# Mailshake vs Seamless (formally Seamless.AI) Comparison
---
## AI Generated Summary
- **G2 reviewers report** that Mailshake excels in **ease of use** , with many users highlighting its quick learning curve and intuitive design. One user mentioned they could go from concept to campaign in just one day, making it a great choice for those who need to hit the ground running.
- **Users say** that Seamless (formally Seamless.AI) stands out for its **lead generation capabilities** , particularly with its user-friendly search filters and browser extension that simplifies the process of pulling contact information from company websites. This feature has been described as "heaven" for users needing quick access to leads.
- **Reviewers mention** that while Mailshake offers a powerful email campaign tool, it may not have the same depth of **data accuracy** as Seamless. Users of Seamless appreciate the high quality of phone numbers and emails, which is crucial for effective outreach.
- **According to verified reviews** , Mailshake's **customer support** receives high praise, with users noting quick email responses and effective AI support within the app. This level of support can be a significant advantage for users who may need assistance during their campaigns.
- **G2 reviewers highlight** that Seamless has a broader **market presence** and a larger user base, which can be beneficial for those looking for a well-established tool. With over 5,300 reviews, users feel more confident in the reliability and ongoing development of the software.
- **Users report** that Mailshake's focus on **campaign management** allows for unlimited campaigns and contacts, which is a major plus for small businesses looking to scale their outreach efforts without being bogged down by unnecessary features.



| | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Star Rating** | 4.7 out of 5 | 4.4 out of 5 | 
| **Total Reviews** | 371 | 5,330 | 
| **Largest Market Segment** | Small-Business (90.9% of reviews) | Small-Business (64.0% of reviews) | 
| **Entry Level Price** | $99.00 10 Mail Accounts Per Month | Free Trial | 

---
## Top Pros & Cons

### Mailshake

Pros:
- Ease of Use (35 reviews)
- Time-saving (26 reviews)

Cons:
- Missing Features (8 reviews)
- Integration Issues (5 reviews)

### Seamless (formally Seamless.AI)

Pros:
- Contact Information (1162 reviews)
- Ease of Use (1138 reviews)

Cons:
- Inaccurate Data (407 reviews)
- Outdated Contacts (292 reviews)

---
## Ratings Comparison
| Rating | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
  | **Meets Requirements** | 9.1 (266 reviews) | 8.4 (4773 reviews) | 
  | **Ease of Use** | 9.1 (275 reviews) | 8.8 (4915 reviews) | 
  | **Ease of Setup** | 9.1 (172 reviews) | 8.9 (3931 reviews) | 
  | **Ease of Admin** | 9.3 (101 reviews) | 8.7 (1256 reviews) | 
  | **Quality of Support** | 9.4 (246 reviews) | 8.5 (4214 reviews) | 
  | **Has the product been a good partner in doing business?** | 9.5 (94 reviews) | 8.5 (1250 reviews) | 
  | **Product Direction (% positive)** | 9.1 (259 reviews) | 8.7 (4791 reviews) | 

---
## Pricing

### Mailshake

#### Entry-Level Pricing

Plan: Sales Engagement

Price: $99.00 10 Mail Accounts Per Month

Key Features:
- 10 Email Addresses
- 5 Phone Numbers
- Power Phone Dialer

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

#### Free Trial

No

### Seamless (formally Seamless.AI)

#### Entry-Level Pricing

Plan: Free Trial

Price: Free Trial

Description: Get 50 Free Credits and Try it for Yourself! 

Key Features:
- Verified Emails, Cell Phones and Direct Dials For Everyone You Need to Sell to
- Download our Free Chrome Extension 
- Search Anywhere on the Web, Including LinkedIn Sales Navigator 

[Browse all 4 editions](https://www.g2.com/products/seamless-formally-seamless-ai/pricing)

#### Free Trial

Yes

---
## Features Comparison By Category

### Sales Intelligence

| Product | Score | Reviews |
|---|---|---|
| **Mailshake** | 7.5/10 | 18 |
| **Seamless (formally Seamless.AI)** | 7.6/10 | 3059 |

#### Data Availability

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Contact Data Availability** | 7.7 (10 reviews) | 8.4 (2992 reviews) | 
| **Company Data Availability** | 7.8 (10 reviews) | 8.4 (2927 reviews) | 
| **Industry Research Availability** | 6.5 (9 reviews) | 8.0 (2826 reviews) ✓ Verified | 
| **Technographic Data Availability** | 6.7 (8 reviews) | 7.7 (2037 reviews) | 

#### Data Accuracy

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Contact Data Accuracy** | 7.4 (9 reviews) | 7.6 (2925 reviews) | 
| **Company Data Accuracy** | 7.0 (10 reviews) | 8.0 (2858 reviews) | 
| **Technographic Data Accuracy** | 7.1 (7 reviews) | 7.7 (2028 reviews) | 

#### Agentic AI - Sales Intelligence

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Autonomous Task Execution** | Not enough data | 6.3 (145 reviews) | 
| **Cross-system Integration** | Not enough data | 7.5 (144 reviews) | 
| **Adaptive Learning** | Not enough data | 6.3 (144 reviews) | 
| **Natural Language Interaction** | Not enough data | 6.4 (145 reviews) | 
| **Proactive Assistance** | Not enough data | 6.4 (145 reviews) | 
| **Decision Making** | Not enough data | 6.7 (145 reviews) | 

#### Platform

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Internationalization** | 8.6 (14 reviews) | 7.7 (2293 reviews) | 
| **User, Role, and Access Management** | 9.0 (14 reviews) | 8.3 (2382 reviews) ✓ Verified | 
| **Performance and Reliability** | 9.0 (16 reviews) | 8.5 (2465 reviews) | 
| **Reporting/Dashboards** | 8.7 (15 reviews) | Feature Not Available | 
| **Mobile User Support** | 8.1 (14 reviews) | 7.5 (2241 reviews) ✓ Verified | 
| **APIs** | 7.8 (13 reviews) | 7.8 (2258 reviews) | 

#### Features

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Lead Builder** | 7.7 (10 reviews) | 8.4 (2783 reviews) | 
| **Integration to CRM/Marketing Automation** | 6.3 (9 reviews) | 8.2 (2700 reviews) | 
| **Data Cleaning/Enrichment** | 8.3 (11 reviews) | 7.8 (2670 reviews) ✓ Verified | 
| **Data Segmentation/Filtering** | 6.7 (10 reviews) | 8.0 (2693 reviews) ✓ Verified | 
| **Search** | 7.2 (10 reviews) | 8.5 (2863 reviews) ✓ Verified | 
| **News/People Alerts** | 6.3 (10 reviews) | 7.2 (2520 reviews) ✓ Verified | 
| **Connections** | 6.1 (9 reviews) | 7.7 (2593 reviews) ✓ Verified | 
| **Reporting** | 7.8 (9 reviews) | Feature Not Available | 
| **Messaging** | 8.5 (8 reviews) | Feature Not Available | 

### Lead Generation

| Product | Score | Reviews |
|---|---|---|
| **Mailshake** | N/A | N/A |
| **Seamless (formally Seamless.AI)** | N/A | N/A |

#### Lead Generation

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Lead Builder** | Not enough data | Not enough data | 
| **CRM Integration** | Not enough data | Not enough data | 
| **Marketing Automation Integration** | Not enough data | Not enough data | 
| **Social Media Integration** | Not enough data | Not enough data | 
| **Data Import & Export Tools** | Not enough data | Not enough data | 

### Sales Engagement

| Product | Score | Reviews |
|---|---|---|
| **Mailshake** | 7.7/10 | 190 |
| **Seamless (formally Seamless.AI)** | N/A | N/A |

#### Integrated Workflows

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Task Management** | 8.3 (134 reviews) ✓ Verified | Not enough data | 
| **Email Tracking/Automation** | 9.2 (184 reviews) ✓ Verified | Not enough data | 
| **Calls and Voice** | 7.5 (93 reviews) | Not enough data | 
| **Other Outreach Options ** | 7.9 (122 reviews) | Not enough data | 
| **CRM Integration** | 8.2 (125 reviews) ✓ Verified | Not enough data | 
| **Calendar** | 8.0 (113 reviews) | Not enough data | 
| **Shared Records** | 8.0 (110 reviews) | Not enough data | 

#### Repeatability and Reportability

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Content Management** | 8.3 (123 reviews) | Not enough data | 
| **Workflow Management** | 8.6 (140 reviews) ✓ Verified | Not enough data | 
| **Workflow Performance** | 8.7 (111 reviews) | Not enough data | 
| **Sales Coaching and Insights** | Feature Not Available | Not enough data | 
| **Gamification** | 7.2 (101 reviews) | Not enough data | 

#### AI and Automation

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Lead Prioritization** | 8.1 (125 reviews) | Not enough data | 
| **Lead Scoring** | 8.1 (118 reviews) | Not enough data | 
| **Best Time of Day Scheduling** | 8.5 (132 reviews) | Not enough data | 
| **Buyer Intelligence** | 7.7 (106 reviews) | Not enough data | 
| **Machine Learning** | 7.5 (108 reviews) | Not enough data | 

#### Generative AI

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **AI Text Generation** | 7.3 (56 reviews) | Not enough data | 

#### Agentic AI - Sales Engagement

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Autonomous Task Execution** | 6.8 (21 reviews) | Not enough data | 
| **Multi-step Planning** | 7.1 (21 reviews) | Not enough data | 
| **Cross-system Integration** | 7.1 (21 reviews) | Not enough data | 
| **Adaptive Learning** | 6.7 (21 reviews) | Not enough data | 
| **Natural Language Interaction** | 6.7 (21 reviews) | Not enough data | 
| **Proactive Assistance** | 6.6 (20 reviews) | Not enough data | 
| **Decision Making** | 6.4 (21 reviews) | Not enough data | 

### Buyer Intent Data Providers

| Product | Score | Reviews |
|---|---|---|
| **Mailshake** | N/A | N/A |
| **Seamless (formally Seamless.AI)** | 8.2/10 | 774 |

#### Data Availability

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Contact Data Availability** | Not enough data | 8.4 (767 reviews) | 
| **Account Data Availability** | Not enough data | 8.4 (764 reviews) | 
| **Offline Data** | Not enough data | Feature Not Available | 

#### Platform Additional Functionality

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Integrations** | Not enough data | 8.4 (748 reviews) | 
| **Topic Customization** | Not enough data | 8.2 (726 reviews) | 
| **Natural Language Processing (NLP)** | Not enough data | 8.0 (713 reviews) | 
| **Alerts** | Not enough data | 7.8 (710 reviews) | 
| **Real-time Intent** | Not enough data | 7.9 (717 reviews) | 

### Lead Intelligence

| Product | Score | Reviews |
|---|---|---|
| **Mailshake** | N/A | N/A |
| **Seamless (formally Seamless.AI)** | 8.2/10 | 3249 |

#### Lead Intelligence

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Lead Validation** | Not enough data | 8.0 (3160 reviews) | 
| **Lead Enrichment** | Not enough data | 8.0 (3097 reviews) | 
| **Lead Quality** | Not enough data | 7.9 (3186 reviews) | 
| **Lead Analysis** | Not enough data | 7.8 (3041 reviews) | 
| **Browser Extension** | Not enough data | 8.6 (3115 reviews) | 

#### Agentic AI - Lead Intelligence

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Cross-system Integration** | Not enough data | 8.6 (91 reviews) | 

### Lead Capture

| Product | Score | Reviews |
|---|---|---|
| **Mailshake** | N/A | N/A |
| **Seamless (formally Seamless.AI)** | 9.2/10 | 44 |

#### Lead Monitoring

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Features** | Not enough data | 9.4 (39 reviews) | 
| **Performance** | Not enough data | 9.3 (38 reviews) | 
| **Identification** | Not enough data | 9.1 (39 reviews) | 

#### Agentic AI - Lead Capture

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Cross-system Integration** | Not enough data | 9.2 (33 reviews) | 
| **Proactive Assistance** | Not enough data | 8.8 (32 reviews) | 

#### Data Capture

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Mobile** | Not enough data | 9.0 (38 reviews) | 
| **Websites** | Not enough data | 9.2 (38 reviews) | 
| **Social Media** | Not enough data | 8.9 (39 reviews) | 
| **Data** | Not enough data | 9.3 (38 reviews) | 

#### Analytics

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Export/Import** | Not enough data | 9.3 (36 reviews) | 
| **Reporting** | Not enough data | 9.2 (37 reviews) | 

#### Customization

| Feature | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Forms** | Not enough data | 9.1 (36 reviews) | 
| **Personalization** | Not enough data | 9.2 (36 reviews) | 
| **Templates** | Not enough data | 9.1 (35 reviews) | 
| **Integration** | Not enough data | 9.3 (35 reviews) | 

---
## Categories
**Shared Categories (1):** [Sales Intelligence Software](https://www.g2.com/categories/sales-intelligence)

**Unique to Mailshake (1):** [Sales Engagement Software](https://www.g2.com/categories/sales-engagement)

**Unique to Seamless (formally Seamless.AI) (3):** [Lead Intelligence Software](https://www.g2.com/categories/lead-intelligence), [Buyer Intent Data Providers](https://www.g2.com/categories/buyer-intent-data-providers), [Lead Capture Software](https://www.g2.com/categories/lead-capture)


---
## Reviewer Demographics

### By Company Size

| Segment | Mailshake | Seamless (formally Seamless.AI) | 
|---|---|---|
| **Small-Business** | 90.9% | 64.0% | 
| **Mid-Market** | 8.3% | 29.2% | 
| **Enterprise** | 0.8% | 6.8% | 

### By Industry

#### Mailshake

- **Marketing and Advertising:** 28.2%
- **Computer Software:** 10.6%
- **Information Technology and Services:** 9.5%
- **Financial Services:** 3.4%
- **Consulting:** 2.8%
- **Internet:** 2.2%
- **Real Estate:** 2.2%
- **Education Management:** 2.0%
- **Entertainment:** 1.7%
- **Staffing and Recruiting:** 1.7%
- **Other:** 35.8%

#### Seamless (formally Seamless.AI)

- **Information Technology and Services:** 14.0%
- **Computer Software:** 12.8%
- **Marketing and Advertising:** 11.6%
- **Consulting:** 4.2%
- **Staffing and Recruiting:** 4.0%
- **Financial Services:** 3.7%
- **Logistics and Supply Chain:** 2.7%
- **Telecommunications:** 2.1%
- **Computer & Network Security:** 2.0%
- **Manufacturing:** 2.0%
- **Other:** 40.8%

---
## Alternatives

### Alternatives to Mailshake

- [Reply](https://www.g2.com/products/reply/reviews) — 4.6/5 stars (1542 reviews)
- [Apollo.io](https://www.g2.com/products/apollo-io/reviews) — 4.7/5 stars (9648 reviews)
- [Outreach](https://www.g2.com/products/outreach/reviews) — 4.3/5 stars (3569 reviews)
- [Mixmax](https://www.g2.com/products/mixmax/reviews) — 4.6/5 stars (1457 reviews)
- [Vendasta Yesware](https://www.g2.com/products/vendasta-yesware/reviews) — 4.4/5 stars (821 reviews)
- [Klenty](https://www.g2.com/products/klenty/reviews) — 4.6/5 stars (388 reviews)
- [Salesloft](https://www.g2.com/products/salesloft/reviews) — 4.5/5 stars (4287 reviews)
- [HubSpot Sales Hub](https://www.g2.com/products/hubspot-sales-hub/reviews) — 4.4/5 stars (13806 reviews)
- [Instantly](https://www.g2.com/products/instantly/reviews) — 4.8/5 stars (4094 reviews)
- [lemlist](https://www.g2.com/products/lemlist/reviews) — 4.6/5 stars (1578 reviews)

### Alternatives to Seamless (formally Seamless.AI)

- [Apollo.io](https://www.g2.com/products/apollo-io/reviews) — 4.7/5 stars (9648 reviews)
- [GTM Workspace - Powered by ZoomInfo](https://www.g2.com/products/gtm-workspace-powered-by-zoominfo/reviews) — 4.5/5 stars (9092 reviews)
- [Lusha](https://www.g2.com/products/lusha/reviews) — 4.3/5 stars (1653 reviews)
- [SalesIntel](https://www.g2.com/products/salesintel/reviews) — 4.3/5 stars (539 reviews)
- [Lead411](https://www.g2.com/products/lead411/reviews) — 4.5/5 stars (478 reviews)
- [RocketReach](https://www.g2.com/products/rocketreach/reviews) — 4.4/5 stars (1362 reviews)
- [LeadIQ](https://www.g2.com/products/leadiq/reviews) — 4.2/5 stars (1175 reviews)
- [6sense Sales Intelligence](https://www.g2.com/products/6sense-sales/reviews) — 4.0/5 stars (947 reviews)
- [UpLead](https://www.g2.com/products/uplead/reviews) — 4.7/5 stars (821 reviews)
- [Clearbit](https://www.g2.com/products/clearbit/reviews) — 4.4/5 stars (633 reviews)

---
## Top Discussions

### Mailshake

- Title: [How much does Mailshake cost?](https://www.g2.com/discussions/how-much-does-mailshake-cost) — 3 comments
  > **Top comment:** "You'll have to visit their website milkshake.com for their current pricing"
- Title: [What is Lemlist?](https://www.g2.com/discussions/what-is-lemlist) — 2 comments *(includes official response)*
  > **Top comment:** "While Mailshake and Lemlist have some similar functionality, we can only speak for our successful customers here at Mailshake who love our simple-to-use..."
- Title: [How do you use Mailshake?](https://www.g2.com/discussions/how-do-you-use-mailshake) — 2 comments, 1 upvote *(includes official response)*
  > **Top comment:** "Mailshake is designed to be easy to use and setup. We've actually outlined everything you need to get setup and start sending your first campaign. Check out..."
- Title: [What is Mailshake used for?](https://www.g2.com/discussions/what-is-mailshake-used-for) — 1 comment
  > **Top comment:** "Cold outreach "
- Title: [What does Mailshake do?](https://www.g2.com/discussions/what-does-mailshake-do) — 1 comment
  > **Top comment:** "Allows you to send to many people in a list from your gmail."

### Seamless (formally Seamless.AI)

- Title: [What is Seamless.ai used for?](https://www.g2.com/discussions/what-is-seamless-ai-used-for) — 4 comments, 2 upvotes
  > **Top comment:** "Finding leads across various industries. Their technology, only 30% accurate, in my experience, delivers phone numbers and email for cold sales calls...."
- Title: [Is seamless Ai legal?](https://www.g2.com/discussions/is-seamless-ai-legal) — 4 comments
  > **Top comment:** "If using Seamless is wrong then I do not want to be right... Of course it is legal.  I use it daily, a great tool to dig deeper into a company and learn more..."
- Title: [What does seamless AI do?](https://www.g2.com/discussions/what-does-seamless-ai-do) — 4 comments
  > **Top comment:** "Seamless AI helps me find the right team members to contact, also it gives me a overview of the other co-works that can also be very helpful. "
- Title: [Is anyone else having problems with email accuracy (bounce) levels?](https://www.g2.com/discussions/is-anyone-else-having-problems-with-email-accuracy-bounce-levels) — 2 comments, 1 upvote
  > **Top comment:** "Yes I have that problem. I create my list and then run it through third party email verification services. I use a service I found on Fiverr. Very cheap...."
- Title: [How do you narrow down geography in the Seamless Ai application](https://www.g2.com/discussions/42938-how-do-you-narrow-down-geography-in-the-seamless-ai-application) — 2 comments, 2 upvotes
  > **Top comment:** "Radius"

---
**Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/mailshake-vs-seamless-formally-seamless-ai)