The company name or domain is sent to PowerSell’s own API together with the session token for your account. The API looks the company up through third-party search and language-model providers, scores the fit against your seller profile, and returns the result to the panel. When you ask for full research, the same providers run a longer report, which is saved to your account so you can open it in the web app.
Each provider receives only what that step needs: the company being researched and the question being asked. None of them receives your email address or your browsing.