What are some alternatives?
When comparing Datomic and PostgreSQL, you can also consider the following products
ElasticSearch - Elasticsearch is an open source, distributed, RESTful search engine.
MySQL - The world's most popular open source database
SQLite - SQLite Home Page
HTTP Commander - Web file access system for your Active Directory users and Windows file system. Must have for educational and other organisations with Windows users.
Oracle DBaaS - See how Oracle Database 12c enables businesses to plug into the cloud and power the real-time enterprise.
Microsoft SQL Server - Microsoft Azure is an open, flexible, enterprise-grade cloud computing platform. Move faster, do more, and save money with IaaS + PaaS. Try for FREE.