ProtonMail is the world's largest secure email service, developed by CERN and MIT scientists.
While ProtonMail is a solid choice for secure email, users often explore alternatives to find better pricing, specific features, or privacy approaches that align with their unique needs. Whether you're looking for more affordable plans, additional customization options, or different encryption methods, several strong competitors offer compelling reasons to reconsider your email provider.
Here are the best alternatives to ProtonMail, ranked by popularity and user engagement.
Plans start at $3 a month. 30-day Free Trial. All the Control and Features you love with no creepy surveillance. Stop paying for email with your privacy.
Offers the best balance of affordability and professional features, including custom domains, advanced forwarding rules, and calendar integration at transparent pricing tiers, making it ideal for users who want full control without surveillance-based monetization.
Tutanota is the secure email service, built in Germany. Use encrypted emails on all devices with our open source email client, mobile apps & desktop clients.
Provides completely open-source encryption technology with end-to-end encryption by default for all emails, plus full-featured desktop and mobile apps—appealing to privacy advocates who want maximum transparency and cross-platform consistency.
We built Aster because encrypted email shouldn't require a technical degree or a compromise on features. Your inbox should be private by default , not as an add-on.
All encryption happens on your device before anything touches our servers. We cannot read your emails, and neither can anyone else. On top of standard PGP, Aster uses post-quantum cryptography by default, meaning your emails are protected even against future quantum attacks, and it works when emailing Gmail users too, not just other Aster users.
Features
End-to-end encryption – Email content, contacts, search, and attachments all encrypted client-side
Post-quantum cryptography – ML-KEM-768 + X3DH + Double Ratchet, protecting against store-now-decrypt-later attacks
Free aliases & ghost aliases – Auto-generated anonymous addresses included on every plan
Custom domains – Bring your own domain, included free
Burn-after-read, scheduled send, email snooze – Features you'd expect from a modern inbox
Fully open source – AGPL v3, codebase public on GitHub at launch
Cross-platform – Web, iOS, Android, macOS, and Windows
Servers in Germany – Hosted on Hetzner
We don't read your emails. We don't sell your data. That's the whole point.
Stands out with post-quantum cryptography integration, offering forward-thinking security for users concerned about quantum computing threats to current encryption standards, providing a unique advantage for long-term security.
Explore all 6 alternatives to ProtonMail below.
Email at its best, new from Basecamp.
The simple but powerful editor supports everything from links, images, videos to embedded social media posts
The first email compatible messenger: ordered by sender, not individual mails. With clean, minimal UI. Never get distracted again
Out of the box. You can sleep easy
Free, forever. You can purchase short tags if you want, but that's entirely optional
SKBD hooks you up with custom email aliases that forward mail to your main inbox, so you only see what matters, and you can keep your personal email private.
We strip tracking from emails, keep a record blocked emails in case you need to retrieve them, and allow you to block senders at the domain level (e.g. @business.com) and the email level (e.g. [email protected]).
Tutanota is the best free alternative, offering a genuinely feature-rich free tier with end-to-end encryption, mobile apps, and desktop clients at no cost. For users wanting no premium tier limitations, it provides more generosity than ProtonMail's free plan.
Fastmail is the most popular alternative among users seeking to move away from ProtonMail, largely due to its established reputation in the email community, professional-grade features for small businesses, and transparent pricing model that builds user trust.
We've curated 6 alternatives to ProtonMail on Uneed. Each alternative has been carefully selected based on features, popularity, and user feedback.
Fastmail is best for professionals and small businesses needing custom domains and advanced features; Tutanota excels for privacy-first users who prioritize open-source transparency; Aster Mail is best for security researchers and organizations concerned about future quantum computing threats.