# Kiwi for Gmail vs Thunderbird Comparison

---
## Frequently Asked Questions

### What is the difference between Thunderbird vs Kiwi for Gmail?

Kiwi for Gmail stands out for its higher Ease of Use and Setup scores, while Thunderbird is noted for its open-source flexibility and strong multi-account management.

| [Thunderbird](https://www.g2.com/products/thunderbird/reviews) | [Kiwi for Gmail](https://www.g2.com/products/kiwi-for-gmail-kiwi-for-gmail/reviews) |
| --- | --- |
| 4.3/5 (340 reviews) | 4.4/5 (58 reviews) |
| Small-Business | Small-Business |
| 8.8 | 9.3 |
| 7.9 | 8.3 |
| Ease of Use (4 all-time mentions) | Ease of Use (3 all-time mentions) |



### How do the pricing models of Thunderbird and Kiwi for Gmail compare?

Thunderbird is considered the stronger value due to its free, open-source model and high satisfaction with cost, while Kiwi for Gmail receives mixed value sentiment due to its subscription changes.

- **Thunderbird:** Reviewers consistently highlight Thunderbird as totally free, open-source, and delivering strong ROI for business email management.
- **Kiwi for Gmail:** Recent reviews note frustration with the shift to a subscription model, with some expressing dissatisfaction over new recurring charges.
- **Switching reasons:** Reviewers mention moving to Thunderbird to avoid subscription fees and to gain more flexibility in email management.



### What are the best alternatives to Thunderbird and Kiwi for Gmail?

The top 3 alternatives to Thunderbird and Kiwi for Gmail are Shift, Front, and Spike.

| Product | G2 Rating (reviews) | Largest Segment | Pricing Insight | Top Reviewer-Cited Strength |
| --- | --- | --- | --- | --- |
| [Thunderbird](https://www.g2.com/products/thunderbird/reviews) | 4.3/5 (340 reviews) | Small-Business | Free, open-source, strong ROI | Ease of Use (4 all-time mentions) |
| [Kiwi for Gmail](https://www.g2.com/products/kiwi-for-gmail-kiwi-for-gmail/reviews) | 4.4/5 (58 reviews) | Small-Business | Subscription model, mixed value sentiment | Ease of Use (3 all-time mentions) |
| [Shift](https://www.g2.com/products/redbrick-shift/reviews) | 4.5/5 (265 reviews) | Small-Business | — | Multi-account management |
| [Front](https://www.g2.com/products/front/reviews) | 4.7/5 (2507 reviews) | Small-Business | — | Collaboration features |
| [Spike](https://www.g2.com/products/spike/reviews) | 4.6/5 (262 reviews) | Small-Business | — | Conversational email interface |



### Which Email Client features should I prioritize when comparing Thunderbird and Kiwi for Gmail?

Buyers comparing Thunderbird and Kiwi for Gmail should prioritize Ease of Use, Multi-Account Management, Calendar Integration, Customization, and Security.

- **Ease of Use:** Thunderbird (4 all-time mentions), Kiwi for Gmail (3 all-time mentions), with Kiwi for Gmail scoring 9.7 and Thunderbird 8.8 on Ease of Use.
- **Multi-Account Management:** Thunderbird is frequently praised for handling multiple accounts and unified inboxes; Kiwi for Gmail is highlighted for easy switching between multiple Gmail accounts.
- **Calendar Integration:** Both products are cited for calendar features, but reviewers note Thunderbird's robust recurring event handling and Kiwi for Gmail's native Google Calendar access.
- **Customization:** Thunderbird is recognized for its open-source extensibility and add-ons, while Kiwi for Gmail is noted for its clean, native Google Workspace experience.
- **Security:** Thunderbird receives positive mentions for privacy and encryption features (2 all-time mentions).



### What are the pros and cons of Thunderbird vs Kiwi for Gmail?

Thunderbird's headline strength is its open-source flexibility and multi-account management, while Kiwi for Gmail is praised for its intuitive interface and Google Workspace integration.

- **Thunderbird strengths:** Ease of Use (4 all-time mentions), Functionality Features (4), Security (2), Inbox Management (2), Efficiency (2), Cross-Platform Compatibility (1), Customization and add-ons.
- **Thunderbird trade-offs:** Difficult Setup (2 all-time mentions), Missing Features (2), Sync Issues (2), occasional confusing interface and resource usage.
- **Kiwi for Gmail strengths:** Ease of Use (3 all-time mentions), Intuitive (2), Time-saving, clean user interface, strong Google Workspace integration, easy multi-account switching.
- **Kiwi for Gmail trade-offs:** Privacy Concerns (1 all-time mention), subscription model dissatisfaction, limited to Google accounts, occasional resource usage concerns.



### Is Thunderbird or Kiwi for Gmail better for small businesses?

Thunderbird is the better fit for small businesses, with a strong small-business segment and consistent reviewer satisfaction for cost and flexibility.

- **Thunderbird:** Largest segment is Small-Business; reviewers highlight its free, open-source model and robust multi-account management as ideal for small business needs.
- **Kiwi for Gmail:** Largest segment is Small-Business; reviewers appreciate its ease of use and Google Workspace integration, but note limitations for businesses needing non-Google account support.



### Which Email Client platform has better integrations?

Reviewers rate Thunderbird and Kiwi for Gmail at parity for integrations, with no clear leader based on recent review mentions.

- **Thunderbird:** Reviewers mention integration with calendar, contacts, and tasks, but no third-party integration tools are cited in recent reviews.
- **Kiwi for Gmail:** Reviewers highlight integration with Google Workspace apps (Gmail, Calendar, Drive, Docs, Sheets), but no third-party integration tools are cited in recent reviews.



### How do Thunderbird and Kiwi for Gmail compare on customer support?

Kiwi for Gmail holds a modest lead in Quality of Support, scoring 8.3 versus Thunderbird's 7.9, a difference above the materiality threshold.

- **Thunderbird:** Reviewers describe support as community-driven, with helpful forums and documentation but limited direct support channels.
- **Kiwi for Gmail:** Reviewers note responsive customer service and fast problem resolution, with several citing positive experiences in recent reviews.



### Which is easier to implement, Thunderbird or Kiwi for Gmail?

Kiwi for Gmail is easier to implement, with an Ease of Setup score of 9.3 compared to Thunderbird's 8.8.

- **Thunderbird:** Reviewers mention a learning curve and occasional manual setup steps, but praise the onboarding improvements and documentation.
- **Kiwi for Gmail:** Reviewers consistently highlight quick setup, minimal learning curve, and immediate usability for Google account holders.



### Which product has better Calendar?

Kiwi for Gmail is favored for Calendar, with reviewers highlighting its native Google Calendar integration and ease of access.

- **Thunderbird:** Reviewers note robust recurring event handling and calendar integration, but mention occasional sync challenges and reliance on add-ons for advanced features.
- **Kiwi for Gmail:** Reviewers consistently praise the seamless access to Google Calendar within the app, with positive sentiment for managing events and schedules alongside email.



| | Kiwi for Gmail | Thunderbird | 
|---|---|---|
| **Star Rating** | 4.4 out of 5 | 4.3 out of 5 | 
| **Total Reviews** | 58 | 340 | 
| **Largest Market Segment** | Small-Business (80.0% of reviews) | Small-Business (65.2% of reviews) | 
| **Entry Level Price** | $2.75 Per Month | No pricing available | 

---
## Top Pros & Cons

### Kiwi for Gmail

Pros:
- Ease of Use (3 reviews)
- Intuitive (2 reviews)

Cons:
- Privacy Concerns (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 | Kiwi for Gmail | Thunderbird | 
|---|---|---|
  | **Meets Requirements** | 9.1 (37 reviews) | 8.7 (305 reviews) | 
  | **Ease of Use** | 9.7 (37 reviews) | 8.8 (306 reviews) | 
  | **Ease of Setup** | 9.3 (10 reviews) | 8.8 (76 reviews) | 
  | **Ease of Admin** | 9.4 (9 reviews) | 8.4 (58 reviews) | 
  | **Quality of Support** | 8.3 (29 reviews) | 7.9 (222 reviews) | 
  | **Has the product been a good partner in doing business?** | 9.3 (7 reviews) | 8.1 (41 reviews) | 
  | **Product Direction (% positive)** | 9.1 (37 reviews) | 7.7 (303 reviews) | 

---
## Pricing

### Kiwi for Gmail

#### Entry-Level Pricing

Plan: Kiwi for Gmail Standard

Price: $2.75 Per Month

Description: Kiwi for Gmail Standard - Best for users who want to manage only one Gmail or Google Workspace Account.

Key Features:
- Support for 1 Email Account (Gmail, Google Workspace)
- Cross Platform Support (Windows, Mac)
- Clean Compose Windows

[Browse all 3 editions](https://www.g2.com/products/kiwi-for-gmail-kiwi-for-gmail/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 |
|---|---|---|
| **Kiwi for Gmail** | N/A | N/A |
| **Thunderbird** | N/A | N/A |

#### Additional Functionality

| Feature | Kiwi for Gmail | 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 Client

| Product | Score | Reviews |
|---|---|---|
| **Kiwi for Gmail** | 9.2/10 | 29 |
| **Thunderbird** | 8.5/10 | 124 |

#### Inbox Tools

| Feature | Kiwi for Gmail | Thunderbird | 
|---|---|---|
| **Unified Inbox** | 9.7 (26 reviews) | 8.9 (104 reviews) | 
| **Filters** | 9.1 (28 reviews) | 9.0 (110 reviews) | 
| **Reminders** | 9.0 (17 reviews) | 8.5 (97 reviews) | 
| **Notifications** | 8.8 (25 reviews) | 8.7 (105 reviews) | 

#### Coordination Tools

| Feature | Kiwi for Gmail | Thunderbird | 
|---|---|---|
| **Calendar** | 9.5 (25 reviews) | 8.5 (94 reviews) | 
| **Contacts** | 9.3 (21 reviews) | 8.6 (102 reviews) | 
| **Task Management** | 8.5 (11 reviews) | 8.4 (89 reviews) | 

#### Software Options

| Feature | Kiwi for Gmail | Thunderbird | 
|---|---|---|
| **Desktop Application** | 9.7 (29 reviews) | 9.2 (111 reviews) | 
| **Mobile Application** | Feature Not Available | 7.6 (65 reviews) | 

#### Email Client - Agentic AI

| Feature | Kiwi for Gmail | 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 |
|---|---|---|
| **Kiwi for Gmail** | N/A | N/A |
| **Thunderbird** | 8.9/10 | 10 |

#### Sorting & Filtering

| Feature | Kiwi for Gmail | 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 | Kiwi for Gmail | 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 | Kiwi for Gmail | 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 | Kiwi for Gmail | 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 | Kiwi for Gmail | Thunderbird | 
|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | 
| **Cross-system Integration** | Not enough data | Not enough data | 

#### Additional Functionality

| Feature | Kiwi for Gmail | 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 | 

---
## Categories
**Shared Categories (1):** [Email Client Software](https://www.g2.com/categories/email-client)


**Unique to Thunderbird (1):** [Email Management Software](https://www.g2.com/categories/email-management)


---
## Reviewer Demographics

### By Company Size

| Segment | Kiwi for Gmail | Thunderbird | 
|---|---|---|
| **Small-Business** | 80.0% | 65.2% | 
| **Mid-Market** | 18.0% | 24.3% | 
| **Enterprise** | 2.0% | 10.5% | 

### By Industry

#### Kiwi for Gmail

- **Marketing and Advertising:** 18.4%
- **Information Technology and Services:** 12.2%
- **Computer Software:** 8.2%
- **Management Consulting:** 6.1%
- **Health, Wellness and Fitness:** 6.1%
- **Consulting:** 4.1%
- **Real Estate:** 4.1%
- **Publishing:** 4.1%
- **Non-Profit Organization Management:** 4.1%
- **Financial Services:** 4.1%
- **Other:** 28.6%

#### 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 Kiwi for Gmail

- [Shift](https://www.g2.com/products/redbrick-shift/reviews) — 4.4/5 stars (263 reviews)
- [Microsoft Outlook](https://www.g2.com/products/microsoft-outlook/reviews) — 4.5/5 stars (3536 reviews)
- [Spike](https://www.g2.com/products/spike/reviews) — 4.6/5 stars (261 reviews)
- [eM Client](https://www.g2.com/products/em-client/reviews) — 4.0/5 stars (61 reviews)
- [Front](https://www.g2.com/products/front/reviews) — 4.7/5 stars (2513 reviews)
- [Mailbird](https://www.g2.com/products/mailbird/reviews) — 3.6/5 stars (101 reviews)
- [Missive](https://www.g2.com/products/missive/reviews) — 4.7/5 stars (854 reviews)
- [Superhuman Mail](https://www.g2.com/products/superhuman-mail/reviews) — 4.7/5 stars (1308 reviews)
- [Zoom Workplace](https://www.g2.com/products/zoom-workplace/reviews) — 4.5/5 stars (56622 reviews)
- [Microsoft 365](https://www.g2.com/products/microsoft365/reviews) — 4.6/5 stars (5866 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 (3536 reviews)
- [Shift](https://www.g2.com/products/redbrick-shift/reviews) — 4.4/5 stars (263 reviews)
- [Canary Mail](https://www.g2.com/products/canary-mail/reviews) — 4.5/5 stars (53 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

### Kiwi for Gmail

- Title: [Is Kiwi for Gmail free?](https://www.g2.com/discussions/is-kiwi-for-gmail-free) — 2 comments
  > **Top comment:** "They have a Standard plan at around $2/mo."
- Title: [Is Kiwi for Gmail good?](https://www.g2.com/discussions/is-kiwi-for-gmail-good) — 2 comments *(includes official response)*
  > **Top comment:** "It is INCREDIBLE. Would highly recommend to anyone looking to improve productivity, for either themself or their team."
- Title: [What is Google's Kiwi?](https://www.g2.com/discussions/what-is-google-s-kiwi) — 1 comment *(includes official response)*
  > **Top comment:** "Kiwi for Gmail is not affiliated with Google - it is a Google Cloud Partner application that takes Google Workspace and Gmail and transforms them into..."
- Title: [can it support office 365](https://www.g2.com/discussions/49507-can-it-support-office-365) — 1 comment, 1 upvote
  > **Top comment:** "I have invested with some scam brokers in the past, and the story is as horrific as the ones i have read because i went through the ordeal myself. I lost..."
- Title: [How do i](https://www.g2.com/discussions/43416-how-do-i) — 1 comment, 1 upvote
  > **Top comment:** "Sorry Andi, Could you rephrase your question? We would love to help!
"

### 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/kiwi-for-gmail-kiwi-for-gmail-vs-thunderbird)