Software Alternatives & Startups

FlowCrypt VS ProtonMail

Compare FlowCrypt VS ProtonMail and see what are their differences

FlowCrypt

FlowCrypt (formerly CryptUp) is the easiest PGP encryption for Gmail. It behaves just like standard email, except it's encrypted.

Rating
0 reviews
ProtonMail

Secure email with absolutely no compromises. Get your free encrypted email account today.

Rating
5.0 · 2 reviews
Pricing
Freemium Free trial €5 / Monthly (user - 5 GB)

Which is more popular?

Based on our record, ProtonMail seems to be a lot more popular than FlowCrypt. While we know about 414 links to ProtonMail, we've tracked only 1 mention of FlowCrypt.

social mentions
1 vs 414
Email popularity
1% vs 99%
alternatives listed
50 vs 240+

Base details

Website, pricing, platforms and company facts side by side.

FlowCrypt
ProtonMail
Website flowcrypt.com proton.me
Pricing
Freemium Free trial €5 / Monthly (user - 5 GB) Official pricing
Company — Startup from Switzerland · 50 - 99 employees
Listed in

Features and specs

What each product offers, as listed by its team.

FlowCrypt 5 features
ProtonMail 5 features
  • End-to-End Encryption
    FlowCrypt provides robust end-to-end encryption for emails, ensuring that only the intended recipient can read the message.
  • User-Friendly Interface
    The extension integrates seamlessly with Gmail and other major email providers, offering a straightforward user experience.
  • Open Source
    FlowCrypt's core technology is open source, allowing the community to audit and improve the codebase, ensuring transparency and trust.
  • Cross-Platform Support
    Available for Chrome, Firefox, iOS, and Android, FlowCrypt allows users to encrypt their communications across multiple devices.
  • Free and Premium Versions
    FlowCrypt offers a free version with essential features, as well as a premium version with advanced functionalities for professional use.

Possible disadvantages

  • Dependency on PGP
    The service relies on PGP for encryption, which may not be the most user-friendly solution for non-technical users unfamiliar with cryptographic concepts.
  • Limited Provider Support
    While integrating well with Gmail, FlowCrypt's compatibility with other email providers might not be as seamless or feature-rich.
  • Potential Learning Curve
    Users unfamiliar with encryption technologies might face an initial learning curve to fully understand how to use FlowCrypt's services.
  • Premium Features are Paid
    Advanced features necessary for professional use require a paid subscription, which may be a drawback for users seeking completely free solutions.
  • Mobile App Limitations
    The mobile versions might not have full feature parity with the desktop extensions, potentially limiting functionality on-the-go.
  • End-to-End Encryption
    ProtonMail uses robust end-to-end encryption, ensuring that only the sender and the recipient can read the emails. This enhances the security and privacy of your communications.
  • Zero Access to User Data
    ProtonMail does not have access to user data or emails. This means that even ProtonMail cannot read your emails, providing an additional layer of privacy.
  • Swiss Privacy Laws
    Based in Switzerland, ProtonMail benefits from stringent Swiss privacy laws, which are some of the strongest in the world. This offers users greater legal protection against mass surveillance.
  • Open Source
    ProtonMail's encryption algorithms are open source, which means their code can be reviewed and audited by anyone, promoting transparency and trust.
  • User-Friendly Interface
    ProtonMail offers an intuitive and clean user interface, making it easy for users to manage their emails efficiently.

Possible disadvantages

  • Limited Free Storage
    The free version of ProtonMail offers only 500 MB of storage, which might be insufficient for users who need to store a large number of emails.
  • Paid Plans
    Advanced features and additional storage require a paid subscription, which may be a hassle for users looking for a completely free service.
  • Search Limitations
    Due to end-to-end encryption, the search functionality in ProtonMail is limited compared to other email services, as the search can only be performed on email subjects, not the content.
  • Compatibility Issues
    ProtonMail's encryption might not be fully compatible with other email services, potentially causing issues with sending and receiving encrypted messages.
  • Learning Curve
    New users who are unfamiliar with encryption concepts might find it slightly challenging to understand and use all of ProtonMail’s security features effectively.

Analysis

An editorial look at what each product does well and who it suits.

FlowCrypt
ProtonMail

No analysis of FlowCrypt yet.

Overall verdict

  • ProtonMail is generally considered to be a good email service, especially for users who prioritize privacy and security. Its user-friendly interface and strong encryption make it a reliable choice for personal and professional communication.

Why this product is good

  • ProtonMail is known for its strong emphasis on privacy and security. It offers end-to-end encryption, ensuring that your emails are secure and can only be read by the intended recipient. Additionally, the service is based in Switzerland, which has strong privacy laws. ProtonMail is also open-source, allowing for transparency and community trust in its security measures.

Recommended for

  • Individuals who prioritize email privacy and security
  • Journalists, activists, and professionals handling sensitive information
  • Users looking for an ad-free email experience
  • Anyone seeking a secure communication tool with a simple, intuitive interface

Videos

Walkthroughs and reviews on video.

FlowCrypt 1 video + Add
ProtonMail 3 videos + Add

Flowcrypt PGP 10 15 2017

ProtonMail Review - Good or Not?

More videos

  • - ProtonMail Review
  • - Top 4 Email Services BETTER than Protonmail!

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
FlowCrypt
ProtonMail
1% 1%
99% 99%
100% 100%
0% 0%
0% 0%
100% 100%
100% 100%
0% 0%

User comments

Share your experience with using FlowCrypt and ProtonMail. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

FlowCrypt no reviews yet
ProtonMail 5.0 · 2 reviews

We have no reviews of FlowCrypt yet. Be the first one to post

  • Excellent mail service.
    SaaSHub review
    · Sep 2026

    Great company that is constantly improving their products in meaningful ways.

  • 5 Of The Best Alternatives To Proton Mail
    www.slashgear.com · Jan 2025

    Email providers like Gmail and Yahoo offer lots of great features for free. However, all those freebies come at a cost, as these popular email services track your activity and target you with ads. In contrast,...

  • The Top 4 ProtonMail Alternatives
    blog.superhuman.com · Aug 2024

    While ProtonMail is generally received in a positive light, it isn’t without its flaws. It’s been subjected to DDoS attacks that have made its services inaccessible to some users. ProtonMail is also not well suited to...

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Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

FlowCrypt 1 mention
ProtonMail 414 mentions
  • Flowcrypt for encrypted emails: thoughts?
    I was looking for ways to encrypted Gmail emails (I know, go look for another service...) and found this add-on: https://flowcrypt.com/. Source: almost 5 years ago
  • Email username
    You might want to consider getting a domain name of your own and then get email hosting which will allow you to set up your email in the way you want. If you don't want to have to manage and pay for domain name and email hosting, you may... Source: almost 3 years ago
  • How to Force Current Session Logout - Answered
    I closed all Proton Mail tabs and navigated to protonmail.com and a cleared out login area was shown. Without checking the "keep me logged in", I entered my credentials and was prompted for my 2FA info. I entered that and it worked. Source: about 3 years ago
  • help
    Can I add my gmail account to my proton mail account so I can send emails and choose betwen my gmail.com email or my protonmail.com email account? Im not talking about the easy switch feature btw. Source: about 3 years ago

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Alternatives to FlowCrypt and ProtonMail

When comparing FlowCrypt and ProtonMail, you can also consider the following products.