Alpha & Beta Testing are two important User Acceptance Testing types, performed during different intervals of the software testing life cycle. The former is an on-site test performed to identify the remaining bugs and glitches at the developer's site, while the latter is an external test that takes place at the client site. So, follow our discussion, to further understand the difference between alpha and beta testing.
Alpha testing is an on-site User Acceptance Testing which is executed before software release. It emulates the real-user environment through black-box & white-box testing approaches.
Beta testing is a salient testing type performed after the completion of alpha testing. It can be considered a form of external user acceptance testing, during which a version of the software, known as a beta version, is released to a limited audience to be tested for accessibility, usability, reliability, functionality, and more.