Table of contents
How we vet every listicle
Every agency featured on Web Tonic passes our 84-point editorial review before a single listicle goes live. This is how we vet each pick:
Verified client outcomes: We require real case studies with measurable KPIs — revenue, ROAS, CPA, retention — tied to the exact category being ranked. No cherry-picked wins, no unverifiable numbers.
Independent reputation: We cross-check Clutch, Google, G2, and Trustpilot ratings, and screen for review-bombing or suspicious patterns. Only operators with a consistent, verifiable track record make the cut.
Beyond that, every listing goes through a quarterly re-audit. We check 84 criteria across 6 pillars to make sure it still holds up — here are some of the checks we run:
A website accessibility (ADA) agency makes websites usable for people with disabilities: it audits pages against WCAG with automated tools, screen readers and keyboard-only testing, fixes the code, forms, PDFs and media it finds, and documents the result in reports or VPATs. Philadelphia hospitals, universities, law firms and city agencies publish document-heavy sites, so PDF remediation and Section 508 testing often sit next to the website audit.
To make this list, each of the nine external firms had to show a web accessibility or ADA compliance service on its own website. Not all of them have an office in Philadelphia, so each card states the base the firm publishes, and clients and prices appear only where published.
Which ADA website accessibility agencies work with Philadelphia organizations?
Web Tonic plus nine external firms with a web accessibility service on their own sites. Two are headquartered in Greater Philadelphia; the others serve Philadelphia remotely. None names a client publicly and none publishes a price.
1. Web Tonic
About: Web Tonic designs and builds Webflow, Shopify and WordPress sites from our Philadelphia office, so accessibility fixes, SEO and performance work can sit with one team. The site, code and accounts stay in the client's own name.
Key Services: Growth Marketing, Paid Social, PPC, Meta Ads, SEO, Google Ads, Snapchat Ads, Amazon Ads, Reddit Ads, TikTok Ads, TikTok Shop, GEO-AEO, Webflow Design, Shopify Design, WordPress Design, UGC, Social Media Management, Pay Per Click Management, Marketing Analytics, Analytics Implementation & CDPs, Performance Branding, Performance 360° Audit, Programmatic Ads, OOH Ads, HR Marketing
Industries Served: eCommerce, SaaS, B2B, Construction Professionals, Home Services, SMEs, Health Spa & Wellness, Retail, Legal & Judicial Services, Food & Beverages, Pets, Fitness, Family & Children, Finance & Insurance, Travel, Non-Profits & Organizations, Furniture & Decoration
Notable Clients: WorldRemit, Jack & Jones, Ardene, L’Oréal, Sendwave, Nestlé, Airbnb. Serve Fortune 500 companies and smaller fast-paced startups.
Locations: Local Philadelphia office, with the main HQ in San Francisco and notable offices in New York, Chicago, Miami, Toronto, Montreal, Dubai, Singapore, Sydney and more. Offices on five continents.
Pricing: Custom scope. Flexible and scalable plans according to your needs. Book a call to learn more.
Great For: Mid-market to enterprise-level businesses requiring ongoing, on-tap growth and performance marketing services.
Website: Web Tonic
2. Zivtech
About: Zivtech is a Philadelphia web development firm that builds and supports Drupal, WordPress and custom applications. Its accessibility service pairs automated checks with people who verify every fix, with a dedicated practice for government sites.
Key Services: WCAG Accessibility Audits, Accessibility Remediation, Drupal Development, WordPress Development, Custom Applications, Ongoing Monitoring
Industries Served: Government, Higher Education, Nonprofits, Healthcare, Associations
Notable Clients: Not named on the pages we checked
Locations: Philadelphia, Pennsylvania
Pricing: Quote-based
Great For: Public agencies facing ADA Title II or Section 508 deadlines, Colleges and universities, Vendors that need a VPAT for procurement
Website: Zivtech
3. WCAG Designs
About: WCAG Designs is an accessibility testing and inclusive design firm with an address in King of Prussia, outside Philadelphia. It tests sites and software with screen readers, voice control and switch access, then helps teams fix issues with reusable accessible UI code.
Key Services: WCAG Accessibility Audits, Manual Accessibility Testing, Screen Reader Testing, Inclusive Design, Accessible UI Prototypes, Re-Testing
Industries Served: Software, Financial Services, Healthcare, Education, Enterprise
Notable Clients: Not named on the pages we checked
Locations: King of Prussia, Pennsylvania
Pricing: Quote-based
Great For: Enterprises and regulated companies, Brands with large or complex websites, Teams that need audits plus remediation
Website: WCAG Designs
4. TestPros
About: TestPros is a third-party IT compliance firm with a test lab in Sterling, Virginia, and IAAP-certified analysts. Its accessibility audit services test websites and applications for Section 508 and WCAG and deliver findings with a remediation roadmap.
Key Services: WCAG Accessibility Audits, Section 508 Testing, Remediation Roadmaps, IT Compliance Audits, FedRAMP Support, Independent Assessments
Industries Served: Federal Government, Government Contractors, Healthcare, Financial Services, Technology
Notable Clients: Not named on the pages we checked
Locations: Sterling, Virginia
Pricing: Quote-based
Great For: Public agencies facing ADA Title II or Section 508 deadlines, Colleges and universities, Vendors that need a VPAT for procurement
Website: TestPros
5. Consensus Interactive
About: Consensus Interactive is a boutique digital experience agency with a Boston address. Its accessibility and compliance service handles accessibility audits alongside HIPAA, PCI and GDPR work for healthcare, finance and life sciences clients.
Key Services: WCAG Accessibility Audits, Compliance Audits, Web Development, Website Hosting, Digital Transformation, UX Design
Industries Served: Healthcare, Life Sciences, Financial Services, Pharmaceuticals, Technology
Notable Clients: Not named on the pages we checked
Locations: Boston, Massachusetts
Pricing: Quote-based
Great For: Enterprises and regulated companies, Brands with large or complex websites, Teams that need audits plus remediation
Website: Consensus Interactive
6. GoingClear Interactive
About: GoingClear Interactive is a web design and development agency founded in 2001 that worked in Boston for over 20 years and is now in Lynnfield, north of the city. Its website accessibility service sits alongside B2B web design, SEO and digital campaigns.
Key Services: WCAG Accessibility Audits, Accessible Web Design, B2B Web Design, SEO, Digital Campaigns, Web Development
Industries Served: B2B Technology, Manufacturing, Professional Services, Healthcare, Education
Notable Clients: Not named on the pages we checked
Locations: Lynnfield, Massachusetts (Greater Boston)
Pricing: Quote-based
Great For: Enterprises and regulated companies, Brands with large or complex websites, Teams that need audits plus remediation
Website: GoingClear Interactive
7. CentreIT
About: CentreIT is a women-owned technology firm headquartered in Washington, DC, and certified as a DC local and disadvantaged business. It offers Section 508 testing and WCAG remediation alongside application development and database consulting.
Key Services: WCAG Accessibility Audits, Section 508 Testing, WCAG Remediation, Application Development, Database Consulting, Mobile Development
Industries Served: Federal Government, DC Government, Nonprofits, Education, Healthcare
Notable Clients: Not named on the pages we checked
Locations: Washington, DC
Pricing: Quote-based
Great For: Public agencies facing ADA Title II or Section 508 deadlines, Colleges and universities, Vendors that need a VPAT for procurement
Website: CentreIT
8. Results One
About: Results One is a minority-, woman- and disability-owned consulting firm based in the Washington, DC metro area. It offers digital accessibility testing, training and technology solutions along with workforce development programs.
Key Services: WCAG Accessibility Audits, Digital Accessibility Testing, Accessibility Training, Governance, Workflow Development, Consulting
Industries Served: Government, Corporate, Nonprofits, Legal, Education
Notable Clients: Not named on the pages we checked
Locations: Washington, DC metro area
Pricing: Quote-based
Great For: Nonprofits and mission-driven organizations, Teams rebuilding a site to WCAG 2.2, Organizations that want accessibility training
Website: Results One
9. Bay Laurel Solutions
About: Bay Laurel Solutions is a women-led, LGBTQ+ web design agency based in San Francisco. It builds values-driven websites for small businesses and nonprofits, and its accessibility service covers website accessibility audits and fixes.
Key Services: WCAG Accessibility Audits, Accessible Web Design, Accessibility Remediation, Web Development, Branding, SEO
Industries Served: Small Businesses, Nonprofits, Professional Services, Wellness, Retail
Notable Clients: Not named on the pages we checked
Locations: San Francisco, California
Pricing: Quote-based
Great For: Nonprofits and mission-driven organizations, Teams rebuilding a site to WCAG 2.2, Organizations that want accessibility training
Website: Bay Laurel Solutions
10. Last Call Media
About: Last Call Media is a digital agency on Liberty Square in Boston that builds websites through empathy-driven design and agile development. Its accessibility practice includes audits and evaluations, accessible PDFs and forms, and consulting for public-sector teams.
Key Services: WCAG Accessibility Audits, Accessibility Consulting, Accessible PDFs, Drupal Development, UX Design, Digital Strategy
Industries Served: Government, Higher Education, Healthcare, Nonprofits, Financial Services
Notable Clients: Not named on the pages we checked
Locations: Boston, Massachusetts
Pricing: Quote-based
Great For: Public agencies facing ADA Title II or Section 508 deadlines, Colleges and universities, Vendors that need a VPAT for procurement
Website: Last Call Media
Quick Comparison Table
| Agency | Key Specialty | Starting Price | Best For |
|---|---|---|---|
| 1. Web Tonic | Full-Service Performance Marketing | Custom scope | Mid-market to Enterprise (local Philadelphia office) |
| 2. Zivtech | Drupal and WordPress sites that must stay compliant | Quote-based | Public agencies facing ADA Title II or Section 508 deadlines |
| 3. WCAG Designs | Software teams that need testing plus reusable fixes | Quote-based | Enterprises and regulated companies |
| 4. TestPros | Federal contractors needing independent testing | Quote-based | Public agencies facing ADA Title II or Section 508 deadlines |
| 5. Consensus Interactive | Regulated companies that need compliance in one place | Quote-based | Enterprises and regulated companies |
| 6. GoingClear Interactive | Greater Boston B2B companies | Quote-based | Enterprises and regulated companies |
| 7. CentreIT | DC agencies buying from certified local firms | Quote-based | Public agencies facing ADA Title II or Section 508 deadlines |
| 8. Results One | Organizations pairing testing with staff training | Quote-based | Nonprofits and mission-driven organizations |
| 9. Bay Laurel Solutions | Small businesses and nonprofits in the Bay Area | Quote-based | Nonprofits and mission-driven organizations |
| 10. Last Call Media | Public-sector teams in New England | Quote-based | Public agencies facing ADA Title II or Section 508 deadlines |
Frequently Asked Questions
How do I choose a website accessibility agency in Philadelphia?
Start with scope: one website, several sites, an app, or a large library of PDFs. Then check method. Ask whether testers use screen readers and keyboard-only passes, not just a scanner, whether findings map to WCAG 2.2 AA criteria, and whether the firm fixes issues or only reports them. None of these nine firms names a client on its own site, so ask each for a reference you can phone.
How much does website accessibility work cost in Philadelphia?
None of the external firms here publishes a price for accessibility work, so every figure will come from a proposal. Cost depends on how many page templates and user flows are tested, how many PDFs need remediation and whether the firm fixes issues or only reports them. Ask whether a re-test after fixes and a written conformance report are part of the fee.
What is the difference between an accessibility audit, remediation and an overlay?
An audit finds barriers and maps each one to a WCAG success criterion. Remediation fixes them in the code, content and documents. Ongoing monitoring catches new problems as pages change. Automated overlays and widgets are different: they add a toolbar to the page but do not fix the underlying code, and sites that use them are still sued under the ADA. The firms here sell human testing and fixes.
How long does it take to make a website ADA compliant?
A first audit of a typical business site usually takes two to six weeks, depending on how many templates and flows are in scope. Fixes can start on the most serious issues right away; a full remediation often takes one to three months, then a re-test. For an organization in Philadelphia, plan accessibility as a routine check on every release, because new pages and plugins can break it again.
Should a Philadelphia organization hire a local accessibility agency or a remote one?
Two of the nine external firms are headquartered in Greater Philadelphia; the others work remotely from bases such as Boston, Lynnfield and San Francisco. TestPros sits in Sterling, Virginia, and GoingClear in Lynnfield, Massachusetts. A local firm helps with on-site training or meetings with legal counsel, but audits, fixes and re-tests all run online. Testing method and experience with your platform matter more than the address.
Choosing a Website Accessibility Agency in Philadelphia
Start with your own scope. List the sites, apps, forms and documents people rely on, and note any demand letter, procurement request or deadline. A firm can only price an audit around templates and flows it has seen.
Check experience you can verify. None of the nine external firms names a client on their own site and none publishes a price. Ask the rest for a sample report, and see how our web development team builds accessible sites.
Agree how you will work together. Settle who fixes what, how issues are tracked, when the re-test happens and who signs the conformance report. Our technical SEO specialists can fix accessibility and search issues in the same release.
Never skip the consultation. Book calls with two or three firms from this list, share the same pages with each and compare the questions they ask about your users. If you want a team in the city, meet our Philadelphia office.
Related rankings
- Fourteen New York Agencies Sell ADA Website Work in 2026. Here Is Where They Sit.
- From Audit to Remediation: Eleven Chicago Web Accessibility Agencies in 2026
- Philadelphia App Teams and Apple Ads in 2026: Nine Agencies From Bournemouth to Kyiv
- Philadelphia Branding Agencies Worth a Call in 2026
- Web Tonic website accessibility services
