# Pa11y

- **Canonical URI:** https://www.vioscale.ai/software/pa11y
- **Category:** Accessibility Testing
- **Homepage:** https://pa11y.org/
- **Also known as:** pa11y
- **Profile claimed by vendor:** no
- **Last updated:** 2026-08-26T19:19:28.011Z

## Vioscale score

**44.9 / 100**, confidence 30% (low). Computed 2026-09-01.

Composite of weighted, independently-sourced signals (no user reviews, no vendor payment).

| Signal | Score | Weight | Contribution | Evidence present |
|---|--:|--:|--:|:--:|
| capabilities | 57.8 | 0.07844444444444446 | 4.5 | ✓ |
| repo_stars | 68.9 | 0.026 | 1.8 | ✓ |
| integrations | 0 | 0.07033333333333334 | 0 | - |
| dependent_projects | 53.7 | 0.063 | 3.4 | ✓ |
| dev_activity | 19 | 0.094 | 1.8 | ✓ |
| release_cadence | 27.2 | 0.052 | 1.4 | ✓ |
| security_posture | 0 | 0.073 | 0 | - |
| package_downloads | 0 | 0.136 | 0 | - |
| security_score | 73 | 0.042 | 3.1 | ✓ |
| community_qa_activity | 0 | 0.063 | 0 | - |

## Pricing

_As of 2026-08-21, [verify at source](https://pa11y.org/). Independently observed._

Open source · Free tier

> Free and open source

## About

A suite of free and open-source tools for identifying and tracking accessibility issues on websites. Provides both automated testing via a web dashboard and command-line utilities for developers.

_Independently observed._

## Platform & deployment

- **Platforms:** CLI, Web, Linux
- **Deployment:** Cloud / SaaS, Self-hosted

## Capabilities

_The capabilities that matter for Accessibility Testing. "-" = undocumented, not absent._

| Capability | Supported |
|---|:--:|
| **Capabilities** | |
| Scan method | Automated rules engine |
| Wcag level | - |
| Ci cd integration | ✓ |
| Browser extension | - |
| Design stage plugin | - |
| CMS plugins | - |
| Continuous monitoring | ✓ |
| Vpat acr generation | - |
| Manual audit service | - |
| Overlay widget | - |
| Document PDF testing | - |
| Open source | ✓ |

## Release history

| Version | Date | Type |
|---|---|---|
| [9.1.1](https://github.com/pa11y/pa11y/releases/tag/9.1.1) | 2026-02-26 | stable |
| [9.1.0](https://github.com/pa11y/pa11y/releases/tag/9.1.0) | 2026-02-03 | stable |
| [9.0.1](https://github.com/pa11y/pa11y/releases/tag/9.0.1) | 2025-09-25 | stable |
| [9.0.0](https://github.com/pa11y/pa11y/releases/tag/9.0.0) | 2025-05-09 | stable |
| [8.0.0](https://github.com/pa11y/pa11y/releases/tag/8.0.0) | 2024-03-27 | stable |
| [7.0.0](https://github.com/pa11y/pa11y/releases/tag/7.0.0) | 2024-01-16 | stable |

## Security & compliance


Known vulnerabilities: 0 (0 in the last 12 months) ([source](https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=pa11y&per_page=100)). A count reflects scale and disclosure, not quality.

## Facts

Every value below carries its source and our confidence. Facts are re-crawled on a freshness schedule.

### activity

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| activity.commits_last_30d | 3 | [link](https://github.com/pa11y/pa11y/pulse) | 2026-08-26 | 65% (medium) |

### adoption

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| adoption.github_stars | 4,490 | [link](https://github.com/pa11y/pa11y) | 2026-08-26 | 90% (high) |
| adoption.dependent_repos | 1,668 | [link](https://packages.ecosyste.ms/api/v1/packages/lookup?repository_url=https%3A%2F%2Fgithub.com%2Fpa11y%2Fpa11y) | 2026-08-26 | 85% (high) |

### language

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| language.primary | JavaScript | [link](https://github.com/pa11y/pa11y) | 2026-08-26 | 90% (high) |

### license

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| license.spdx | LGPL-3.0 | [link](https://github.com/pa11y/pa11y) | 2026-08-26 | 95% (high) |

### release

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| release.cadence_days | 131 | [link](https://github.com/pa11y/pa11y/releases) | 2026-08-26 | 70% (medium) |

### pricing

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| pricing.free_tier | yes | [link](https://pa11y.org/) | 2026-08-21 | 60% (medium) |
| pricing.model | open_source | [link](https://pa11y.org/) | 2026-08-21 | 60% (medium) |
| pricing.price_level | free | [link](https://pa11y.org/) | 2026-08-21 | 60% (medium) |
| pricing.transparent | yes | [link](https://pa11y.org/) | 2026-08-21 | 60% (medium) |

### security

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| security.scorecard | 7.3 | [link](https://api.securityscorecards.dev/projects/github.com/pa11y/pa11y) | 2026-08-26 | 90% (high) |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=pa11y&per_page=100","last_12m":0,"max_severity":null}` | [link](https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=pa11y&per_page=100) | 2026-08-26 | 90% (high) |

---
*Source: Vioscale (https://www.vioscale.ai/software/pa11y). Independent, evidence-based software intelligence. Cite the canonical URI.*