Side by side
Ace by DAISY vs Sa11y
Both stand on accessibility testing software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxMac+1
Ace offers several interfaces and report formats for EPUB accessibility evaluation. Its system requirements and stated maintenance terms should be considered before adoption.
Visit Ace by DAISY Free plan APISelf-hostedWeb
Sa11y offers multiple test integrations around axe-core, from Jest and Vitest to browser-rendered checks. Its open-source license, presets, and customization options make it adaptable for teams building accessibility checks into development pipelines.
Visit Sa11yThe facts
| Ace by DAISY | Sa11y | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Linux, Mac, Windows | API, Self-hosted, Web |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 1 | 1 |
| Maker | Not published | Not published |
| Website | daisy.org | github.com |
| On accessibility testing software | #50 of 169 | #46 of 169 |
Ace by DAISY: what it does well
- Automated EPUB accessibility tests
- HTML reports cover violations and metadata
- Command line, Node module and HTTP API
- Desktop app supports Windows, macOS and Linux
- Supports CI/CD integration and remediation guidance
What to know first
- Mobile testing is not supported
- Requires Node.js 20 or later for CLI
- DAISY has no maintenance obligation
- Latest documented version is 1.4.6
Sa11y: what it does well
- Free BSD-3-Clause open-source project
- Jest and Vitest matchers included
- WebdriverIO browser assertions available
- Custom rules and integrations supported
- WCAG 2.1 coverage listed
What to know first
- Checks only interfaces supported by axe-core
- Runtime dependency vigilance remains the consumer’s responsibility
- No commercial plans are stated
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