What are some alternatives?
When comparing SauceNAO and Barcode Scanner, you can also consider the following products
TinEye - Reverse Image Search to help find an image's source, duplicates or altered versions.
QuickMark - QuickMark makes everything possible.
NooBox - NooBox is a Chrome Extension that provides useful functions, such as: Multi-engine Reverse image search, Extract Images, Screenshot & Search
Obsqr - obsqr is an open-source, fast and lightweight QR scanner for Android.
Google - Google Search, also referred to as Google Web Search or simply Google, is a web search engine developed by Google. It is the most used search engine on the World Wide Web
MKH Barcode Reader - This tool can be used to scan QR codes on your PC or tablet. Note: a webcam is required.