Top FlowCrypt Alternatives for Secure Email and More
FlowCrypt, formerly CryptUp, has been a go-to for many seeking easy PGP encryption for Gmail, making encrypted email behave like standard messages. However, just like with any popular software, users often look for alternatives due to varying needs like platform compatibility, specific features, pricing, or a desire for open-source solutions. If you're searching for a reliable FlowCrypt alternative, this guide will help you navigate the best options available across web, desktop, and mobile platforms.
Best FlowCrypt Alternatives
Whether you prioritize end-to-end encryption, multi-platform support, a specific pricing model, or a robust feature set, there's a FlowCrypt alternative out there that's perfect for you. Dive into our curated list of 20 apps similar to FlowCrypt.

ProtonMail
ProtonMail offers secure email with absolutely no compromises, developed by scientists from MIT and CERN. Based in Switzerland, it's outside of US and EU jurisdiction, with all user data protected by strict Swiss privacy laws. As a Freemium and Open Source platform available on Web, Android, iPhone, and iPad, ProtonMail boasts features like End-to-End Encryption, PGP Encryption, Custom domain, and self-destructing messages, making it a robust FlowCrypt alternative.

Tutanota
Tutanota is a free and Open Source web-mail client that strongly emphasizes privacy and security. Available on Web, Android, iPhone, iPad, and F-Droid, it offers dead-easy end-to-end encryption with all data stored encrypted. It features Encrypted Email, Custom domain support, Night mode, and an Encrypted calendar, making it an excellent privacy-focused FlowCrypt alternative.

Enigmail
Enigmail is a free and Open Source security extension for Mozilla Thunderbird and SeaMonkey on Mac, Windows, and Linux. It enables users to write and receive email messages signed and/or encrypted with the OpenPGP standard, providing straightforward encrypted email functionality as a direct FlowCrypt alternative, especially for desktop email clients.

mailbox.org
mailbox.org offers a secure, commercial e-mail account for home and business use, with over 20 years of experience as a reliable service provider. Available on the Web, it features Built-in Calendar, Custom domain, Encrypted Email with PGP and GPG encryption, and Two-factor authentication, making it a comprehensive commercial FlowCrypt alternative for those seeking robust features.

Yandex.Mail
Yandex.Mail provides a free, secure email service with robust spam and virus protection, available on Web, Windows Mobile, Android, iPhone, and Java Mobile. It supports multiple inboxes, offline access, Push Notifications, and Unlimited storage, making it a versatile and free FlowCrypt alternative for general email needs, though without native PGP integration.

Mailvelope
Mailvelope is a free and Open Source browser extension for Mac, Windows, Linux, Chrome OS, Microsoft Edge, Chrome, and Firefox. It enables OpenPGP encrypted emails directly within major webmail providers like Gmail and Outlook.com, integrating seamlessly into your workflow, making it a direct and user-friendly FlowCrypt alternative for browser-based encryption.

MsgSafe.io
MsgSafe.io offers private, encrypted online communication with multiple layers of security. As a Freemium Software as a Service (SaaS) available on Web, Android, and iPhone, it provides End-to-End Encryption for email and chat, Video Conferencing, and S/MIME support. Its focus on privacy and innovative technology makes it a strong FlowCrypt alternative for comprehensive secure communication.

Kolab Now
Kolab Now (formerly MyKolab) is a commercial and Open Source fully-featured secure collaboration and communication service, hosted exclusively in Switzerland. Available as SaaS via Web and DAVdroid, it offers CalDAV, CardDAV, Cloud Storage, Email Server, Notetaking, and Real-time collaboration, positioning it as a robust and secure FlowCrypt alternative for individuals and organizations needing more than just email encryption.

GPGMail
GPGMail is a commercial PGP plugin specifically for Apple Mail on Mac. It provides the essential functionality to sign, verify, encrypt, and decrypt mails using the OpenPGP standard, making it a direct and integrated FlowCrypt alternative for macOS users who prefer their native email client.

SCRYPTmail
SCRYPTmail is a Freemium, true end-to-end encrypted email service available on the Web. It encrypts both email content and metadata (sender/recipient) when communicating within the scryptmail domain. With publicly available source code and a 'True Zero Data Knowledge' approach, SCRYPTmail offers a highly private and auditable FlowCrypt alternative, especially for those prioritizing metadata encryption.
Ultimately, the best FlowCrypt alternative depends on your specific needs: whether you prioritize cost, open-source availability, specific platform support, or a unique set of security features. Explore these options to find the perfect fit for your secure email communication.