Nutrient, once PSPDFKit, and Kernstra both put a PDF editor in your web app. Only one publishes its SDK price.

No SDK prices published; a quote scoped by solutions engineering and sales from the components, deployment model and use case; annual subscriptions, multi-year available; the viewer plus components such as annotations, form filling, form creator, electronic and digital signatures, comments and replies, redaction, OCR, measurement and content editor; a 30-day trial with full features by default, with no hard cutoff, watermarked, longer through sales; DWS Viewer API priced by usage.

The viewer is the foundation and you license the components you ship; annual or multi-year subscriptions; a 30-day trial, no card required.

A subscription that runs per year and cannot be changed to monthly; priced by operational mode, components, headless server-side processing and the number of users; a component is licensed with its whole feature set; a license is obtained through sales (read again 10 November 2026).

The domain must match location.origin exactly, subdomain included, with no wildcard; several domains at once need a custom solution.

Free: 250 viewer sessions a month; Starter $199 a month for 5,000 sessions ($1,988 billed yearly); Growth $399 a month for 20,000 sessions ($4,299 billed yearly); annual billing labeled as saving 10%; annotations, comments, form filling and electronic signatures can be enabled; app-provided documents open in the browser and are not sent to DWS.

The two are separate offerings: DWS Viewer API is usage-based, with documents managed by DWS or provided by the app; the Web SDK is a per-domain license whose key is verified offline (read 10 November 2026).

An optional SaaS component for Nutrient Web SDK that provides the Web SDK license entitlement, so no separate Web SDK license is needed; Free: 250 viewer sessions a month, 100 documents and 500 MiB storage, with commercial use in enterprises (more than 20 employees or more than $1M annual revenue) needing a paid plan; it does not replace every Web SDK component: digital signatures are not supported there yet, and measurement and document comparison are Web SDK features.

The product page (version 1.24.0, also called Web Viewer SDK): client-side WebAssembly or Document Engine; content editing, annotations, form creator and filling, electronic and PKI digital signatures, redaction, OCR in 30+ languages, Office conversion, measurement, threaded comments, real-time collaboration with Document Engine, comparison, AI Assistant; React, Angular, Vue, Svelte and Next.js; desktop and mobile; SOC 2 Type 2.

Client-side: content editor, form creator, form filling, electronic and digital signatures, redaction, measurement, comments and replies; OCR, real-time collaboration and document streaming need Document Engine.

Linearized loading is on by default; PDFs are read-only until fully downloaded.

Comments need a separate license component; without Document Engine, collaboration is asynchronous.

User and owner passwords and document permissions are set on export.

AI Assistant is a Docker container you deploy on your own infrastructure, with PostgreSQL and file storage.

WCAG 2.2 AA stated for the viewer; a VPAT 2.5 validated with Level Access, available under NDA.

SOC 2 Type II and SOC 3; the 2025 SOC 2 Type 2 reports available for review.

Nutrient Web SDK 1.0, formerly known as PSPDFKit for Web.

PSPDFKit was founded in 2011 and is now Nutrient.

Vendr marketplace data for Nutrient (formerly PSPDFKit) purchases, read on 11 November 2026: a median of $24,500 a year, a low of $9,530 and a high of $46,052; for Nutrient as a whole, not broken down by product. Vendr changes these figures between visits.