Google opens document editing to users without Google accounts

Google has listened to user feedback and is currently testing a feature that will let G Suite users invite non-Google account holders to view, comment, suggest edits, and even directly edit Google Docs, Sheets, and Slides files.

Once enabled, G Suite admins can restrict this feature per company departments or domains, or restrict sharing of internal docs only with whitelisted domains (such as business partners' email domains), according to the feature's help page.