Massive vs Odyssey: What are the differences?
Massive: A Postgres-Centric Data Access Tool. Massive's goal is to help you get data from your database. This is not an ORM, it's a bit more than a query tool - our goal is to do just enough, then get out of your way. Massive embraces SQL completely, and helps you out when you don't feel like writing another mundane select * from statement; Odyssey: Scalable PostgreSQL connection pooler. Advanced multi-threaded PostgreSQL connection pooler and request router.
Massive and Odyssey can be primarily classified as "Database" tools.
Massive and Odyssey are both open source tools. It seems that Massive with 2.55K GitHub stars and 194 forks on GitHub has more adoption than Odyssey with 1.16K GitHub stars and 33 GitHub forks.