You can see Grammarly's statement on the matter here: https://support.grammarly.com/hc/en-us/articles/360003816032-Is-Grammarly-a-keylogger https://support.gram

You can see Grammarly's statement on the matter here: https://support.grammarly.com/hc/en-us/articles/360003816032-Is-Grammarly-a-keylogger https://support.grammarly.com/hc/en-us/articles/360003816032... When enabled, it does basically send every keystroke to the mothership except in some fields on webpages and on mobile apps marked sensitive. However, they do have what seems like a solid privacy policy in how they handle the data they receive.