| It is responsible for creating individual software. | It is responsible for evaluating individual software. |
| It simply develops software through successive phases in orderly way. | It simply evaluates functionality of software application. |
| Software developers generally write code to develop software. | Software tester generally test whether or not code runs as we expected it to run. |
| They are responsible for helping business to be more efficient to produce system that can be sold on open market. | They are responsible for quality of software development and deployment. |
| Its main aim to make software that is free from errors and bugs. | Its aim is to find bugs and errors in software application if present. |
| They understand problem as soon as possible, improve quality of business, reduce costs, increase flexibility, etc. | They report problem as soon as possible, helps in saving money, provide security, and guarantee quality of software. |
| They not only develop the best software application, but also provide suggestions to improve software application. | They not only find bugs, but also find its root cause so that it can be resolved permanently. |
| Developer should have programming skills, proficiency at writing code, time management skills, etc. | Testers should have deep knowledge of system that is being developed, good communication skills, critical thinking, etc. |
| They generally develop new software product to meet user's requirement. | They generally work with new software so that errors can be reduced or repaired if present. |
| They mainly focus on user's requirement while developing software. | They mainly focus on behavior of end user while testing software application. |