Airtable does allow you to create a publishable form view so that anyone can submit a new record. You can also add read-only users to a base without having to

Airtable does allow you to create a publishable form view so that anyone can submit a new record. You can also add read-only users to a base without having to pay for them. But giving them any kind of edit access (even just the ability to add comments to records) requires a full-fledged user account.