GroupDocs.Redaction
7.6#1 in document redaction software$1,999 usage-basedAndroidiOSWebAPI
VisitIt suits developers or organizations that need to redact documents on-premises across varied file formats. The browser app may suit users seeking a web-based option.
PrivacyScrubber suits people or teams that need to redact documents or images and want automated detection, OCR redaction or batch processing. The Free Tier offers a way to use it within listed character, page and upload limits.