Pplacer places reads on a phylogenetic tree. guppy (Grand Unified Phylogenetic Placement Yanalyzer) yanalyzes them. rppr is a helpful tool for working with reference packages.

Pplacer places query sequences on a fixed reference phylogenetic tree to maximize phylogenetic likelihood or posterior probability according to a reference alignment. Pplacer is designed to be fast, to give useful information about uncertainty, and to offer advanced visualization and downstream analysis.