Pricing for different database software varies greatly. Generally, the more powerful and feature-rich the software, the more expensive it is. Open source database solutions like MySQL and PostgreSQL are free to use, but they lack some of the advanced features of enterprise databases such as Oracle or IBM DB2. They may also require you to purchase additional modules or add-ons to achieve desired functionality. Cloud-based databases such as Amazon Relational Database Service (RDS) can be much more cost-effective than traditional solutions since they are usually priced on a “pay-as-you-go” basis. And since cloud solutions often take care of upgrades, maintenance and other overhead costs, they may be easier to manage overall. Ultimately though, the best solution for any organization will depend on its specific needs and budget restrictions.