The Best Accessibility Testing Tools of 2026

The best accessibility testing tools of 2026 help website operators, web agencies and businesses to identify digital barriers at an early stage and address them effectively. They check key criteria such as usability, contrast, keyboard navigation, alternative text and compliance with current WCAG standards. In this article, you’ll find out what features a good accessibility testing tool should offer and what you need to look out for when choosing one.

Which tool is really the right fit for your business model?

The European Accessibility Act (EAA) has been in force in Germany since 28 June 2025. You can read more about this topic in the blog post Why companies should start checking their website for accessibility today.
Since then, demand for accessible websites has been rising – and the market for tools is growing just as fast. Anyone searching for ‘accessibility software for web agencies’ today will quickly find numerous tools, all of which sound promising – but are structured very differently.

So you can’t do without software support anymore – but which accessibility testing tools actually make sense for your agency? That depends on the question: what exactly do you want to offer?

We have systematically compared five relevant providers: decareto, IFDB, sitebrunch, Eye-Able and Silktide. No advertising, no affiliate links – just an honest assessment of which provider is best suited to which agency model.

First the question, then the tool

Before you decide on a tool, it’s worth clarifying three questions internally:

1. What are you selling – audits or remediation? Are you looking to offer and document accessibility audits as a service? Or do you also want to manage the operational implementation within your team?

2. Lots of small clients or a few complex projects? A freelancer with 30 SME clients needs something different from an agency with three enterprise accounts in the public sector.

3. Is the tool intended to boost internal productivity, or is it a product for clients? White-label capability, custom domains and automated report delivery are only relevant if you want to market accessibility as a managed service.

The five best providers of accessibility software at a glance

decareto – compliance platform with integrated data protection

decareto has grown out of the world of data protection and consistently applies that perspective to accessibility. The platform combines a GDPR check, a privacy policy generator and an accessibility audit within a single interface – making it one of the few solutions that truly offers data protection and accessibility as a seamless package.

What sets decareto apart from the competition

decareto uses software to scan entire websites, including all subpages – even those behind password protection and consent banners – in accordance with WCAG and BITV criteria. For agencies supporting clients with complex site structures, this is a crucial difference compared to tools that only provide random samples. Furthermore, the report contains prioritised recommendations for action with clear instructions for implementation.

The white-label platform is a true agency solution: reports can be created with your own logo, shared on custom domains and sent automatically to clients. Anyone wishing to market accessibility and data protection together as a compliance package will find a coherent, comprehensive offering here – GDPR checks, a data protection generator and accessibility audits all on a single platform.

Added to this is a pricing model that stands out from the competition: white-label reporting, custom domains, API, SSO and multi-site monitoring – from €34 per month for five websites, and in higher tiers from as little as €3 per website per month. Comparable features cost many times more with enterprise-focused providers or are simply not publicly priced.

Well suited for: Agencies and data protection officers who want to offer accessibility and data protection from a single source; scalable white-label audits with ongoing monitoring; anyone who needs enterprise-grade quality without an enterprise budget.

IFDB – Certification and legal protection

IFDB approaches accessibility from the perspective of compliance verification. The Access Suite combines an automatic initial scan, a manual audit using real users and assistive technologies, PDF remediation, real-time monitoring and – something the others do not offer – contractual protection against warning letters. It also offers a partner programme with comprehensive accessibility consultancy.

The reference frameworks are WCAG 2.2, BITV 2.0 and PDF/UA. For agencies serving clients in the public sector or highly regulated industries, this is a significant distinction. Pricing is modular and tailored to individual needs – there is no public price list, which makes costing more difficult, but this is not a deal-breaker for large projects.

Well suited for: Agencies acting as outsourcing partners for regulated clients, with formal reporting requirements or a need for PDF testing and certification.

sitebrunch – Operational team workflow

sitebrunch is particularly strong where several people are involved in implementing accessibility. Comments directly on the website, task allocation, exports to Jira, Notion and Asana, as well as guided manual checks with 96 verification steps, make it the most powerful tool for delivery teams.

Added to this are very affordable entry-level prices – from free to €149 per month for agencies – and an MCP server for AI-supported implementation workflows. White-label options are included in higher-tier plans. PDF validation against PDF/UA and WCAG is also included.

Well suited for: Agencies that organise accessibility internally as a team task and wish to feed results directly into existing project management workflows.

Eye-Able – Broadest operational scope

Eye-Able covers the widest range of features when it comes to day-to-day operations: an Assist widget for end users, AI-powered error correction for 26 error types, plain language, translations, PDF validation, Jira integration and manual testing with affected users. Validation is carried out against WCAG, EN 301 549, BITV/BFSG and other national standards.

This makes Eye-Able particularly appealing to agencies that wish to sell their clients not just audits, but genuine user support and implementation guidance as well. Prices are not publicly available – a 14-day trial is available free of charge.

Well suited for: Agencies with enterprise clients and a focus on implementation, assistance functions and content/language layers as part of their offering.

Silktide – Website governance beyond accessibility

Silktide is the most comprehensive platform in this comparison and goes far beyond accessibility: accessibility, content quality, UX, privacy/GDPR and analytics all run on a single interface. CMS integrations enable automatic retests following changes; AI provides context-based suggestions for improvement.

For agencies wishing to position accessibility as part of a broader website quality strategy – and whose clients manage large, heterogeneous web portfolios – Silktide is the most powerful tool. Pricing is bespoke, with most contracts running for at least 12 months.

Well suited for: enterprise governance, large multi-site portfolios, agencies with quality management requirements extending beyond accessibility.

How to evaluate an accessibility testing tool

Are you interested in a specific tool? Then don’t just test the scanner. Test the report and the workflow behind it. This is the only way to find out whether the tool can stand up to the demands of day-to-day agency work.

· Can reports be sent directly to clients or shared – under your own branding?

· Can results be communicated to developers or project managers in a meaningful and understandable way?

· How good is the accuracy of findings in real client projects?

· Is automated monitoring sufficient, or do you need guided manual checks or tests involving stakeholders?

Decision guide: Which scenario suits you best?

The biggest mistakes in tool selection occur when agencies only view the scan demo – and fail to check whether the results actually work in client meetings, during handover to developers and in reporting.

Conclusion

There is no single accessibility testing tool that is right for every agency. Anyone looking to scale accessibility as a white-label compliance product with data protection implications will find decareto to be a well-suited model – especially as the combination of a full domain scan, WCAG/BITV/BFSG checks and prioritised recommendations for action, at a price starting from €3 per website per month, is unrivalled in the market. Those who need regulated clients and formal certification are better off with IFDB. Those who primarily manage delivery teams will reach their goals faster with sitebrunch. Those who also sell implementation, support and language layers should try Eye-Able. And those who view website governance as an overarching strategy will find the broadest range of options with Silktide.

The crucial question isn’t: Which tool has the longest list of features? It’s: Which one fits with what you really want to sell to your clients?