CASO Comply vs Nutrient DWS Accessibility API
CASO Comply
casocomply.comNutrient DWS Accessibility API
nutrient.ioSide by side
| Figure | CASO Comply | Nutrient DWS Accessibility API |
|---|---|---|
| Price from | — | $79/mo |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 3 | 5 |
| Spec score · PDF Accessibility Software | 7.9 (#9) | 8.0 (#8) |
| Founded | 1994 | 2011 |
| Headquarters | 134 West 29th Street, 11th Floor, New York, NY 10001, USA | Vienna, Austria |
| Purpose | CASO Comply discovers website PDFs, remediates them for accessibility, validates compliance, and can replace original files with accessible versions. | The cloud API automatically tags PDF files and validates accessibility conformance. |
| Security | CASO states that its cloud processing uses AES-256 encryption at rest, TLS 1.2+ in transit, and SOC 2 Type II certified infrastructure. | Nutrient says its infrastructure is SOC 2 Type 2 audited and GDPR-compliant, and API requests must use HTTPS. |
| Standards | The service targets WCAG 2.1 AA, PDF/UA (ISO 14289), and Section 508 compliance. | The API targets PDF/UA-1 (ISO 14289-1) conformance. |
| Support | The contact page says the team responds to contact forms within one business day and existing customer support inquiries within two business days. | All plans include documentation and developer support, with additional support options depending on plan. |
Plans
CASO Comply
- Standard Accessibility$0.30, paid once
- Enhanced Compliance — Most Popular$1.80, paid once
- Full Remediation$12, paid once
Nutrient DWS Accessibility API
- FreeFree
- Starter$79 a month
- Professional$249 a month
- Business$499 a month
- CustomPriced on request
In their own words
CASO Comply
CASO Comply has no write-up on Specifiction yet; its figures are above.
Nutrient DWS Accessibility API
Nutrient DWS Accessibility API processes PDFs to add accessibility tags and check conformance. It returns a tagged PDF with PDF/UA metadata and targets PDF/UA-1 (ISO 14289-1). Tagging covers H1–H6 headings, ordered and unordered lists, table rows and cells, reading order, annotations and decorative artifacts. The API accepts HTTP requests from any programming language, with quickstarts for Java, C#, JavaScript, Python and PHP. Nutrient reports 96.5% PDF/UA conformance across a validation corpus of 3,157 files. Its free plan costs nothing and includes 20 auto-tagged pages and 100 validations per month. Starter costs $79 a month for 200 pages and 1,000 validations; Professional is $249 a month for 1,000 pages and 5,000 validations; Business is $499 a month for 3,000 pages and 15,000 validations. Monthly quotas do not roll over, and requests in a quota category are blocked when that quota runs out unless a larger plan or pay-as-you-go is used. Auto-tagging does not guarantee full accessibility compliance, so Nutrient recommends QA, especially for sensitive or high-stakes documents.