On 24 April 2026, GitHub flipped a default. Copilot Free, Pro and Pro+ now use your prompts and accepted code suggestions to train models unless you go into settings and switch it off. Until that date the same data sharing was opt-in. Now it's opt-out, and most individual subscribers never saw the toggle move.
That change is a good reason to actually read what your coding assistant does with the code you feed it. I went through the published terms for seven of the assistants developers actually use and pulled out the one thing that matters: does your code train a model, and can the vendor hold onto it? The short version is that "it depends on your plan" is not a cop-out answer. For most of these tools it's the literally correct answer, and the line usually runs right between the free tier you're using and the business tier you're not.
Here's where each one stands as of June 2026.
The quick comparison
Tool
