A scan tool buyer checklist helps teams compare accessibility scanners on the factors that actually affect outcomes: WCAG coverage, integration fit, authenticated page support, reporting depth, and pricing structure. Scans detect approximately 25% of accessibility issues, so the goal is selecting a scanner that covers that 25% accurately and fits into a broader evaluation program that includes (manual) auditing.
| Evaluation Area | What to Look For |
|---|---|
| Coverage | WCAG 2.1 AA and 2.2 AA rule sets, HTML, CSS, and ARIA evaluation |
| Authenticated Pages | Browser extension or session-based scanning for logged-in areas |
| Monitoring | Scheduled scans on daily, weekly, monthly, or custom cadences |
| Reporting | Issue location, WCAG reference, remediation guidance, export options |
| Pricing Model | Per-page, per-scan, per-user, or flat-rate structure with clear limits |
Coverage and WCAG Rule Sets
Start with what the scanner evaluates. The scanner should check HTML, CSS, and ARIA attributes against WCAG 2.1 AA or 2.2 AA criteria. Ask which specific criteria the rule set covers and which it skips. No scanner covers all success criteria, and the honest ones publish their coverage maps.
Confirm that the scanner identifies issues with enough precision to make remediation possible. A flag without a code reference or selector wastes developer time.
Authenticated and Dynamic Page Support
Most product work lives behind a login. If the scanner cannot evaluate authenticated pages, it will miss the surfaces where users actually spend time. Look for a browser extension that runs within an active session, or API-based scanning that accepts authentication tokens.
Dynamic content matters as much. Single-page applications, modals, and interactive components need to load before the scan runs. Confirm the scanner waits for rendered content rather than evaluating raw HTML on first paint.
Monitoring and Scheduling
One-time scans produce a point-in-time snapshot. Monitoring produces a change log. A scanner worth buying supports scheduled scans on daily, weekly, monthly, or custom cadences and alerts the team when new issues appear after a deploy.
Ask how the scanner manages historical data. Trend reporting across scans shows whether the product is moving toward or away from WCAG 2.1 AA conformance over time.
Reporting Quality
The report is the product. Evaluate sample output before purchasing. A useful report includes:
- Issue description with the WCAG success criterion and level referenced
- Location data with URL, element selector, and code snippet
- Severity or impact rating to support prioritization by user impact and risk factor
- Remediation guidance with code examples or plain-language fixes
- Export options in formats the development team already uses
Integrations and Workflow Fit
Scanners that live outside the development workflow get ignored. Check whether the scanner integrates with issue trackers, CI pipelines, and browser-based developer tools. Command-line and API access matter for teams that want scans running on every pull request.
For larger organizations, role-based access, project separation, and team-level reporting separate production-grade platforms from lightweight checkers.
Pricing Structure
Scanner pricing varies widely. Some tools charge per scanned page, others per seat, others a flat platform fee. Read the limits carefully. A low monthly price with a low page cap will cost more at scale than a higher flat rate with unlimited scans.
Factor in the services that often accompany scanning: audits that start at 1,000 dollars and range to 3,000 dollars for most projects, technical support hours, and remediation assistance. A scanner is one line item in a broader accessibility program.
What Scans Cannot Do
The final item on any scan tool buyer checklist is an honest accounting of limitations. Scans flag approximately 25% of accessibility issues. The remaining 75% requires screen reader testing, keyboard testing, visual inspection, and code review conducted by accessibility professionals. A scanner marketed as a complete conformance answer is misrepresenting how accessibility evaluation works.
Pair the scanner with a (manual) audit to cover the full WCAG rule set. The scanner manages continuous monitoring between audits.
The right scanner is the one that produces accurate findings on the 25% of issues it can detect, integrates with how the team already works, and reports results in a format that leads to actual fixes.