ConfidentSend by Digital Confidence Ltd. is a data leakage prevention add-on for email clients, specifically Microsoft Outlook and Mozilla Thunderbird. It integrates with these email clients to automatically remove hidden data and metadata from email attachments before sending. The software is designed to ensure communication confidentiality by cleaning attachments of potentially sensitive information. ConfidentSend inspects and cleans attachments of outgoing emails, warning users of sensitive content in both emails and attachments.