Best WordPress Accessibility Audit and Scanning Tools (2026)

The number that should shape your entire audit programme is this: automated scanning detects around 30% of WCAG issues. Every tool in this article, from the free browser extension to the platform costing $10,000 a year, is competing over the same 30%. None of them reaches the other 70%, because those criteria require judgements about image intent, content clarity, heading logic, and visual design that a machine cannot make.

Once you accept that, the buying question changes usefully. You are not choosing which tool finds the most problems, because they largely find the same ones. You are choosing where in your workflow the checking happens: in the editor before publication, across the whole site periodically, or in a build pipeline before release. Those are three different products, and most sites need two of them.

Verified August 2026. Related: our WCAG 2.2 guide and EAA compliance guide.

Three places checking can happen

At authoring time, inside the editor, where an author sees a problem while they can still fix it in context. This is the cheapest possible moment and the only one that reduces the flow of new issues rather than clearing up old ones.

Across the site, by crawling every URL and producing a prioritised list with progress over time. This is what you need to answer “how are we doing” and to evidence improvement to someone who is asking.

In the pipeline, where a build fails if a change introduces a violation. This does not find your existing problems; it stops you adding new ones after you have fixed them, which is the difference between a one-off remediation project and a standard you hold.

Buying only the second is the common mistake. A crawl report tells you about 800 issues, nobody has time to fix 800 issues, and three months later there are 900 because nothing stopped new ones arriving.

The 6 tools compared

1. Equalize Digital Accessibility Checker

The authoring-time tool, and the one that changes behaviour rather than producing reports. It scans posts and pages inside the WordPress editor as you write, across more than 40 checks, so the author who introduced a problem sees it while the context is still in their head.

Commercially it is the outlier in this comparison. A free version exists, and paid plans start at $190 a year with unlimited scanning, no URL limits even across thousands of pages, and no API or per-page fees. Every other site-wide option here charges by scale in some form. That flat pricing is what makes it viable for large content sites, and it also provides a site-wide issue view alongside the in-editor checking, which covers two of the three workflow positions in one licence.

Pricing: Free version; paid from $190 a year, unlimited pages
Position: Authoring time, plus a site-wide view
Best for: Most WordPress sites, as the core of a programme
Watch out for: Content-focused; theme-level issues need browser tools

2. axe DevTools

The engine most of this category runs on. axe-core underpins a large number of other tools, so its rule set is effectively the industry definition of what automated detection covers, and the free browser extension gives you that directly.

Its distinguishing property is a very low false positive rate, which matters more than raw issue count. A tool that reports 400 issues of which 150 are noise wastes more time than one reporting 200 real ones, because someone has to triage every entry. axe is deliberately conservative: if it flags something, it is usually genuine. Output is developer-oriented, which suits fixing theme and template problems and does not suit a content team.

Pricing: Free extension; paid tiers for teams
Position: Per-page developer checking
Best for: Trustworthy findings with minimal triage
Watch out for: Developer output; no site-wide view in the free tier

3. WAVE

WebAIM’s tool, free as an extension, and the one to hand a non-specialist. Instead of a report it overlays icons directly onto the page, so a marketer sees a contrast warning sitting on the button they designed rather than a rule identifier in a table.

That presentation difference is the whole argument for it, and it is a real one: accessibility programmes fail when the people who create the problems cannot understand the reports. Its contrast checker is the strongest in this group. API access runs from around $100 a month for 1,000 page credits if you want programmatic scanning, though at that price a flat-rate site-wide tool is usually better value. Use the free extension for spot checks and education.

Pricing: Free extension; API from around $100 a month for 1,000 credits
Position: Per-page visual annotation
Best for: Getting non-specialists to understand the problem
Watch out for: API pricing is poor value against flat-rate scanners

4. Pa11y CI

Completely free and open source, and the only tool here occupying the pipeline position. Pa11y CI runs against a URL list during a build and fails it when new violations appear, which converts accessibility from a project into a constraint.

The workflow that makes it valuable is baselining. Do your remediation, set the current state as the accepted baseline, and from then on any theme update, plugin addition, or template change that introduces a violation fails before it reaches production. That is the difference between a site that was accessible in March and a site that is accessible. It needs a deployment process and someone to configure it, which excludes many small sites and makes it close to mandatory for anyone with staging.

Pricing: Free, open source
Position: Build pipeline, regression prevention
Best for: Holding a standard after remediation
Watch out for: Finds nothing new; prevents new things

5. Silktide

A governance platform crawling whole sites and reporting accessibility alongside content quality and SEO, with prioritisation, assignment, and progress tracking. Pricing is custom-quoted and typically 30% to 50% less than Siteimprove for comparable capability, which still puts it in the thousands per year.

What you are buying is the management layer rather than better detection: who owns which issue, what has improved this quarter, and a report you can put in front of a board or a regulator. For an organisation with several sites, multiple content teams, and someone accountable for compliance, that coordination is a genuine product. For a single site, it solves a problem you do not have, and Equalize Digital at $190 covers the detection at a fraction of the cost.

Pricing: Custom quote, typically 30% to 50% below Siteimprove
Position: Site-wide governance and reporting
Best for: Multi-site estates with accountable owners
Watch out for: You are paying for management, not detection

6. Siteimprove

The established enterprise platform, with the deepest policy management, role-based workflow, and reporting available. Enterprise pricing often exceeds $10,000 a year, and that figure is the decision rather than any feature comparison.

It is the right purchase for a university, a government department, or a large retailer with dozens of editors, real legal exposure, and staff whose job includes acting on the findings. It is the wrong purchase for an organisation hoping the software will fix the site, because it detects the same 30% as a free browser extension and then organises it beautifully. Buying enterprise governance without the team to act on it produces an expensive dashboard and an unchanged website.

Pricing: Enterprise, often above $10,000 a year
Position: Enterprise governance at scale
Best for: Large organisations with dedicated staff
Watch out for: Same detection ceiling as free tools

Comparison table

Tool	Annual cost	Authoring time	Site-wide	Pipeline	Best for
Equalize Digital	Free, or $190	Yes	Yes, unlimited	No	Core of most programmes
axe DevTools	Free	No	No	Via axe-core	Low false positives
WAVE	Free; API ~$1,200	No	No	No	Educating non-specialists
Pa11y CI	Free	No	By URL list	Yes	Preventing regressions
Silktide	Thousands	No	Yes	No	Multi-site governance
Siteimprove	Often $10,000 plus	No	Yes	No	Enterprise workflow

Reading a report without drowning

The first crawl of an established site typically returns hundreds or thousands of issues, and the natural response is to close the tab. A few principles make that list tractable.

Group by cause, not by instance. Eight hundred contrast failures are usually one CSS variable. Sort by rule rather than by page and the list collapses dramatically.
Template issues first. A problem in your header appears on every page. Fixing it once closes thousands of instances and is the fastest possible progress.
Weight by traffic. An issue on your homepage matters more than the same issue on a 2019 blog post nobody reads. Cross-reference your analytics before prioritising.
Separate errors from warnings. Most tools flag things needing human review as well as definite failures. Do the definite ones first; the review queue is slower work.
Expect false positives and log them. Every tool produces some. Record the ones you have assessed and dismissed so nobody re-litigates them next quarter.
Then start the manual work. Once the machine-detectable list is clear, the remaining 70% is where conformance actually lives, and no report will list it for you.

Related guides

Frequently asked questions

Which tool finds the most issues?

Broadly the same ones, because many run on axe-core or similar engines and all are bounded by the same roughly 30% automation ceiling. Choose on workflow position and false positive rate rather than on issue count, since a tool that reports more may simply be noisier.

Do I need a paid scanner at all?

Not to find your first hundred problems; free extensions do that. You need one when you want checking to happen automatically rather than when someone remembers, which for most sites means an in-editor tool.

How often should I scan?

Continuously at authoring time, and after every theme or plugin change for the rendered-page criteria. Quarterly full crawls are enough for reporting once the flow of new issues is under control.

What does a manual audit cost?

It varies with scope, but a focused audit of key journeys is usually comparable to a year or two of mid-range tooling. It is also the only route to the 70% that automation cannot see, so budget for it rather than treating it as optional.

Can I automate the whole thing?

No, and any vendor implying otherwise has a problem the FTC has already addressed elsewhere in this category. Automate detection of the mechanical issues and regression prevention; the judgement calls stay human.

Should I scan before or after remediation?

Before, to know your baseline, and again after, to evidence the change. Recording the starting position matters if you ever need to show a regulator or a court that you were working on it.

The verdict

For most WordPress sites: Equalize Digital at $190 a year, which covers authoring-time checking and a site-wide view on flat pricing, plus free axe DevTools for rendered-page and theme issues.

If you have a build process: add Pa11y CI, free, baselined after remediation. It is the only tool here that stops the problem coming back.

To get colleagues to care: WAVE, free. Showing a marketer the contrast icon on the button they chose does more than emailing them a report.

And spend the enterprise money only on the enterprise problem. Silktide and Siteimprove sell coordination across many sites and teams. They detect the same 30% as a free extension, so if your problem is one site and no process, they will produce a very good report about an unchanged website.

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