When we launched, we were aware of tons of other free services that let you delete content, but we found that most of them were either unmaintained and broken, not feature rich enough or complicated for grandmas to install. "Ok, so first- download Kali linux to a thumb drive. Then reboot into it and install python and clone this repo...."
Our goal with redact is to make privacy as accessible to the general public as possible. There are tons of services that let you delete 'public' data about you (for instance, deleting your whitepages.com page) but we found very few which took care of content YOU created across more than 1 service.