Thunders Accessibility Agent vs Total Validator
Thunders Accessibility Agent
thunders.ai
Total Validator
totalvalidator.comSide by side
| Figure | Thunders Accessibility Agent | Total Validator |
|---|---|---|
| Price from | $375/mo | Free |
| Free plan | — | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 3 | 4 |
| Spec score · Accessibility Testing Software | 7.9 (#84) | 9.1 (#6) |
| Founded | 2025 | 2005 |
| Purpose | Thunders Accessibility Agent automatically evaluates WCAG compliance and simulates assistive-technology behavior. | Total Validator checks website accessibility, HTML, CSS, broken links, and spelling. |
| Support | Starter includes email and chat support, Pro adds priority response and guided onboarding, and Enterprise includes a dedicated success manager and end-to-end setup. | The maker offers a contact form for product issues and questions and recommends checking the FAQ for common issues. |
Plans
Thunders Accessibility Agent
- Starter$375 a month
- Pro$1,000 a month
- EnterprisePriced on request
Total Validator
- TestFree
- Basic$10, paid once
- CI$39, paid once
- Pro$39, paid once
In their own words
Thunders Accessibility Agent
Thunders Accessibility Agent has no write-up on Specifiction yet; its figures are above.
Total Validator
Total Validator is a freemium tool for checking website accessibility, HTML, CSS, broken links and spelling. Automated accessibility checks cover WCAG 2.2, 2.1 and 2.0, US Section 508 and ARIA standards. It validates HTML and XHTML against W3C and WHATWG standards, and CSS against W3C standards. The product runs through web, Windows, macOS, Linux, an API and a browser extension, with CI/CD integration. Jenkins, Team City and Selenium can call the CI version, which also provides a Web API. Remediation guidance is included. Pro can test authenticated pages, intranets, private websites and JavaScript-generated DOMs through browser extensions, while returning results locally for security. The free Test version shows only a one-page issue summary. Basic handles one page at a time; whole-site and multiple-site validation are Pro features. Manual review tools and mobile testing are not provided.