Windows Insider Program for Developers
Bring even better apps to customers sooner with early access to the latest tools and resources.
Explore Windows 10 SDK Insider Preview Builds
We regularly release pre-release versions of the Windows 10 software delivery kit (SDK) to use with the latest Windows 10 Insider Previews. You can also download detailed release notes for each, including details on new APIs, controls, issues, fixes and more.
Run your own Insider Program
Many of the same tools that we use with Insiders to develop Windows can now be used to run an Insider program for your own apps. Create new testing strategies, gather deeper feedback from users, resolve issues faster, and keep your entire fan base more informed and engaged.