Canary Mail is an email service using a local data storage system. The client saves all emails and attachments on the user's machine, meaning third-party companies do not have access to sensitive information. Data is also automatically encrypted, offering a high level of security for those concerned about their online privacy. Canary Mail features a range of integration features commonly used by Gmail to ensure compatibility and a large amount of interface customization. While there are some features not available due to the lack of third-party software, Canary Mail is a great product overall.