Carbone vs ReportLab

Carbone merges JSON data into document templates to generate files such as PDF, DOCX, XLSX, and PPTX. Templates can use formats including DOCX, ODT, ODS, XLSX, XML, Markdown, and HTML. Its conversion API handles more than 100 formats and supports LibreOffice, OnlyOffice, and Chromium. API access and bulk generation are listed, with Cloud, On-Premise, Private Cloud, and AWS deployment options. The pricing page lists free Cloud and On-Premise plans, plus a free 30-day trial for self-hosted On-Premise use. Cloud Essential costs $29.00 per month; documents are counted for each 1 MB of injected JSON and images, and additional documents beyond a plan allowance are invoiced separately. Carbone says Cloud stores templates for reuse but does not retain submitted JSON or generated documents beyond what rendering and delivery require. It says it has no access to customer templates, data, or generated documents in on-premise deployments. The service also offers an MCP server and an open-source Carbone Skill for connecting AI assistants and generating templates. Its listed platform options include API, Linux, macOS, self-hosted, web, and Windows.

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.