# Proton Mail For Business vs Thunderbird Comparison | | Proton Mail For Business | Thunderbird | |---|---|---| | **Star Rating** | 4.6 out of 5 | 4.3 out of 5 | | **Total Reviews** | 495 | 340 | | **Largest Market Segment** | Small-Business (63.7% of reviews) | Small-Business (65.2% of reviews) | | **Entry Level Price** | Starting at $6.99 1 User Per Month | No pricing available | --- ## Top Pros & Cons ### Proton Mail For Business Pros: - Ease of Use (3 reviews) - Encryption (2 reviews) Cons: - Compatibility Issues (1 reviews) - Complex Processes (1 reviews) ### Thunderbird Pros: - Ease of Use (4 reviews) - Functionality Features (4 reviews) Cons: - Difficult Setup (2 reviews) - Missing Features (2 reviews) --- ## Ratings Comparison | Rating | Proton Mail For Business | Thunderbird | |---|---|---| | **Meets Requirements** | 9.0 (133 reviews) | 8.7 (305 reviews) | | **Ease of Use** | 9.1 (469 reviews) | 8.8 (306 reviews) | | **Ease of Setup** | 9.0 (42 reviews) | 8.8 (76 reviews) | | **Ease of Admin** | 9.2 (24 reviews) | 8.4 (58 reviews) | | **Quality of Support** | 8.9 (371 reviews) | 7.9 (222 reviews) | | **Has the product been a good partner in doing business?** | 9.2 (21 reviews) | 8.1 (41 reviews) | | **Product Direction (% positive)** | 9.1 (130 reviews) | 7.7 (303 reviews) | --- ## Pricing ### Proton Mail For Business #### Entry-Level Pricing Plan: Mail Essentials Price: Starting at $6.99 1 User Per Month Description: Includes these features: Key Features: - 15 GB storage per user - 10 email addresses per user - 3 custom email domains supported [Browse all 3 editions](https://www.g2.com/products/proton-mail-for-business/pricing) #### Free Trial Yes ### Thunderbird #### Entry-Level Pricing No pricing available #### Free Trial No information available --- ## Features Comparison By Category ### Collaboration & Productivity | Product | Score | Reviews | |---|---|---| | **Proton Mail For Business** | N/A | N/A | | **Thunderbird** | N/A | N/A | #### Additional Functionality | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Third-Party Integrations** | Not enough data | Not enough data | | **To-Do List** | Not enough data | Not enough data | | **@mentions** | Not enough data | Not enough data | | **Single Sign On** | Not enough data | Not enough data | | **File Management** | Not enough data | Not enough data | | **Activity Dashboard** | Not enough data | Not enough data | | **Drag & Drop** | Not enough data | Not enough data | | **Alerts/Notifications** | Not enough data | Not enough data | | **Prioritization** | Not enough data | Not enough data | | **Access Controls/Permissions** | Not enough data | Not enough data | | **Screen Sharing** | Not enough data | Not enough data | | **Content Management** | Not enough data | Not enough data | | **Brainstorming** | Not enough data | Not enough data | | **AI Copilot** | Not enough data | Not enough data | | **File Transfer** | Not enough data | Not enough data | | **Calendar Management** | Not enough data | Not enough data | | **Status Tracking** | Not enough data | Not enough data | | **Real-Time Notifications** | Not enough data | Not enough data | | **Version Control** | Not enough data | Not enough data | | **Task Management** | Not enough data | Not enough data | | **Activity Tracking** | Not enough data | Not enough data | | **Real Time Editing** | Not enough data | Not enough data | | **Communication Management** | Not enough data | Not enough data | | **Chat/Messaging** | Not enough data | Not enough data | | **Tagging** | Not enough data | Not enough data | | **Generative AI** | Not enough data | Not enough data | | **Assignment Management** | Not enough data | Not enough data | | **Task Scheduling** | Not enough data | Not enough data | | **Project Management** | Not enough data | Not enough data | | **Collaboration Tools** | Not enough data | Not enough data | | **Workflow Management** | Not enough data | Not enough data | | **Secure Data Storage** | Not enough data | Not enough data | | **File Sharing** | Not enough data | Not enough data | | **Document Storage** | Not enough data | Not enough data | | **Task Progress Tracking** | Not enough data | Not enough data | | **Discussions/Forums** | Not enough data | Not enough data | | **Commenting/Notes** | Not enough data | Not enough data | | **Reporting & Statistics** | Not enough data | Not enough data | | **Contact Management** | Not enough data | Not enough data | | **Video Conferencing** | Not enough data | Not enough data | | **Progress Tracking** | Not enough data | Not enough data | | **Mobile Access** | Not enough data | Not enough data | | **API** | Not enough data | Not enough data | | **Document Management** | Not enough data | Not enough data | | **Customizable Branding** | Not enough data | Not enough data | ### Email Security | Product | Score | Reviews | |---|---|---| | **Proton Mail For Business** | N/A | N/A | | **Thunderbird** | N/A | N/A | #### Additional Functionality | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Phishing Protection** | Not enough data | Not enough data | | **Threat Response** | Not enough data | Not enough data | | **Domain Check** | Not enough data | Not enough data | | **Security Auditing** | Not enough data | Not enough data | | **AI/Machine Learning** | Not enough data | Not enough data | | **Third-Party Integrations** | Not enough data | Not enough data | | **AI Copilot** | Not enough data | Not enough data | | **Reporting/Analytics** | Not enough data | Not enough data | | **Anomaly/Malware Detection** | Not enough data | Not enough data | | **SURLB/URIBL Filtering** | Not enough data | Not enough data | | **Activity Dashboard** | Not enough data | Not enough data | | **Scheduled/Automated Reports** | Not enough data | Not enough data | | **For MSPs** | Not enough data | Not enough data | | **Whitelisting/Blacklisting** | Not enough data | Not enough data | | **Fraud Detection** | Not enough data | Not enough data | | **Spam Blocker** | Not enough data | Not enough data | | **Spam Quarantine** | Not enough data | Not enough data | | **API** | Not enough data | Not enough data | | **Data Leak Prevention** | Not enough data | Not enough data | | **Encryption** | Not enough data | Not enough data | | **Audit Trail** | Not enough data | Not enough data | | **Real-Time Monitoring** | Not enough data | Not enough data | | **Spam Analysis** | Not enough data | Not enough data | | **Policy Management** | Not enough data | Not enough data | | **Alerts/Escalation** | Not enough data | Not enough data | | **Email Management** | Not enough data | Not enough data | | **Vulnerability Scanning** | Not enough data | Not enough data | | **Generative AI** | Not enough data | Not enough data | | **Threat Protection** | Not enough data | Not enough data | | **Email Attachment Protection** | Not enough data | Not enough data | | **Email Filtering** | Not enough data | Not enough data | | **Two-Factor Authentication** | Not enough data | Not enough data | ### Email Client | Product | Score | Reviews | |---|---|---| | **Proton Mail For Business** | N/A | N/A | | **Thunderbird** | 8.5/10 | 124 | #### Inbox Tools | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Unified Inbox** | Not enough data | 8.9 (104 reviews) | | **Filters** | Not enough data | 9.0 (110 reviews) | | **Reminders** | Not enough data | 8.5 (97 reviews) | | **Notifications** | Not enough data | 8.7 (105 reviews) | #### Coordination Tools | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Calendar** | Not enough data | 8.5 (94 reviews) | | **Contacts** | Not enough data | 8.6 (102 reviews) | | **Task Management** | Not enough data | 8.4 (89 reviews) | #### Software Options | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Desktop Application** | Not enough data | 9.2 (111 reviews) | | **Mobile Application** | Not enough data | 7.6 (65 reviews) | #### Email Client - Agentic AI | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | 8.0 (5 reviews) | ### Email Management | Product | Score | Reviews | |---|---|---| | **Proton Mail For Business** | N/A | N/A | | **Thunderbird** | 8.9/10 | 10 | #### Sorting & Filtering | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Attachment Search** | Not enough data | 9.2 (6 reviews) | | **Tags** | Not enough data | 9.8 (8 reviews) | | **AI Sorting** | Not enough data | 8.0 (5 reviews) | | **Predefined Rules** | Not enough data | 9.2 (6 reviews) | #### Integrations | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Microsoft Outlook Integration** | Not enough data | 8.3 (6 reviews) | | **Gmail Integration** | Not enough data | 9.0 (7 reviews) | | **Apple Calendar Integration** | Not enough data | 8.1 (6 reviews) | | **Social Media Integration** | Not enough data | Not enough data | | **Third-Party Integrations** | Not enough data | Not enough data | #### Time Management | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Unified Inbox** | Not enough data | 9.4 (6 reviews) | | **Email Automation** | Not enough data | 8.8 (7 reviews) | | **Snooze** | Not enough data | 9.0 (5 reviews) | #### Generative AI | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **AI Text Generation** | Not enough data | Not enough data | | **AI Text-to-Speech** | Not enough data | Not enough data | | **AI Text Summarization** | Not enough data | Not enough data | | **Generative AI** | Not enough data | Not enough data | #### Agentic AI - Email Management | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | #### Additional Functionality | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Whitelisting/Blacklisting** | Not enough data | Not enough data | | **Customizable Fields** | Not enough data | Not enough data | | **Signature Management** | Not enough data | Not enough data | | **Shared Inboxes** | Not enough data | Not enough data | | **Email Distribution** | Not enough data | Not enough data | | **Prioritization** | Not enough data | Not enough data | | **Customizable Forms** | Not enough data | Not enough data | | **AI Copilot** | Not enough data | Not enough data | | **Mobile App** | Not enough data | Not enough data | | **Routing** | Not enough data | Not enough data | | **Activity Dashboard** | Not enough data | Not enough data | | **Collaboration Tools** | Not enough data | Not enough data | | **Inbox Management** | Not enough data | Not enough data | | **Queue Management** | Not enough data | Not enough data | | **Drag & Drop** | Not enough data | Not enough data | | **Contact Management** | Not enough data | Not enough data | | **Email Marketing** | Not enough data | Not enough data | | **Data Recovery** | Not enough data | Not enough data | | **Archiving & Retention** | Not enough data | Not enough data | | **Real-Time Monitoring** | Not enough data | Not enough data | | **Autoresponders** | Not enough data | Not enough data | | **Multiple User Accounts** | Not enough data | Not enough data | | **API** | Not enough data | Not enough data | | **Real-Time Analytics** | Not enough data | Not enough data | | **Customer Segmentation** | Not enough data | Not enough data | | **Search/Filter** | Not enough data | Not enough data | | **Support Ticket Management** | Not enough data | Not enough data | | **Canned Responses** | Not enough data | Not enough data | | **Workflow Management** | Not enough data | Not enough data | | **Reporting/Analytics** | Not enough data | Not enough data | | **Chat/Messaging** | Not enough data | Not enough data | | **Response Management** | Not enough data | Not enough data | | **Email Templates** | Not enough data | Not enough data | | **Email Monitoring** | Not enough data | Not enough data | | **Campaign Management** | Not enough data | Not enough data | | **Email Tracking** | Not enough data | Not enough data | | **Access Controls/Permissions** | Not enough data | Not enough data | | **Spam Blocker** | Not enough data | Not enough data | | **Alerts/Notifications** | Not enough data | Not enough data | | **Customizable Templates** | Not enough data | Not enough data | | **Real-Time Reporting** | Not enough data | Not enough data | | **Tagging** | Not enough data | Not enough data | | **Campaign Analytics** | Not enough data | Not enough data | | **Workflow Automation** | Not enough data | Not enough data | ### Email | Product | Score | Reviews | |---|---|---| | **Proton Mail For Business** | 6.9/10 | 13 | | **Thunderbird** | N/A | N/A | #### Generative AI | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **AI Text Generation** | 6.8 (12 reviews) | Not enough data | | **AI Text Summarization** | 7.0 (9 reviews) | Not enough data | | **AI Text-to-Speech** | Feature Not Available | Not enough data | | **Autonomous Task Execution** | Feature Not Available | Not enough data | | **Cross-system Integration** | Feature Not Available | Not enough data | | **Proactive Assistance** | Feature Not Available | Not enough data | ### Email Encryption | Product | Score | Reviews | |---|---|---| | **Proton Mail For Business** | 9.1/10 | 337 | | **Thunderbird** | N/A | N/A | #### Encryption Techniques - Email Encryption | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Encryption Algorithms** | 9.8 (20 reviews) | Not enough data | | **Transport Encryption** | 9.8 (19 reviews) | Not enough data | | **End-to-End Encryption** | 9.8 (115 reviews) | Not enough data | #### Authentication, Verification, and Access Controls - Email Encryption | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Revocation Mechanisms** | Not enough data | Not enough data | | **Access Controls** | 9.1 (20 reviews) | Not enough data | | **Digital Signatures** | 9.4 (8 reviews) | Not enough data | | **Certificate Authorities** | 9.3 (5 reviews) | Not enough data | #### Security Enhancements and Auditing - Email Encryption | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **Malware Scanning** | 9.3 (7 reviews) | Not enough data | | **Reporting** | Not enough data | Not enough data | | **Audit Trails** | Feature Not Available | Not enough data | | **Data Loss Prevention (DLP)** | Feature Not Available | Not enough data | #### Integration, Compatibility, and Usability - Email Encryption | Feature | Proton Mail For Business | Thunderbird | |---|---|---| | **User-Friendly Interfaces** | 8.7 (254 reviews) | Not enough data | | **APIs and SDKs** | Feature Not Available | Not enough data | | **Email Client Integration** | 6.5 (40 reviews) | Not enough data | | **Automation** | 9.0 (27 reviews) | Not enough data | --- ## Categories **Unique to Proton Mail For Business (2):** [Email Software](https://www.g2.com/categories/email), [Email Encryption Software](https://www.g2.com/categories/email-encryption) **Unique to Thunderbird (2):** [Email Client Software](https://www.g2.com/categories/email-client), [Email Management Software](https://www.g2.com/categories/email-management) --- ## Reviewer Demographics ### By Company Size | Segment | Proton Mail For Business | Thunderbird | |---|---|---| | **Small-Business** | 63.7% | 65.2% | | **Mid-Market** | 25.1% | 24.3% | | **Enterprise** | 11.2% | 10.5% | ### By Industry #### Proton Mail For Business - **Information Technology and Services:** 10.4% - **Computer Software:** 7.9% - **Mental Health Care:** 6.2% - **Consulting:** 6.0% - **Computer & Network Security:** 4.3% - **Health, Wellness and Fitness:** 3.7% - **Higher Education:** 3.1% - **Internet:** 2.9% - **Marketing and Advertising:** 2.5% - **Non-Profit Organization Management:** 2.5% - **Other:** 50.5% #### Thunderbird - **Information Technology and Services:** 12.9% - **Computer Software:** 11.7% - **Internet:** 6.6% - **Marketing and Advertising:** 5.1% - **Telecommunications:** 3.3% - **Higher Education:** 2.7% - **Consumer Goods:** 2.4% - **Design:** 2.4% - **Education Management:** 2.1% - **Renewables & Environment:** 2.1% - **Other:** 48.6% --- ## Alternatives ### Alternatives to Proton Mail For Business - [Spike](https://www.g2.com/products/spike/reviews) — 4.6/5 stars (261 reviews) - [Google Workspace](https://www.g2.com/products/google-workspace/reviews) — 4.6/5 stars (48208 reviews) - [Microsoft Outlook](https://www.g2.com/products/microsoft-outlook/reviews) — 4.5/5 stars (3537 reviews) - [Zoho Mail](https://www.g2.com/products/zoho-mail/reviews) — 4.4/5 stars (727 reviews) - [Apple Mail](https://www.g2.com/products/apple-mail/reviews) — 3.9/5 stars (159 reviews) - [Yahoo! Mail](https://www.g2.com/products/yahoo-mail/reviews) — 3.9/5 stars (104 reviews) - [HEY](https://www.g2.com/products/basecamp-hey/reviews) — 3.9/5 stars (14 reviews) - [Titan](https://www.g2.com/products/titan-titan/reviews) — 4.6/5 stars (569 reviews) - [Superhuman Mail](https://www.g2.com/products/superhuman-mail/reviews) — 4.7/5 stars (1311 reviews) - [Zimbra Collaboration Enterprise Collaboration](https://www.g2.com/products/zimbra-collaboration-enterprise-collaboration/reviews) — 3.6/5 stars (140 reviews) ### Alternatives to Thunderbird - [Front](https://www.g2.com/products/front/reviews) — 4.7/5 stars (2513 reviews) - [Spike](https://www.g2.com/products/spike/reviews) — 4.6/5 stars (261 reviews) - [Mailbird](https://www.g2.com/products/mailbird/reviews) — 3.6/5 stars (101 reviews) - [BlueMail](https://www.g2.com/products/bluemail/reviews) — 4.3/5 stars (53 reviews) - [Microsoft Outlook](https://www.g2.com/products/microsoft-outlook/reviews) — 4.5/5 stars (3537 reviews) - [Canary Mail](https://www.g2.com/products/canary-mail/reviews) — 4.5/5 stars (53 reviews) - [Shift](https://www.g2.com/products/redbrick-shift/reviews) — 4.4/5 stars (263 reviews) - [eM Client](https://www.g2.com/products/em-client/reviews) — 4.0/5 stars (61 reviews) - [Zimbra Desktop](https://www.g2.com/products/zimbra-desktop/reviews) — 4.4/5 stars (22 reviews) - [Mailspring](https://www.g2.com/products/mailspring/reviews) — 3.8/5 stars (18 reviews) --- ## Top Discussions ### Proton Mail For Business - Title: [Is ProtonMail legitimate?](https://www.g2.com/discussions/is-protonmail-legitimate) — 2 comments > **Top comment:** "Yes, I have been on their paid plan for a few years now. I highly recommend their services. They now have a cloud drive and a great VPN as well." - Title: [What is Protonmail used for?](https://www.g2.com/discussions/protonmail-what-is-protonmail-used-for) — 1 comment > **Top comment:** "Secure cross-platform email." - Title: [Can police track ProtonMail?](https://www.g2.com/discussions/can-police-track-protonmail) — 1 comment > **Top comment:** "From my opinion, police needs special permission to track protonmail, I guess in some cases that police is trying to track protonmail using illegal methods,..." - Title: [When is the launching date of proton drive?](https://www.g2.com/discussions/when-is-the-launching-date-of-proton-drive) — 1 comment, 2 upvotes > **Top comment:** "As the Project Status is still "Under Development", any new information on its release will be added on the ProtonMail Twitter: @ProtonMail. Hope that helps." ### Thunderbird - Title: [Has anyone managed to use the copy and paste function from excell?](https://www.g2.com/discussions/12306-has-anyone-managed-to-use-the-copy-and-paste-function-from-excell) — 2 comments, 1 upvote > **Top comment:** "Strange -- when I do it, the columns and rows are maintained (though some of the formatting is not kept). What version are you using? I'm still using..." - Title: [What is the use of Thunderbird software?](https://www.g2.com/discussions/what-is-the-use-of-thunderbird-software) — 1 comment, 1 upvote > **Top comment:** "It allows you to manage multiple emails in a single window without back and forth switching. That's the main use I found. Besides that, it also has a good..." - Title: [Has anyone managed to use the copy and paste function from excell?](https://www.g2.com/discussions/30110-has-anyone-managed-to-use-the-copy-and-paste-function-from-excell) — 1 comment > **Top comment:** "Thunderbird does not recognize Excel’s formatting the way Outlook can. But, it can recognize formatting from Word. Copy paste from Excel to Word, then from..." --- **Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/proton-mail-for-business-vs-thunderbird)