Factors
Open source
Closed source
Price
Available for nominal or zero licensing and usage charges.
Cost varies based upon the scale of the software.
Freedom to customize
Completely customizable but it depends on the open source license. Requires in-house expertise.
Change requests must be made to the company selling the software. This includes bug fixes, features, and enhancements.
User-friendliness
Typically less user-friendly, but it can depend on the goals of the project and those maintaining it.
Typically more user-friendly. As a for-profit product, adoptability and user experience are often key considerations.
After-sales support
Some very popular pieces of open source software (e.g., OSS distributed by Red Hat or SUSE) have plenty of support. Otherwise, users can find help through user forums and mailing lists.
Dedicated support teams are in place. The level of service available depends on the service-level agreement (SLA).
Security
Source code is open for review by anyone and everyone. There is a widespread theory that more eyes on the code makes it harder for bugs to survive. However, security bugs and flaws may still exist and pose significant risk.
The company distributing the software (i.e., software owner) guarantees a certain level of support, depending on the terms of the SLA. Because the source code is closed for review, there can be security issues. If issues are found, the software distributor is responsible for fixing them.
Vendor lock-in
No vendor lock-in due to the associated cost. Integration into systems may create technical dependency.
In most cases, large investments are made in proprietary software. Switching to a different vendor or to an open source solution can be costly.
Stability
This will depend on the current user base, the parties maintaining the software, and the number of years in the market.
Older, market-based solutions are more stable. New products have similar challenges as open source products. If a distributor discontinues an application, the customer may be out of luck.
Popularity
Some open source solutions are very popular and are even market leaders (e.g., Linux, Apache).
In some industries, proprietary software is more popular, especially if it has been in the market for many years.
Total cost of ownership (TCO)
TCO is lower and upfront due to minimal or no usage cost, and depends on the level of maintenance required.
TCO is much higher and depends on the size of the user base.
Community participation
The community participating in development, review, critique, and enhancement of the software is the essence of open source.
Closed community.
Interoperability with other open source software
This will depend on the level of maintenance and goals of the group, but it is typically better than closed source software.
This will depend on the development standards.
Tax calculation
Difficult due to undefined monetary value.
Definite.
Enhancements or new features
Can be developed by the user if needed.
Request must be made to the software owner.
Suitability for production environment
OSS might not be technically well-designed or tested in a large-scale production environment.
Most proprietary software goes through multiple rounds of testing. However, things can still go wrong when deployed in a production environment.
Financial institution considerations
The financial industry tends to avoid open source solutions. If used, a vetting process must take place.
Financial institutions prefer proprietary software.
Warranty
No warranty available.
Best for companies with security policies requiring a warranty and liability indemnity.
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