In order to assess the quality of services offered by a software development outsourcing company, it is important to look at a range of different quality criteria, including the company's reputation and track record, their technical capabilities and expertise, their project management processes and methodology, and their client satisfaction ratings and reviews. Other factors to consider when assessing software development outsourcing companies include the size and experience of the team working on your project, the tools they use, their communication methods, and their security and data protection protocols. Ultimately, however, the best way to judge the quality of a software development outsourcing company is by working with them on a small project or pilot project first, in order to assess how well they meet your needs and expectations.