Juxta is a free, open source tool for comparing and collating texts, originally intended for comparing multiple versions of the same text. It offers several views and visualization options, including histograms and side by side comparison. Juxta is available as both a desktop application and as a web service that can be integrated into the user's own website.

DiscoverText is a cloud-based textual analytics tool available for purchase. It is designed to collect data from sources such as social media, blogs and a variety of document formats, and generate tag clouds and reports from the resulting corpus.

PAIR (Pairwise Alignment for Intertextual Relations) is a free, open source sequence alignment algorithm for humanities text analysis. It identifies similar passages in a large corpus. Corpuses are indexed for future use, and incoming texts can be compared against the entire corpus.