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You ran QA. You fixed the bugs. Everything looks solid -- until a scorching review reveals that your checkout button doesn't work with screen readers.
Accessibility issues might not show up during development, but they are there. If you don't catch them before launch, they will show up in painful ways after, leading to support tickets, lost users, or legal action.
Accessibility testing makes sure your app or website is usable by everyone. This includes people who need assistive technologies, like screen readers or keyboard navigation. With one in four U.S. adults living with a disability, inclusive design is imperative to your bottom line.
Most dev teams can't handle accessibility alone. Automated tools catch about 30% of accessibility issues, and standards like WCAG need expertise to interpret and apply. That's why more teams are partnering with accessibility testing companies.
Here's how some of the top accessibility testing companies compare—so you can find the right partner for digital accessibility audits and ongoing support for WCAG, ADA, and Section 508 compliance.
PLUS QA
Location:
Portland, Oregon
Website:
www.plusqa.com/qa-services/accessibility-testing
Overview:
PLUS QA partners with digital product teams in the U.S., blending functional QA with expert-led accessibility testing.
Core Services:
- ADA accessibility audits for web and mobile apps
- Usability testing with assistive technologies
- Accessibility Conformance Reports (VPAT format)
- Developer-ready remediation guidance
How We Work:
PLUS QA has tested digital products for more than 15 years, with a decade of accessibility expertise. We emphasize manual accessibility testing performed by trained testers and even those with disabilities. All testing is done on real devices, using assistive technologies like screen readers, switch controls, and magnifiers to uncover issues automated tools often miss. Our team works across platforms and browsers to ensure comprehensive coverage and compliance.
Pricing:
Custom quotes based on scope, platform, and team needs.
Deque
Location:
Herndon, Virginia
Website:
Overview:
Deque helps global businesses and government clients using a full-stack method for accessibility testing and integration.
Core Services:
- Manual audits and automated testing
- Developer tools (axe-core, axe DevTools)
- WCAG and Section 508 training
- Remediation consulting
How They Work:
Deque's tools integrate directly into CI/CD pipelines, while their audits and training help teams meet enterprise compliance standards.
Pricing:
License-based pricing for tools with custom consulting packages.
Knowbility
Location:
Austin, Texas
Website:
Overview:
Knowbility is a nonprofit dedicated to inclusive design and digital equity.
Core Services:
- Accessibility audits and usability testing
- Strategic planning and training
- Community-driven events (like AIR)
- Support for nonprofits and education
How They Work:
Their team uses WCAG skills with user-centered testing, focusing on public and nonprofit sectors.
Pricing:
Project-based pricing.
Level Access
Location:
Arlington, Virginia
Website:
Overview:
Level Access offers a scalable accessibility platform alongside enterprise-level services and legal risk consulting.
Core Services:
- Accessibility Management Platform (AMP)
- Manual and automated audits
- VPAT and ACR creation
- Developer enablement and compliance tracking
How They Work:
They pair software and support to help teams manage accessibility over time — from concept through maintenance.
Pricing:
Subscription-based platform access and consulting packages.
QualityLogic
Location:
Boise, Idaho
Website:
Overview:
QualityLogic provides accessibility testing and QA services. Their team of U.S.-based testers includes users with disabilities.
Core Services:
- Accessibility audits and real user testing
- WCAG/ADA compliance verification
- Remediation validation
- Functional QA integration
How They Work:
Their process emphasizes manual testing by trained auditors and real assistive tech users, with clear documentation and support.
Pricing:
Custom quotes based on project needs.
TPGi
Location:
Clearwater, Florida
Website:
Overview:
TPGi offers consulting, training, and a strong platform for managing accessibility.
Core Services:
- ARC monitoring platform
- Audits and VPATs
- Assistive tech user testing
- Strategic remediation support
How They Work:
Their manual evaluations and ARC platform help teams shape long-term accessibility strategies and maintain compliance.
Pricing:
Quotes are based on software licensing and service levels.
How to Select the Right Accessibility Testing Partner
Not all testing vendors are the same. Accessibility needs more than checklists and scanners. The right partner should understand your product, speak your team's language, and scale with your needs.
Start by asking the basics:
- Have they worked with products like yours? Web apps, mobile platforms, and kiosks all pose different challenges.
- Do they follow current standards like WCAG 2.1 or 2.2? That's your compliance baseline.
- Do they include testers with disabilities? Lived experience leads to more meaningful feedback.
- Can they adapt to your dev cycle and scope? Speed, flexibility, and straightforward reporting all matter.
If you use managed QA, consider whether you can build accessibility testing into the workflow. Early integration saves time and keeps your team moving forward.
PLUS QA: Accessibility Testing You Can Trust
What sets PLUS QA apart is our hands-on approach and human-powered testing. We focus on real users with real devices, unlike some vendors who depend on automation. We catch the things automation misses — like how a real person with a screen reader actually navigates your website or app.
That means understanding how your system works and testing it under the same conditions your users face. Whether you're working toward WCAG 2.2 compliance, need a VPAT for procurement, or want to improve usability for assistive tech users, we'll help you make accessibility part of how you build — without slowing you down.
Want to build a more accessible product? We'd be happy to help.