / 100 | OFL-1.1 | [/fonts/rambla/](/fonts/rambla.md) |
| #3 | **Noto Sans JP** | 84 / 100 | OFL-1.1 | [/fonts/noto-sans-jp/](/fonts/noto-sans-jp.md) |
| #4 | **Noto Sans Display** | 83 / 100 | OFL-1.1 | [/fonts/noto-sans-display/](/fonts/noto-sans-display.md) |
| #5 | **Varta** | 83 / 100 | OFL-1.1 | [/fonts/varta/](/fonts/varta.md) |
| #6 | **Basic** | 82 / 100 | OFL-1.1 | [/fonts/basic/](/fonts/basic.md) |
| #7 | **Assistant** | 82 / 100 | OFL-1.1 | [/fonts/assistant/](/fonts/assistant.md) |
| #8 | **Merriweather Sans** | 82 / 100 | OFL-1.1 | [/fonts/merriweather-sans/](/fonts/merriweather-sans.md) |
| #9 | **Murecho** | 81 / 100 | OFL-1.1 | [/fonts/murecho/](/fonts/murecho.md) |
| #10 | **Orienta** | 81 / 100 | OFL-1.1 | [/fonts/orienta/](/fonts/orienta.md) |
| #11 | **Inria Sans** | 80 / 100 | OFL-1.1 | [/fonts/inria-sans/](/fonts/inria-sans.md) |
| #12 | **Farro** | 78 / 100 | OFL-1.1 | [/fonts/farro/](/fonts/farro.md) |

## Other Scripts With Similar Latin Letters

- **Narnoor** (Gong): Similarity 85, licence OFL-1.1 - [/fonts/narnoor/](/fonts/narnoor.md)
- **Hind Guntur** (Telu): Similarity 79, licence OFL-1.1 - [/fonts/hind-guntur/](/fonts/hind-guntur.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/fira-sans.json](/api/fonts-like/fira-sans.json).