Apps similar to Aster Mail include Proton Mail, which is open source with a free version. Other options are Gmail, Tuta Mail, Fastmail and StartMail. In total there are nine WebMail Providers like Aster Mail for the web, Android, iPhone, iPad and Mac.
Proton Mail provides secure email services with end-to-end encryption, ensuring data protection. Swiss-based and outside US jurisdiction, it offers a free version to champion privacy as a human right. Fully accessible on any device.
Switzerland
Gmail offers robust spam blocking, undo send, Google Chat for collaboration, Spaces for organizing projects, Google Meet video calls, Smart Reply, threaded conversations, and swift notifications, seamlessly integrating with Google Workspace for a comprehensive email experience.
United States
Offers comprehensive encryption for email, calendar, and contacts with zero personal info required. Built on open source, install via Play Store, F-Droid, or APK, with Tor and VPN support. Both free and paid plans; utilizes quantum-resistant encryption ensuring privacy-focused, anonymous usage.
Germany
EU
Fastmail offers secure email hosting with comprehensive webmail services, including IMAP, POP, and SMTP protocols. It supports file sharing, shared folders, large mailboxes, instant messaging, and is compatible with popular email programs. Excellent for businesses with compliance features.
Australia
Privacy-focused email service offering easy one-click PGP encryption, 20 GB storage, disposable email addresses, and compatibility with IMAP/SMTP while adhering to Dutch privacy laws to secure data and communications effectively.
NetherlandsEU
Vivaldi Mail is a free email service with no ads and no strings attached developed by Vivaldi Technologies. It also offers contacts and calendar features, search capabilities, folders management, WEB/POP/IMAP access, 10GB of storage capacity, 20 MB of maximum attachment size...
Norway
Permanent and temporary email accounts with Webmail, IMAP, POP3, and API for registrations, incoming messages, codes, and automation.
Russia
Commercial email service emphasizing OpenPGP message encryption, SSL/TLS security, two-step authentication, file storage, custom domains, iOS support, spam filtering, ad-free web interface, and secure communications accessible via browsers and existing clients.
Canada
Encrypted email and chat app using device-generated OpenPGP keys, with automatic encryption for users and recipients whose public keys are available. Includes groups, media, voice notes, stickers, self-destruct timers, view-once messages, and encrypted voice and video calls.
