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PDF Architect vs Nitro PDF Pro: catalog facts
PDF Architect	Nitro PDF Pro
Freemium Free version available, with paid Viewer, Professional and Business plans.	Paid A paid licence or subscription is required after the trial.
Windows	Windows, macOS
Free version to start with Modular plans so you pay only for what you need	Office-style interface with strong Word and Excel conversion Editing, OCR, redaction and signing in one licence
Windows only Many editing features require a paid plan	Paid licence with no free tier beyond a trial Windows and macOS only
Downloadable app	Downloadable app
Closed source	Closed source
License: Proprietary	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.