Siteimprove alternatives
7 other tools do this job. Which one is right depends on why Siteimprove is not working for you — so start from the reason, not the list.
Why teams leave Siteimprove
- Expensive and aimed at organisations with a governance function.
- Weak fit for application testing as opposed to content sites.
- Limited shift-left developer tooling compared to Deque.
Worth saying: Siteimprove is genuinely strong at this — scans entire large sites and assigns findings to content owners, not just developers. If that is the part you rely on, switching may cost more than it saves.
If cost is the problem
Cheaper than Siteimprove at the entry point, or free outright.
Lighthouse
Accessibility
Google's built-in audit for performance, accessibility, SEO and best practices.
axe-core
Accessibility
The open-source accessibility rules engine almost every other tool is built on.
Pa11y
Accessibility
Command-line accessibility testing for CI, with a dashboard for tracking over time.
IBM Equal Access Toolkit
Accessibility
Free accessibility checker and rules engine from IBM, with a strong developer extension.
If you need open source
Siteimprove is proprietary; these are not.
Lighthouse
Accessibility
Google's built-in audit for performance, accessibility, SEO and best practices.
axe-core
Accessibility
The open-source accessibility rules engine almost every other tool is built on.
Pa11y
Accessibility
Command-line accessibility testing for CI, with a dashboard for tracking over time.
IBM Equal Access Toolkit
Accessibility
Free accessibility checker and rules engine from IBM, with a strong developer extension.
If it has to run on your own infrastructure
Siteimprove is cloud-only; these can be self-hosted.
Lighthouse
Accessibility
Google's built-in audit for performance, accessibility, SEO and best practices.
axe-core
Accessibility
The open-source accessibility rules engine almost every other tool is built on.
Pa11y
Accessibility
Command-line accessibility testing for CI, with a dashboard for tracking over time.
IBM Equal Access Toolkit
Accessibility
Free accessibility checker and rules engine from IBM, with a strong developer extension.
Everything else in Accessibility
Ranked by how widely adopted they are. Compare any two to see the differences that matter.
Accessibility platform combined with expert audits and legal-risk support.
Deque's commercial layer over axe-core: guided manual testing and enterprise reporting.
Google's built-in audit for performance, accessibility, SEO and best practices.
The open-source accessibility rules engine almost every other tool is built on.
Visual accessibility evaluation that shows problems in place on the page.
Command-line accessibility testing for CI, with a dashboard for tracking over time.
Free accessibility checker and rules engine from IBM, with a strong developer extension.
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