c0x0.com extension vs Fastmask

c0x0.com addon make it easy to create new random e-mail aliases for websites by associating created alias with any e-mail address. Simply click on addon and generate e-mail alias. Next time you visit page, click on the addon and see e-mail alias that is used with that particular domain. About c0x0.com: c0x0.com is a service that allows to create aliases and attach them to existing e-mail accounts. It builds random alias impossible to track. Service was designed as a help to protect from leaking e-mail addresses all over the internet but it also have number of benefits - hide your identity - help fight spam (you can disable/enable alias anytime) - provides phishing protection: if you use random alias you know that legitimate e-mail have to be sent to correct alias that is impossible to guess - helps organize e-mail flow as each alias should be used to exacly one service - provide additional layer of security when used as SignIn/Login because their random nature - prevents tracking you by e-mail address, it’s no longer possible to link your activity using e-mail address (now everyone uses single e-mail for multiple services) NOTE: To be able to use this extension, you have to create account on https://web.c0x0.com/register/ and generate API access key. Account is free of charge and is ad-free. We never share any of your data, see privacy policy.

Fastmask is the companion app for Fastmail users who rely on masked email aliases. Connect your Fastmail account using secure Fastmail login to instantly create, manage, and disable aliases - keeping your real address private, reducing spam, and staying in control of where your messages go. • Secure Fastmail login • Create aliases instantly, including custom email prefixes. • Set local expiration dates for aliases. • Enable or disable aliases anytime to stop unwanted mail. • Bulk actions: manage multiple aliases at once. • Edit existing alias descriptions. • View, search, and open target domains directly from the list. • Tap an alias to quickly copy it—fast and accessible. • Safari Web Extension: Create masked email aliases directly from Safari and send them to the app. • Create aliases via the Shortcuts app for automation and one-tap workflows. • Manage multiple Fastmail accounts in one place with a dedicated sidebar. • Optimized layout for both iPhone and iPad. • Privacy-first design: no trackers, no data sharing, no selling. Upgrade to unlock unlimited aliases, full multi-account support, and all advanced features—seamlessly integrated with Fastmail.