Side by side
AATT vs WebPossum
Both stand on website accessibility tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APISelf-hostedWeb
AATT provides several ways to add automated accessibility checks, including API, web, and direct Node use. Its documented integrations can connect those checks to Java, Node, and Nightwatch workflows.
Visit AATT
Free plan Web
WebPossum offers automated page scans, emailed reports, manual WCAG reviews, remediation, and monitoring. Choose among the free scanner and paid services according to whether you need detection, human findings, fixes, or ongoing checks.
Visit WebPossumThe facts
| AATT | WebPossum | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Self-hosted, Web | Web |
| Lowest paid plan | Not published | See the plans |
| Plans published | None | 4 |
| Maker | Not published | Not published |
| Website | github.com | webpossum.com |
| On website accessibility tools | #74 of 133 | #78 of 133 |
AATT: what it does well
- Free plan with no paid requirement
- Supports WCAG 2.1 testing
- Three documented testing engines
- Works as a Node module
- Can test pages behind a firewall
What to know first
- Requires repository setup and npm installation
- Runs on Node with included PhantomJS
- No free trial is offered
WebPossum: what it does well
- Instant URL audit requires no signup
- Free plan includes three scans monthly
- Reports list impact and affected elements
- Manual review includes specific recommendations
- Scheduled scans support recurring checks
What to know first
- Automated tools cover about 30–40% of violations
- Free plan is limited to three scans monthly
- Manual Audit costs $99 a month
- Full Remediation covers 30 pages
Alternatives to AATT Alternatives to WebPossum The whole list