Alfa vs Grackle GO

Alfa is a free, open accessibility testing engine for websites built with HTML, CSS, and JavaScript. It checks pages against accessibility standards such as WCAG, using included rules or pluggable rules in the ACT Rules Format. Developers can add custom rules and filter results by conformance level or WCAG version. Audit output follows the Evaluation and Report Language schema as JSON-LD, and the command-line interface can audit a single page and save results as JSON. Scraper and crawler tools create page representations and discover pages across a site or subdomain. Ready-made integrations cover frameworks and test tools including Angular, React, Vue, Cypress, Jest, Playwright, Puppeteer, Selenium, and WebdriverIO. Alfa is distributed as separate npm packages under the MIT license. It runs in ECMAScript 2022-compatible JavaScript environments, including recent Node.js and browser versions. Building from source requires Node.js 20 or later and Yarn. The project says most integrations are experimental and may change; older environments may be targetable from source but are not explicitly supported.

Grackle GO is a tool for automated PDF accessibility checks. It scans documents and provides tools for tagging, reading order, alternative text, and remediation guidance. It supports PDF/UA and OCR. The service is listed for the web, Windows, macOS, and Linux, and its stated WCAG coverage is categorized as other standard. Its Free plan costs nothing. Unauthenticated users can run 10 validations per hour, and files must be no larger than 25 MB. The tool does not include manual review tools, mobile testing, a browser extension, or CI/CD integration. Grackle GO is made by Grackle GO, headquartered in Barrie, Ontario, Canada.