Alternatives to NAPS2
Simple document scanning to PDF with built-in OCR. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
NAPS2
Simple document scanning to PDF with built-in OCR.
Replacements
Listings that take over the same core job as NAPS2.
Adobe Scan
A free mobile scanner app from Adobe that turns paper documents into searchable PDFs with OCR.
Adobe Scan replaces a desktop scanner with a free Android and iOS camera app that corrects perspective and runs OCR, but combining files needs paid Acrobat Pro.
Genius Scan
Mobile document scanner with fast edge detection and PDF export.
Genius Scan moves scanning to an Android or iOS phone camera with on-device processing, while OCR, smart naming and cloud export require the paid tier.
Scanner Pro
iOS document scanner with OCR and workflow automation.
Scanner Pro is an iOS-only camera scanner with automated naming and delivery workflows, and OCR plus workflows require a subscription, unlike free NAPS2.
vFlat Scan
Phone scanner that flattens the curve when photographing book pages.
vFlat Scan is a mobile camera scanner that flattens curved book pages and removes fingers from edges, with the full feature set behind a subscription.
OpenScan
Scan paper documents into PDFs with an Android application.
OpenScan is a BSD-licensed Android app that photographs pages into PDFs, keeping an open-source option but relying on camera capture and lighting instead of a scanner.
Open Note Scanner
Open-source Android scanner for notes and printed documents.
Open Note Scanner is an open-source Android scanner with no account or cloud, using the phone camera with edge detection, but it is rougher and developed intermittently.
ABBYY FineReader PDF
Commercial OCR and PDF editor with very high recognition accuracy.
ABBYY FineReader PDF is a paid, closed-source Windows and macOS OCR and PDF editor with higher recognition accuracy and document comparison.
PDF24 Creator
A free Windows PDF toolbox with a printer driver and dozens of tools for merging, converting, compressing and editing PDFs.
PDF24 Creator is free Windows-only software that adds OCR, merging and conversion, but is proprietary and focused on PDF tools rather than scanning.
Also worth comparing
These listings name NAPS2 as their own alternative, so the relationship runs both ways.
Document Scanner
GNOME's simple scanning app, formerly Simple Scan, for saving scanned documents as PDFs or images.
NAPS2 also scans to PDF simply, but adds built-in OCR for searchable PDFs and runs on Windows and macOS as well as Linux.
gscan2pdf
Linux graphical program for scanning documents and saving them as PDF or DjVu files.
NAPS2 scans to PDF with built-in OCR and runs on Windows and macOS as well as Linux, but it does not write DjVu files.
Similar software
Related functionality, not a direct replacement.
Tesseract OCR
The open-source OCR engine behind most free text recognition tools.
Papermerge OSS
Self-hosted document archive with OCR, tagging and full-text search.
PaperOffice DMS
Document management and OCR suite with cloud AI and on-premises options.
Stirling PDF
A self-hosted web PDF toolkit for merging, splitting, converting, signing and editing PDFs on your own server.