Proton Mail vs Microsoft Defender for Office 365

Zoho Mail

Symantec Email Security.cloud

PDFEncrypt

EasyDMARC

Tuta Mail

Abnormal AI

Compare Proton Mail and Microsoft Defender for Office 365 based on features, pricing, verified reviews, integrations & more on GetApp. Find out which software is best for your business in 2026.

Businesses can use the Tutanota app for Android and iOS to secure mailbox and calendars with automatic encryption. It comes with a GUI, a dark theme, instant push notifications, full-text search, swipe gestures and more.

Zoho Mail, a business-oriented and privacy-guaranteed email service, is your single email solution. Zoho Mail also comes bundled with modern collaborative tools and a suite of apps to meet your business needs. Migrate now and get your unique email address with Zoho Mail.


PDFEncrypt is a free, open source Windows app for password-protecting (encrypting) PDF files.

ProtonMail is a web-based email management platform that helps businesses securely transmit encrypted emails between users both inside and outside of the organisation.

Access Controls/Permissions

Activity Dashboard

Activity Tracking

Authentication

Compliance Management

Credential Management

Data Security

Email Attachment Protection

Email Filtering

Email Management

Encryption

HIPAA Compliant

Remote Access/Control

Reporting/Analytics

Secure Login

Spam Blocker

SSL Security

Third-Party Integrations

Threat Protection

Threat Response

Two-Factor Authentication

User Management

Whitelisting/Blacklisting

Proton Mail

Android

Linux

Web-based

Windows

iPad

iPhone

Its simple, easy to use, easy to connect domains to and manage. It really is the best solution for a secure email out there.

Administrator and owner

Protonmail Bridge often randomly logs out, and then it is a bit of a pain to log back in and sync everything up. The spam filter is sometimes too aggressive and hides legitimate mail.

Artist in Residence

I love that there is no spam and for this reason it is also a good email for children. Messages can be encrypted between users which is helpful and fun aswell.

Principal Investigator

I am absolutely thrilled with the Proton range of services and can rest easy knowing my clients data is safe.

IT Advisor

The free version is very powerful, you have everything you need. However, in the pro version you have more storage space, the mail is faster and the technical support works great.

President

It was very difficult to find concrete sending limits until I had spent the time uploading my newsletter email list. The paid service connection to VPN was confusing.

Life Coach

Of course there is a written help guide and it is also clear and, well, helpful.

Student

Better and secure platform for sending emails with end to end encryption. It having vpn service only for subscription plans only.

Fullstack Developer

The Catch-All Email is very useful when someone mistype the email addresses. The folders and tags are handy to better organize the received emails.

Digital Marketer

Other encrypted emails such as Tutanota are able to search the content of the emails as well. This is most inconvenient.

IT Expert

I cherish my privacy and ProtonMail helps add an extra layer of protection.

Your data on it is encrypted and very hard to breach. The registration process was extremely quick and painless.

Personal 

This is an alternative of Google mail and yahoo and an easy to use software, ehich you can use with ease in most of your online services.

Principal

But when you run into some difficult, you discover there is NO phone support. When you file a "bug report" you get a response, and usually a tech will response via email in 24 hours.

Owner

My experience has been 100% positive, I integrated my proton account with my custom domain and use it as my business email platform as well as for my personal emails.

After the trial I payes for a subscription and integrated the mail functions with my domain name. I also got ProtonDrive, ProtonVPN and the ProtonCalendar, all secure.

Project Manager

They have paid subscription,however the free version should be enough in itself for most people. You can import your signature or create it on ProtonMail.

They have recently expanded by adding storage to protonmail, which was long needed. Their customer service that used to take ages is getting a bit faster as well.

Proton Mail screenshot: Desktop & Mobile

Proton Mail screenshot: User Admin

Proton Mail screenshot: Mobile Interface

Freelancers

Large Enterprises

Mid Size Business

Non Profit

Small Business

Symantec Email Security.cloud is an anti-spam software designed to help businesses filter unwanted messages and protect the system from email-borne viruses. The platform offers data loss prevention functionality, which enables managers to encrypt and control sensitive data.

Abnormal provides total protection against the widest range of attacks including phishing, malware, ransomware, social engineering, executive impersonation, supply chain compromise, internal account compromise, spam, and graymail.

EasyDMARC is a comprehensive cloud-native platform designed to simplify email authentication and deliverability management. With its intuitive interface, it offers in-depth visibility into users' email ecosystems, allowing them to monitor traffic, analyze authentication results, and protect their domain's reputation.

Microsoft Defender for Office 365 is a cloud-based email security software designed to help businesses automatically detect, investigate, and resolve potential email threats on a centralized platform. Supervisors can configure security policies, perform spoof checks, and maintain a record of reported incidents.

Alerts/Escalation

Allow/Block List

Anti Spam

Data Loss Prevention

Email Routing

Greylisting

Microsoft Outlook Integration

Phishing Protection

Policy Management

Real-Time Monitoring

Spam Detection

Spam Quarantine

SURLB/URIBL Filtering

Microsoft Defender for Office 365

self employed

It's great that for both Windows 8 and Windows 10 you don't need to install an antivirus because your operating system has one built in and cataloged as very good, with Microsoft Defender.

Reporting Specialist

Microsoft Defender its a great option for small companies that are seeking for protection of their information but also offers great features that bigger companies could use.

Freelancer

One great advantage is its simplicity, its ability for automatic scanning on downloads. It also does not require any installation required as it comes built in with windows.

Artist

This software has a few cons because sometimes get viruses that are doesn't detectable it cause some spam and a vulnerable entrance in your files.

I highly recommend using Microsoft Defender to protect your documents and to bring you a peace of mind.

Student 

It has provided a better security for office 365 files in my workplace and personal emails in my business. It is a good application that provides a proper service for users.

Data entry 

Ease of use, speed, safety and trust that this company enjoys.

Supervisor 

Overall I have enjoyed protecting my computer with Microsoft defender. I will continue to use it both in my office and on my home devices.

Network Manager

So far there is nothing about the product itself that I dislike.

When it comes to the latest threats and malware, it is not the most updated antivirus software in the market.

manager

Easy and integrated Easy to learn Suitable for all ages.

freelancer

You can still cheat on emails on a regular basis. The solution is not as powerful as other vendors, and it still poses some security threats.

Counselor

The best part is that the free service came integrated with my computer. No setup really required.

General Manager of multi stages language school 

Light , easy to use , provides a better protection , less cost.

Quality Inspector

Incredible active anti-malware score. Straightforward ransomware assurance.

It’s inexpensive for PCs having windows. Does decent work for daily defense against virus.

Proton Mail vs Microsoft Defender for Office 365 Comparison (2026)

Proton Mail

Microsoft Defender for Office 365

Overview

Video & Screenshots

Pricing

User reviews

Key features

Integrations

Alternatives