# Boomerang for Gmail, Thunderbird vs eM Client Comparison

| | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Star Rating** | 4.6 out of 5 | 4.3 out of 5 | 4.0 out of 5 | 
| **Total Reviews** | 423 | 339 | 61 | 
| **Largest Market Segment** | Small-Business (61.6% of reviews) | Small-Business (65.1% of reviews) | Small-Business (46.4% of reviews) | 
| **Entry Level Price** | Free Per Month | No pricing available | FREE for Individuals | 

---
## Top Pros & Cons

### Boomerang for Gmail

Pros:
- Easy Scheduling (3 reviews)
- Reminders (3 reviews)

Cons:
- Poor Interface Design (2 reviews)
- Time-Consuming (2 reviews)

### Thunderbird

Pros:
- Functionality Features (4 reviews)
- Ease of Use (3 reviews)

Cons:
- Difficult Setup (2 reviews)
- Missing Features (2 reviews)

### eM Client

Pros:
- Ease of Use (2 reviews)
- User Interface (2 reviews)

Cons:
- Lack of Integration (1 reviews)
- Missing Features (1 reviews)

---
## Ratings Comparison
| Rating | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
  | **Meets Requirements** | 9.1 (342 reviews) | 8.7 (304 reviews) | 8.5 (48 reviews) | 
  | **Ease of Use** | 9.1 (346 reviews) | 8.7 (305 reviews) | 8.8 (50 reviews) | 
  | **Ease of Setup** | 9.1 (60 reviews) | 8.8 (75 reviews) | 9.5 (10 reviews) | 
  | **Ease of Admin** | 9.1 (55 reviews) | 8.4 (58 reviews) | 8.1 (7 reviews) | 
  | **Quality of Support** | 8.8 (173 reviews) | 7.9 (222 reviews) | 7.8 (42 reviews) | 
  | **Has the product been a good partner in doing business?** | 9.4 (49 reviews) | 8.1 (41 reviews) | 7.8 (6 reviews) | 
  | **Product Direction (% positive)** | 8.7 (338 reviews) | 7.6 (302 reviews) | 9.0 (46 reviews) | 

---
## Pricing

### Boomerang for Gmail

#### Entry-Level Pricing

Plan: Basic (our free plan)

Price: Free Per Month

Description: Free Trial

Key Features:
- Message Credits - 10 per month
- Supported Accounts - Gmail/G Suite (Google Apps)
- Send Later	

[Browse all 5 editions](https://www.g2.com/products/boomerang-for-gmail/pricing)

#### Free Trial

Yes

### Thunderbird

#### Entry-Level Pricing

No pricing available

#### Free Trial

No information available

### eM Client

#### Entry-Level Pricing

Plan: eM Client Free License

Price: FREE for Individuals

Description: Download the Free version of eM Client with limited functionality. 

Key Features:
- Non-commercial use only 
- Max. 2 email accounts
- Email, Calendar and Task management

[Browse all 3 editions](https://www.g2.com/products/em-client/pricing)

#### Free Trial

Yes

---
## Features Comparison By Category

### Email Client

| Product | Score | Reviews |
|---|---|---|
| **Boomerang for Gmail** | N/A | N/A |
| **Thunderbird** | 8.5/10 | 123 |
| **eM Client** | 8.5/10 | 23 |

#### Inbox Tools

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Unified Inbox** | Not enough data | 8.9 (104 reviews) | 8.5 (20 reviews) | 
| **Filters** | Not enough data | 8.9 (109 reviews) | 8.8 (21 reviews) | 
| **Reminders** | Not enough data | 8.5 (96 reviews) | 8.3 (20 reviews) | 
| **Notifications** | Not enough data | 8.7 (104 reviews) | 8.3 (20 reviews) | 

#### Coordination Tools

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Calendar** | Not enough data | 8.4 (93 reviews) | 8.8 (22 reviews) | 
| **Contacts** | Not enough data | 8.6 (101 reviews) | 8.3 (21 reviews) | 
| **Task Management** | Not enough data | 8.4 (89 reviews) | 8.3 (17 reviews) | 

#### Software Options

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Desktop Application** | Not enough data | 9.2 (111 reviews) | 8.9 (22 reviews) | 
| **Mobile Application** | Not enough data | 7.6 (64 reviews) | Feature Not Available | 

#### Email Client - Agentic AI

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | Not enough data | 
| **Cross-system Integration** | Not enough data | 8.0 (5 reviews) | Not enough data | 

### Online Appointment Scheduling

| Product | Score | Reviews |
|---|---|---|
| **Boomerang for Gmail** | 7.6/10 | 104 |
| **Thunderbird** | N/A | N/A |
| **eM Client** | N/A | N/A |

#### Notifications

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Confirmations & Reminders** | 8.9 (92 reviews) | Not enough data | Not enough data | 
| **Appointment Follow-Up** | Feature Not Available | Not enough data | Not enough data | 
| **Scheduling Notifications** | 9.0 (90 reviews) | Not enough data | Not enough data | 

#### Settings

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Time Zone Detection** | Feature Not Available | Not enough data | Not enough data | 
| **Availability Settings** | 8.9 (93 reviews) | Not enough data | Not enough data | 
| **Blocked Time Settings** | 8.9 (90 reviews) | Not enough data | Not enough data | 

#### Personalization

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Branding** | Feature Not Available | Not enough data | Not enough data | 
| **Links** | 8.5 (73 reviews) | Not enough data | Not enough data | 

#### Integrations

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Multi- Calendar Integration** | 8.7 (76 reviews) | Not enough data | Not enough data | 
| **Website Integration** | 7.5 (52 reviews) | Not enough data | Not enough data | 
| **Payment Acceptance** | Feature Not Available | Not enough data | Not enough data | 
| **Video Conferencing** | 7.2 (52 reviews) | Not enough data | Not enough data | 
| **Communication** | Feature Not Available | Not enough data | Not enough data | 

#### Generative AI

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **AI Text Generation** | 6.3 (44 reviews) | Not enough data | Not enough data | 
| **AI Text Summarization** | 6.5 (43 reviews) | Not enough data | Not enough data | 
| **AI Text-to-Image** | 6.2 (43 reviews) | Not enough data | Not enough data | 
| **AI Text-to-Speech** | 6.1 (43 reviews) | Not enough data | Not enough data | 
| **AI Image-to-Text** | 6.0 (43 reviews) | Not enough data | Not enough data | 

#### Agentic AI - Online Appointment Scheduling

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | Not enough data | 
| **Multi-step Planning** | Not enough data | Not enough data | Not enough data | 
| **Natural Language Interaction** | Not enough data | Not enough data | Not enough data | 

### Email Management

| Product | Score | Reviews |
|---|---|---|
| **Boomerang for Gmail** | 7.5/10 | 67 |
| **Thunderbird** | 8.9/10 | 9 |
| **eM Client** | N/A | N/A |

#### Sorting & Filtering

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Attachment Search** | Feature Not Available | 9.2 (6 reviews) | Not enough data | 
| **Tags** | Feature Not Available | 10.0 (7 reviews) | Not enough data | 
| **AI Sorting** | Feature Not Available | 8.0 (5 reviews) | Not enough data | 
| **Predefined Rules** | Feature Not Available | 9.2 (6 reviews) | Not enough data | 

#### Integrations

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Microsoft Outlook Integration** | Feature Not Available | 8.3 (6 reviews) | Not enough data | 
| **Gmail Integration** | 9.6 (64 reviews) | 9.0 (7 reviews) | Not enough data | 
| **Apple Calendar Integration** | Feature Not Available | 8.1 (6 reviews) | Not enough data | 

#### Time Management

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Unified Inbox** | Feature Not Available | 9.4 (6 reviews) | Not enough data | 
| **Email Automation** | 8.8 (52 reviews) | 8.8 (7 reviews) | Not enough data | 
| **Snooze** | 8.5 (54 reviews) | 9.0 (5 reviews) | Not enough data | 

#### Generative AI

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **AI Text Generation** | 6.1 (28 reviews) | Not enough data | Not enough data | 
| **AI Text-to-Speech** | 5.7 (28 reviews) | Not enough data | Not enough data | 
| **AI Text Summarization** | 6.4 (28 reviews) | Not enough data | Not enough data | 

#### Agentic AI - Email Management

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

### Google Workspace Office Tools

| Product | Score | Reviews |
|---|---|---|
| **Boomerang for Gmail** | N/A | N/A |
| **Thunderbird** | N/A | N/A |
| **eM Client** | N/A | N/A |

#### Agentic AI - Google Workspace Office Tools

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | Not enough data | 
| **Multi-step Planning** | Not enough data | Not enough data | Not enough data | 
| **Cross-system Integration** | Not enough data | Not enough data | Not enough data | 

### Email Tracking

| Product | Score | Reviews |
|---|---|---|
| **Boomerang for Gmail** | 7.8/10 | 205 |
| **Thunderbird** | N/A | N/A |
| **eM Client** | N/A | N/A |

#### Agentic AI - Email Tracking

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | Not enough data | 
| **Multi-step Planning** | Not enough data | Not enough data | Not enough data | 
| **Cross-system Integration** | Not enough data | Not enough data | Not enough data | 
| **Adaptive Learning** | Not enough data | Not enough data | Not enough data | 
| **Natural Language Interaction** | Not enough data | Not enough data | Not enough data | 
| **Proactive Assistance** | Not enough data | Not enough data | Not enough data | 
| **Decision Making** | Not enough data | Not enough data | Not enough data | 

#### Analytics

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Open Rates** | Feature Not Available | Not enough data | Not enough data | 
| **Link Activity** | 8.2 (110 reviews) | Not enough data | Not enough data | 
| **Attachment Activity** | Feature Not Available | Not enough data | Not enough data | 

#### Customizations

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Email Platform Integration** | Feature Not Available | Not enough data | Not enough data | 
| **Email Scheduling** | 9.5 (194 reviews) | Not enough data | Not enough data | 
| **Notifications** | 8.8 (169 reviews) | Not enough data | Not enough data | 
| **Email Categorization** | Feature Not Available | Not enough data | Not enough data | 
| **Templates** | Feature Not Available | Not enough data | Not enough data | 

#### Generative AI

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **AI Text Generation** | 4.6 (20 reviews) | Not enough data | Not enough data | 

### Appointment Reminder

| Product | Score | Reviews |
|---|---|---|
| **Boomerang for Gmail** | 9.2/10 | 58 |
| **Thunderbird** | N/A | N/A |
| **eM Client** | N/A | N/A |

#### Features

| Feature | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Standalone Booking** | 9.1 (53 reviews) | Not enough data | Not enough data | 
| **Integrated App** | 9.0 (40 reviews) | Not enough data | Not enough data | 
| **SMS** | Feature Not Available | Not enough data | Not enough data | 
| **Email** | 9.2 (49 reviews) | Not enough data | Not enough data | 
| **Voice** | Feature Not Available | Not enough data | Not enough data | 
| **Confirmation and Cancellation** | 9.4 (47 reviews) | Not enough data | Not enough data | 

---
## Categories

**Unique to Boomerang for Gmail (5):** [Appointment Reminder Software](https://www.g2.com/categories/appointment-reminder), [Google Workspace Office Tools ](https://www.g2.com/categories/google-workspace-office-tools), [Email Tracking Software](https://www.g2.com/categories/email-tracking), [Online Appointment Scheduling Software](https://www.g2.com/categories/online-appointment-scheduling), [Email Management Software](https://www.g2.com/categories/email-management)

**Unique to Thunderbird (2):** [Email Client Software](https://www.g2.com/categories/email-client), [Email Management Software](https://www.g2.com/categories/email-management)

**Unique to eM Client (1):** [Email Client Software](https://www.g2.com/categories/email-client)


---
## Reviewer Demographics

### By Company Size

| Segment | Boomerang for Gmail | Thunderbird | eM Client | 
|---|---|---|---|
| **Small-Business** | 61.6% | 65.1% | 46.4% | 
| **Mid-Market** | 28.3% | 24.4% | 35.7% | 
| **Enterprise** | 10.1% | 10.5% | 17.9% | 

### By Industry

#### Boomerang for Gmail

- **Marketing and Advertising:** 11.7%
- **Computer Software:** 7.8%
- **Education Management:** 6.3%
- **Information Technology and Services:** 5.1%
- **Non-Profit Organization Management:** 4.9%
- **Higher Education:** 4.6%
- **Internet:** 3.2%
- **Public Relations and Communications:** 2.9%
- **Financial Services:** 2.9%
- **Management Consulting:** 2.7%
- **Other:** 48.1%

#### Thunderbird

- **Information Technology and Services:** 13.0%
- **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:** 48.5%

#### eM Client

- **Information Technology and Services:** 38.6%
- **Computer Software:** 19.3%
- **Marketing and Advertising:** 7.0%
- **Industrial Automation:** 5.3%
- **Retail:** 3.5%
- **Writing and Editing:** 3.5%
- **Publishing:** 1.8%
- **Music:** 1.8%
- **Management Consulting:** 1.8%
- **Internet:** 1.8%
- **Other:** 15.8%

---
## Alternatives

### Alternatives to Boomerang for Gmail

- [Vendasta Yesware](https://www.g2.com/products/vendasta-yesware/reviews) — 4.4/5 stars (821 reviews)
- [Mixmax](https://www.g2.com/products/mixmax/reviews) — 4.6/5 stars (1457 reviews)
- [Gmelius](https://www.g2.com/products/gmelius/reviews) — 4.4/5 stars (776 reviews)
- [GMass](https://www.g2.com/products/gmass/reviews) — 4.7/5 stars (1298 reviews)
- [HubSpot Sales Hub](https://www.g2.com/products/hubspot-sales-hub/reviews) — 4.4/5 stars (13815 reviews)
- [GReminders](https://www.g2.com/products/greminders/reviews) — 4.6/5 stars (682 reviews)
- [Saleshandy](https://www.g2.com/products/saleshandy/reviews) — 4.6/5 stars (775 reviews)
- [Cirrus Insight](https://www.g2.com/products/cirrus-insight/reviews) — 4.2/5 stars (1510 reviews)
- [Brevo Marketing Platform](https://www.g2.com/products/brevo-marketing-platform/reviews) — 4.5/5 stars (2569 reviews)
- [YouCanBookMe](https://www.g2.com/products/youcanbookme/reviews) — 4.7/5 stars (1934 reviews)

### Alternatives to Thunderbird

- [Front](https://www.g2.com/products/front/reviews) — 4.7/5 stars (2466 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 (3481 reviews)
- [Shift](https://www.g2.com/products/redbrick-shift/reviews) — 4.5/5 stars (264 reviews)
- [Canary Mail](https://www.g2.com/products/canary-mail/reviews) — 4.5/5 stars (53 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)

### Alternatives to eM Client

- [Microsoft Outlook](https://www.g2.com/products/microsoft-outlook/reviews) — 4.5/5 stars (3481 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)
- [Mailspring](https://www.g2.com/products/mailspring/reviews) — 3.8/5 stars (18 reviews)
- [Front](https://www.g2.com/products/front/reviews) — 4.7/5 stars (2466 reviews)
- [Shift](https://www.g2.com/products/redbrick-shift/reviews) — 4.5/5 stars (264 reviews)
- [Kiwi for Gmail](https://www.g2.com/products/kiwi-for-gmail-kiwi-for-gmail/reviews) — 4.4/5 stars (58 reviews)
- [Superhuman Mail](https://www.g2.com/products/superhuman-mail/reviews) — 4.7/5 stars (1251 reviews)
- [Zoom Workplace](https://www.g2.com/products/zoom-workplace/reviews) — 4.5/5 stars (56398 reviews)

---
## Top Discussions

### Boomerang for Gmail

- Title: [Is it Possible to use in Other Mailing Platform](https://www.g2.com/discussions/is-it-possible-to-use-in-other-mailing-platform) — 5 comments, 1 upvote
  > **Top comment:** "Boomerang is available on the desktop through the www. Android devices, iOS devices version 10 and up,  Hope that helps"
- Title: [What is Boomerang for Gmail used for?](https://www.g2.com/discussions/what-is-boomerang-for-gmail-used-for) — 1 comment
  > **Top comment:** "I love the features that let me schedule meetings directly from email. It cuts down on the back and forth so much! If you schedule a lot of interviews for..."
- Title: [How to automate different replies regarding the sender or type of answer?](https://www.g2.com/discussions/15597-how-to-automate-different-replies-regarding-the-sender-or-type-of-answer) — 1 comment, 1 upvote
  > **Top comment:** "1. Open an existing thread. Or write and send a new email to someone, then open that new message in your Sent Mail folder.

2. Open a reply to the..."

### 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..."

### eM Client

- Title: [Is eM client any good?](https://www.g2.com/discussions/is-em-client-any-good) — 3 comments
  > **Top comment:** "emClient  is a very solid option as an email client. Easy-to-use and support is decent."
- Title: [Is eM client really free?](https://www.g2.com/discussions/is-em-client-really-free) — 2 comments
  > **Top comment:** "Yea, I use it with two email accounts and it’s free,i think that is the limit though. More accounts is what causes it to charge. I’ve not found any features..."
- Title: [What is eM Client used for?](https://www.g2.com/discussions/what-is-em-client-used-for) — 1 comment
  > **Top comment:** "eM Client is used as a full-featured email and collaboration client to manage emails, calendars, contacts, and tasks in one place. It supports Exchange,..."

---
**Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/boomerang-for-gmail-vs-thunderbird-vs-em-client)