Pilosa vs Vespa: What are the differences?
What is Pilosa? Open source, distributed bitmap index in Go. Pilosa is an open source, distributed bitmap index that dramatically accelerates queries across multiple, massive data sets.
What is Vespa? Store, search, rank and organize big data. Vespa is an engine for low-latency computation over large data sets. It stores and indexes your data such that queries, selection and processing over the data can be performed at serving time.
Pilosa and Vespa can be primarily classified as "Big Data" tools.
Pilosa and Vespa are both open source tools. It seems that Vespa with 2.85K GitHub stars and 339 forks on GitHub has more adoption than Pilosa with 1.83K GitHub stars and 149 GitHub forks.