SauceNAO

Users can upload or paste an image to find its original source or related images across indexed databases.

Indexes billions of images from diverse sources including anime, manga, movies, TV shows, web services, and art platforms.

Search can be filtered or targeted to specific databases such as pixiv, Danbooru, deviantArt, Shutterstock, and others.

Uses a proprietary engine developed to handle large-scale image indexing and searching efficiently.

Supports browsing, dropping, or pasting images directly for quick search initiation.

Provides detailed source information for matched images to help identify origins and related content.

The indexed image set and search technologies are continuously expanded and improved.

Offers user support via email and IRC channel, and options to upgrade accounts or donate to support development.