Anvil PDF Generation API vs ReportLab

Anvil PDF Generation API creates PDFs on demand from HTML and CSS or Markdown. For HTML, it supports full CSS, custom TTF fonts, page dimensions and margins, headers and footers, page numbers, and fillable forms. Markdown conversion applies a default theme, and callers can provide CSS of their own. The API can also generate variable-length documents and merge data into PDFs. Anvil lists SDKs for C#/.NET, JavaScript, Python, and TypeScript; Go, Java, PHP, and Ruby are marked as coming soon. A Zapier integration can automate paperwork workflows, including filling a PDF or starting or pre-filling a Workflow. It is a cloud service with API and web access, email support, and listed SOC 2 and HIPAA compliance. Test mode is free and unlimited on every plan, though test documents are watermarked and use demo signatures. API PDF fill or generation costs $0.10 per use; enabling metered usage with a valid credit card provides 2,500 starter credits. The Free plan is free and UI-only; API key access requires a credit card or upgrade. Custom fonts must be TTF; OTF and WOFF are not supported.

ReportLab Toolkit is a Python library for creating PDF documents and graphics. Its open-source edition is free for commercial use; ReportLab PLUS adds XML markup for template-based PDF production and commercial support. The tools can create charts and diagrams for print or web, and documents can be delivered through print, on-demand web creation, or email. Listed inputs include RML/XML, Python objects and variables, CSV, images, and existing PDFs. DocEngine is a hosted business offering with multiple inputs, validation tools, user access controls, and audit trails. Deployments can run in-house or on ReportLab servers using a modular json2pdf approach. PLUS licences are annual, priced by output-page volume, and intended for server-side use; embedding the software for resale is not permitted under the standard licence. The open-source toolkit is community-supported, while PLUS customers receive support with same-working-day responses during UK working hours. The free toolkit is listed at free. Non-financial PLUS plans include £1,728 a year for up to 30,000 pages per month. Platforms include API, Linux, macOS, self-hosted, web, and Windows.