# Pa11y vs Stark

**Leader by vioscaleAI score:** Stark

| Attribute | Pa11y | Stark |
|---|---|---|
| **vioscaleAI score** | 47 (30% (low)) | 54 (54% (medium)) |
| activity.commits_last_30d | 4 | - |
| adoption.dependent_repos | 1,668 | - |
| adoption.github_stars | 4,577 | - |
| content.faq | `[{"answer":"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. It is indexed under Accessibility Testing.","source":"https://pa11y.org/","question":"What is Pa11y?","confidence":0.6},{"answer":"Pa11y is open source, so it can be self-hosted and used at no licence cost. It is released under the LGPL-3.0 licence. Pricing changes often, so verify at source before relying on it.","source":"https://pa11y.org/","question":"Is Pa11y free to use?","confidence":0.6},{"answer":"Pa11y supports the web, Linux and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://pa11y.org/","question":"What platforms does Pa11y support?","confidence":0.6},{"answer":"Yes. Pa11y can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://pa11y.org/","question":"Can Pa11y be self-hosted?","confidence":0.6},{"answer":"Yes. Pa11y is published under the LGPL-3.0 licence, a copyleft licence, so check its terms before embedding it in a closed-source product. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/pa11y/pa11y","question":"Is Pa11y open source?","confidence":0.95}]` | `[{"answer":"A comprehensive accessibility solution that combines automated scanning, continuous monitoring, and design-stage checking tools across web, mobile, and design platforms to help teams identify and fix accessibility issues quickly. It is indexed under Accessibility Testing.","source":"https://www.getstark.co/","question":"What is Stark?","confidence":0.6},{"answer":"Stark offers a free tier, so you can start without paying. Paid plans start at $198 per user per year. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.","source":"https://www.getstark.co/pricing","question":"Is Stark free?","confidence":0.6},{"answer":"Stark supports the web, macOS, Android and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://www.getstark.co/","question":"What platforms does Stark support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Stark, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://www.getstark.co/","question":"Can Stark be self-hosted?","confidence":0.6},{"answer":"We have confirmed 13 integrations for Stark, including Figma, Sketch, GitHub, Chrome, Arc, Safari, Microsoft Edge and Brave, plus 5 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://www.getstark.co/","question":"What does Stark integrate with?","confidence":0.6},{"answer":"We have independently confirmed SOC 2 and GDPR for Stark. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Stark not holding them. Always confirm compliance directly before you rely on it.","source":"https://www.getstark.co/blog/understanding-section-508-and-WCAG-compliance/","question":"What security certifications does Stark have?","confidence":0.7}]` |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true}` |
| description.long | A command-line and Node.js-based utility that performs automated accessibility testing on web pages to identify compliance issues against WCAG standards. | An end-to-end accessibility platform for designers, engineers, and QA teams. Provides WCAG audits, automated scanning via browser extensions and design plugins, continuous monitoring, and integration with development workflows across web and mobile platforms. |
| features.capabilities | `{"wcag_level":"AAA","open_source":true,"scan_method":"automated-rules-engine","ci_cd_integration":true,"continuous_monitoring":true}` | `{"wcag_level":"AA","scan_method":"automated-rules-engine","browser_extension":true,"ci_cd_integration":true,"design_stage_plugin":true,"vpat_acr_generation":true,"continuous_monitoring":true}` |
| integrations.count | - | 3 |
| integrations.list | - | `[{"name":"Figma"},{"name":"Sketch"},{"name":"GitHub"},{"name":"Chrome"},{"name":"Arc"},{"name":"Safari"},{"name":"Microsoft Edge"},{"name":"Brave"},{"name":"Storybook"},{"name":"React"},{"name":"iOS"},{"name":"Android"},{"name":"Claude","native":true}]` |
| language.primary | JavaScript | - |
| license.spdx | LGPL-3.0 | - |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"mac":true,"linux":true,"windows":true}` | `{"cli":true,"ios":true,"mac":true,"web":true,"android":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://pa11y.org/","retrievedAt":"2026-09-13T19:32:37.685Z"}` | `{"type":"subscription","plans":[{"free":false,"name":"Premium Pack","summary":"$198/user/year (minimum 3 seats)","features":["Automated detection and remediation tooling (Figma only)","Automatic WCAG scans and reports in browser","Live code highlighting in browser web dev console"],"minSeats":3,"commitment":"annual","components":[{"kind":"per_unit","unit":"seat","amount":198,"period":"year","currency":"USD"}],"description":"Automated detection and remediation for Figma design files with browser-based WCAG audits","contactSales":false},{"free":false,"name":"Launch","summary":"$2,500/year","features":["25 viewers included","Monitor up to 100 pages","Weekly automated scans and reports","Supported assets: Figma, code repos, public URLs","30-day report data storage","Automated detection and remediation tooling in design and code"],"commitment":"annual","components":[{"kind":"fixed","amount":2500,"period":"year","currency":"USD"}],"description":"Starter plan for small teams with basic scanning and monitoring capabilities","contactSales":false,"includedLimits":{"viewers":"25","scan_frequency":"weekly","pages_monitored":"100","report_retention":"30 days"}},{"free":false,"name":"Grow","summary":"$8,000/year","features":["50 viewers included","Monitor up to 1000 pages","Daily scans and insight reports","Supported assets: Figma, code repos, CI/CD, iOS, Android, public and private URLs","180-day report data storage","Ticketing system integration","Automated draft VPAT report","Compliance Center to manage accessibility posture","Single Sign-On (SSO)"],"commitment":"annual","components":[{"kind":"fixed","amount":8000,"period":"year","currency":"USD"}],"description":"Mid-market plan with extended monitoring, daily scans, compliance features and ticketing integration","contactSales":false,"includedLimits":{"viewers":"50","scan_frequency":"daily","pages_monitored":"1000","report_retention":"180 days"}},{"free":false,"name":"Scale","summary":"$21,000/year (custom terms available)","features":["Unlimited viewers","Monitor up to 4000 pages","Real-time scans and insights reports","365-day report data storage","Single Sign-On (SSO) and JIT provisioning","Customizable terms and security reviews","Priority support and dedicated account manager","Enterprise-grade security, SOC2 and GDPR certified"],"commitment":"annual","components":[{"kind":"fixed","amount":21000,"period":"year","currency":"USD"}],"description":"Enterprise plan with real-time monitoring, unlimited viewers, advanced compliance and dedicated support","contactSales":true,"includedLimits":{"viewers":"unlimited","scan_frequency":"real-time","pages_monitored":"4000","report_retention":"365 days"}}],"summary":"From $198/user/year (Premium Pack, minimum 3 seats) or from $2,500/year (Launch plan). Free tier available.","currency":"USD","freeTier":true,"sourceUrl":"https://www.getstark.co/pricing","retrievedAt":"2026-08-25T08:32:47.236Z","startingPrice":{"amount":2500,"period":"year","currency":"USD"},"billingPeriods":["year"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | open_source | freemium |
| pricing.price_level | free | high |
| pricing.starting_price | - | `{"amount":2500,"currency":"USD"}` |
| pricing.transparent | yes | yes |
| release.cadence_days | 135 | - |
| release.history | `[{"url":"https://github.com/pa11y/pa11y/releases/tag/10.0.0","date":"2026-08-28T14:08:34Z","type":"stable","version":"10.0.0"},{"url":"https://github.com/pa11y/pa11y/releases/tag/9.1.1","date":"2026-02-26T14:45:52Z","type":"stable","version":"9.1.1"},{"url":"https://github.com/pa11y/pa11y/releases/tag/9.1.0","date":"2026-02-03T18:13:04Z","type":"stable","version":"9.1.0"},{"url":"https://github.com/pa11y/pa11y/releases/tag/9.0.1","date":"2025-09-25T13:56:19Z","type":"stable","version":"9.0.1"},{"url":"https://github.com/pa11y/pa11y/releases/tag/9.0.0","date":"2025-05-09T01:30:35Z","type":"stable","version":"9.0.0"},{"url":"https://github.com/pa11y/pa11y/releases/tag/8.0.0","date":"2024-03-27T03:22:52Z","type":"stable","version":"8.0.0"},{"url":"https://github.com/pa11y/pa11y/releases/tag/7.0.0","date":"2024-01-16T06:42:20Z","type":"stable","version":"7.0.0"}]` | - |
| security.disclosure_policy | - | yes |
| security.gdpr | - | yes |
| security.scorecard | 6.9 | - |
| security.soc2 | - | yes |
| 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}` | - |

## Capabilities (Accessibility Testing)

| Capability | Pa11y | Stark |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Scan method | Automated rules engine | Automated rules engine |
| Wcag level | AAA | AA |
| 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 | ✓ | - |

*Source: vioscaleAI. Generated 2026-10-16T20:01:33.861Z. "-" = undocumented, not absent.*