# 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** | 263 | 338 | 
| **Largest Market Segment** | Small-Business (58.5% of reviews) | Small-Business (64.8% 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 (119 reviews) | 8.7 (302 reviews) | 
  | **Ease of Use** | 9.0 (241 reviews) | 8.7 (303 reviews) | 
  | **Ease of Setup** | 9.1 (24 reviews) | 8.8 (73 reviews) | 
  | **Ease of Admin** | 9.2 (16 reviews) | 8.4 (58 reviews) | 
  | **Quality of Support** | 8.6 (207 reviews) | 7.9 (221 reviews) | 
  | **Has the product been a good partner in doing business?** | 9.3 (12 reviews) | 8.1 (41 reviews) | 
  | **Product Direction (% positive)** | 9.3 (118 reviews) | 7.6 (300 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

### Email Client

| Product | Score | Reviews |
|---|---|---|
| **Proton Mail For Business** | N/A | N/A |
| **Thunderbird** | 8.6/10 | 121 |

#### Inbox Tools

| Feature | Proton Mail For Business | Thunderbird | 
|---|---|---|
| **Unified Inbox** | Not enough data | 8.9 (103 reviews) | 
| **Filters** | Not enough data | 8.9 (109 reviews) | 
| **Reminders** | Not enough data | 8.5 (96 reviews) | 
| **Notifications** | Not enough data | 8.7 (104 reviews) | 

#### Coordination Tools

| Feature | Proton Mail For Business | Thunderbird | 
|---|---|---|
| **Calendar** | Not enough data | 8.4 (92 reviews) | 
| **Contacts** | Not enough data | 8.6 (100 reviews) | 
| **Task Management** | Not enough data | 8.4 (88 reviews) | 

#### Software Options

| Feature | Proton Mail For Business | Thunderbird | 
|---|---|---|
| **Desktop Application** | Not enough data | 9.2 (110 reviews) | 
| **Mobile Application** | Not enough data | 7.5 (63 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 | Not enough data | 

### Email Management

| Product | Score | Reviews |
|---|---|---|
| **Proton Mail For Business** | N/A | N/A |
| **Thunderbird** | 8.9/10 | 9 |

#### Sorting & Filtering

| Feature | Proton Mail For Business | Thunderbird | 
|---|---|---|
| **Attachment Search** | Not enough data | 9.2 (6 reviews) | 
| **Tags** | Not enough data | 10.0 (7 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) | 

#### 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 | 

#### 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 | 

### Email

| Product | Score | Reviews |
|---|---|---|
| **Proton Mail For Business** | 7.0/10 | 8 |
| **Thunderbird** | N/A | N/A |

#### Generative AI

| Feature | Proton Mail For Business | Thunderbird | 
|---|---|---|
| **AI Text Generation** | 7.1 (8 reviews) | Not enough data | 
| **AI Text Summarization** | 6.9 (8 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** | 8.9/10 | 129 |
| **Thunderbird** | N/A | N/A |

#### Encryption Techniques - Email Encryption

| Feature | Proton Mail For Business | Thunderbird | 
|---|---|---|
| **Encryption Algorithms** | 9.7 (11 reviews) | Not enough data | 
| **Transport Encryption** | 9.5 (7 reviews) | Not enough data | 
| **End-to-End Encryption** | 9.9 (42 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** | 8.7 (10 reviews) | Not enough data | 
| **Digital Signatures** | 9.0 (5 reviews) | Not enough data | 
| **Certificate Authorities** | Not enough data | Not enough data | 

#### Security Enhancements and Auditing - Email Encryption

| Feature | Proton Mail For Business | Thunderbird | 
|---|---|---|
| **Malware Scanning** | 9.0 (5 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** | 8.8 (94 reviews) | Not enough data | 
| **APIs and SDKs** | Feature Not Available | Not enough data | 
| **Email Client Integration** | 6.3 (21 reviews) | Not enough data | 
| **Automation** | 9.3 (12 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** | 58.5% | 64.8% | 
| **Mid-Market** | 28.2% | 24.5% | 
| **Enterprise** | 13.4% | 10.6% | 

### By Industry

#### Proton Mail For Business

- **Information Technology and Services:** 9.4%
- **Computer Software:** 7.1%
- **Computer & Network Security:** 6.3%
- **Internet:** 4.7%
- **Consulting:** 4.3%
- **Higher Education:** 3.9%
- **Hospitality:** 3.9%
- **Design:** 2.8%
- **Marketing and Advertising:** 2.8%
- **Mental Health Care:** 2.8%
- **Other:** 52.0%

#### Thunderbird

- **Information Technology and Services:** 12.7%
- **Computer Software:** 11.8%
- **Internet:** 6.7%
- **Marketing and Advertising:** 5.2%
- **Telecommunications:** 3.0%
- **Higher Education:** 2.7%
- **Consumer Goods:** 2.4%
- **Design:** 2.4%
- **Education Management:** 2.1%
- **Renewables & Environment:** 2.1%
- **Other:** 48.8%

---
## Alternatives

### Alternatives to Proton Mail For Business

- [Spike](https://www.g2.com/products/spike/reviews) — 4.6/5 stars (262 reviews)
- [Google Workspace](https://www.g2.com/products/google-workspace/reviews) — 4.6/5 stars (47954 reviews)
- [Microsoft Outlook](https://www.g2.com/products/microsoft-outlook/reviews) — 4.5/5 stars (3466 reviews)
- [Zoho Mail](https://www.g2.com/products/zoho-mail/reviews) — 4.4/5 stars (713 reviews)
- [Apple Mail](https://www.g2.com/products/apple-mail/reviews) — 3.9/5 stars (157 reviews)
- [Yahoo! Mail](https://www.g2.com/products/yahoo-mail/reviews) — 3.8/5 stars (103 reviews)
- [HEY](https://www.g2.com/products/basecamp-hey/reviews) — 3.9/5 stars (15 reviews)
- [Titan](https://www.g2.com/products/titan-titan/reviews) — 4.6/5 stars (561 reviews)
- [Superhuman Mail](https://www.g2.com/products/superhuman-mail/reviews) — 4.7/5 stars (1236 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 (2463 reviews)
- [Spike](https://www.g2.com/products/spike/reviews) — 4.6/5 stars (262 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 (3466 reviews)
- [Shift](https://www.g2.com/products/redbrick-shift/reviews) — 4.5/5 stars (264 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)
- [K-9 Mail](https://www.g2.com/products/k-9-mail/reviews) — 4.5/5 stars (13 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: [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)