The most popular options include B2B directories, freelance websites, and dev blogs. B2B directories are websites that list application development outsourcing companies. You can filter them by location, expertise, and rating. For example, you can look for outsourced teams on Clutch - it has advanced search features, categories, reviews from previous clients, and classification.If you need a specialist with a particular expertise and skillset, you can look for them on freelance websites like Upwork. You can either find a team or a specific expert for a fixed-price or hourly rate. However, working with freelancers can be more risky than with an outsourcing company.Many development companies have their dev blogs where they share their knowledge and experience in app development. That’s another way to look for outsourced teams. If you like what they are writing about and have checked their web page and reviews, you can contact this company about your project.