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

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