This document compares open source and closed source (proprietary) software across several factors:
Cost - Open source software is free while proprietary software has licensing fees and annual support costs.
Service and support - Open source relies on online communities for support while proprietary has formal support structures.
Innovation - Open source allows flexibility and adaptation while proprietary does not allow viewing or altering source code.
Security - Many view proprietary as more secure since its developed in a controlled environment and audited, while open source has security concerns from some.