Smartlead vs Mailshake vs Overloop, Which One is Better in “Closing The Deal”!

Capturing the attention of potential customers with cold emails have become difficult with the increase in digital landscape. That is where cold emailing software tools came in the game and save us from the hassle.

As much writing impactful cold emails are important for driving sales success in your business as big is the role of these tools which provide us with different features to work with. They enhance and make the marketing altogether effective by with their easy to use and unique features. 

But choosing the right tool for your business has also become equally difficult because of endless choices. And with this increasing concussion you might get easily deflected what you want exactly for your business. 

To save you from making a wrong decision we bring you a detailed analysis of these tools with all the updated information. 


  • Smartlead is considered best when it comes to easy and smooth deliverability, Email outreach, and growth of a business with an unmatchable customer support. It helps the most in creating business-to-business leads as cold email is used by businesses as a defined strategy to acquire customers. It provides some of the best features such as auto-rotating email accounts, a centralized master inbox, email warm-ups, email personalization and validation, spintex, custom CRM and dynamic IP address. All in all it has it all. 
  • Mailshake is a cloud-based email marketing tool that helps to manage email automation and the generation of leads. It is used by businesses to manage cold emails or email marketing. It generates customized responses and follow-up emails, increasing the effectiveness of the businesses. It also manages business outreach and is a useful tool for generating leads effectively.
  • Overloop is a versatile tool for list building, contact management, and outbound outreach. It offers features such as email finding, contact extraction, LinkedIn integration, personalized lists, omnichannel campaigns, email tracking, sales automation, customizable pipelines, conversation management, and native integrations with popular platforms like Gmail, Outlook, Salesforce, HubSpot, Calendly, and Slack.


Smartlead Cold Outreach Software

It is a powerful and comprehensive email marketing tool with the most features and the best support, trusted and validated by clients. 

Smartlead is considered best when it comes to easy and smooth deliverability, Email outreach, and growth of a business.  

It provides some of the best features such as auto-rotating email accounts, a centralized master inbox, email warm-ups, email personalization and validation, spintex, custom CRM and dynamic IP address. 

It has all in one place so that any business does not lose another conversion. 

It helps the most in creating business-to-business leads as cold email is used by businesses as a defined strategy to acquire customers.  

What’s Smartlead Best For? 

Unlimited rotating emails

  • It provides unlimited rotating emails which increases efficiency and saves a lot of time. 

Centralized master inbox

  • It helps to manage everything from one dashboard.
  • It provides a Shared Team Inbox for increased team collaboration, prospect & non-prospect categorization, and reply sentiment reports.
  • A shared team inbox helps in avoiding conflicting situations such as two different sales executives chasing the same lead.
  • One can easily track email open rate, reply rate, etc. to measure the response better and make the necessary changes according to it. 
Smartlead G2 reviews

Unlimited Email warm-up 

  • It provides unlimited email warmups which are AI-automated, making sure that the emails always land in the lead's inbox increasing the outreach. 

Email personalization

  • It provides highly personalized emails making sure to convert potential prospects into customers.    

Multichannel outreach  

  • It provides Multichannel outreach via channels such as LinkedIn, Email, WhatsApp, SMS, and Calls which leads to the generation of customers and expansion of the business. 

Email validation 

  • It provides Email validation detecting any invalid and undeliverable email addresses and detecting if the domain provided is reliable or not - adding efficiency to businesses.  
  • It also improves the sender's reputation by automatically detecting and moving mail sent to the spam inboxes in the primary inbox. 
Smartlead G2 client reviews


  • Provides Spintex for personalizing boring cold emails with unique email content during the email marketing campaign
  • The emails are auto-customized for each prospect during campaigns which increases the chance of lead conversions. 

Dynamic IP address per campaign 

  • Smartlead offers unique IP servers for every new campaign that it sends out. 
  • This feature helps to add security and feasibility for its users as they can access it from anywhere. 
  • It also improves deliverability because of the high email volume and shared domains. 
  • It also helps in containing the impact of a mistake made by a business as there are multiple users of dynamic domains. 

Smartlead has been highly valued by its customers in terms of the support and quick responses they get from the team. 

It is super easy to set up and has almost every necessary feature making the client stick to it. It’s the best in the process of advancing its features from time to time and making it more relevant for its customers according to their requirements. 


Mailshake is a versatile tool for omnichannel outreach, combining cold emails, LinkedIn, and cold calling. It offers follow-up automation, customizable templates, and trigger-based emails. Mailshake enhances deliverability, analyzes spam and sender scores, and optimizes domain settings. It integrates with popular CRM and productivity tools, provides real-time data metrics, A/B testing, and a Data Finder tool for prospecting. Mailshake includes an AI email writing tool, SHAKEspeare, and a user-friendly Chrome extension.

Milkshake Cold Outreach Software

Mailshake is an email automation tool that helps sales teams to supercharge their email campaigns and drive meaningful connections with their audience. This tool offers an intuitive campaign builder to create and manage personalized email campaigns. You can also access customizable email templates and integration with popular CRMs and productivity tools such as Salesforce, HubSpot, and Google Workspace. With its campaign builder, advanced personalization options, analytics, integrations, email deliverability tools, and automated follow-ups, empowers you to execute effective email campaigns, nurture relationships, and drive more sales.  

What’s Mailshake’s Best for? 

Mailshake for Omnichannel Outreach

  • Mailshake lets you run multichannel outreach combining cold emails, LinkedIn, and cold calling. You can send LinkedIn messages, create sequences, visit profiles, and send connection requests to your prospects. 
  • Mailshake allows you to set follow-up automation for your cold outreach campaigns. It also offers you a repository of customizable follow-up email templates. Moreover, you can set trigger-based follow-up emails to automate the entire sales flow. 
  • Within Mailshake, you can add recipients to a campaign individually or in bulk by uploading a CSV file/Spreadsheet.

Mailshake for Deliverability

  • Once you connect your existing/new email account, Mailshake’s warm up tool automatically works on increasing the sender reputation by opening, replying, and removing emails from spam. 
  • You can analyze your spam score and sender score to ensure landing in leads’ inboxes. 
  • The email deliverability setup tool checks your domain for optimal delivery such as DKIM, SPF, and DMARC records. 
  • SHAKEspeare, the AI email writing tool, can write personalized email copies for you in minutes. It can generate up to 3 variations of the same email.  

Mailshake for Prospecting and Integrations

  • Mailshake offers a plethora of native integration with other CRM and productivity tools such as HubSpot, Salesforce, Pipedrive, GSuite, Outlook, Calendly, Zoho, SMTP, Slack, LinkedIn, etc.
  • This cold outreach tool also offers a Chrome extension. 
  • Mailshake offers real time access to data metrics such as opens, clicks, and replies for every campaign. Moreover, you can A/B test (split test) your individual emails as well as entire campaigns to ensure better results. 
  • The Data Finder tool lets you find prospects based on company names, locations, and job roles. Within Mailshake, you can identify your leads and start cadences in one place. 


Overloop is a versatile tool for list building, contact management, and outbound outreach. It offers features such as email finding, contact extraction, LinkedIn integration, personalized lists, omnichannel campaigns, email tracking, sales automation, customizable pipelines, conversation management, and native integrations with popular platforms like Gmail, Outlook, Salesforce, HubSpot, Calendly, and Slack.

Overloop Cold Outreach Software

Overloop is a sales automation platform that offers cold email and LinkedIn automation. The Overloop Inbox manages all the outreach conversations in one place. It offers ‘dynamic smart segments’ to organize email list contacts. Besides sending personalized cold emails at scale, Overloop works with LinkedIn Sales Navigator to create contacts. In addition, you can generate and nurture leads and find the right audience for your business, all in one platform. 

What’s Overloop Best for? 

Overloop for List Building and Contact Management

  • Overloop comes with an email finder that finds the missing email addresses of your contacts. Moreover, it offers a Chrome extension so you can extract contacts from anywhere. 
  • You can directly import contacts from LinkedIn; Overloop works with both LinkedIn Basic and LinkedIn Sales navigator. Besides, you can import contacts from spreadsheets/CSV from CRMs like HubSpot, Salseforce, Pipedrive, etc. 
  • Using the dynamic smart segment, you can organize and manage your contact lists. Overloop lets you personalize your contact lists with custom fields.

Overloop for Outbound 

  • With Overloop, you can create omnichannel outreach mixing follow-up emails, LinkedIn actions, and manual actions (calling, etc.). 
  • The LinkedIn automation feature lets you visit profiles, send connection requests and direct messages at scale. Plus, you can connect your email address and send cold emails with {{variables}} to personalize your outreach. 
  • Overloop offers comprehensive tracking of your emails – email open rates, visits, reply rates, bounces, etc. You can even track automatic replies or out-of-office replies. In addition, Overloop lets you send your emails as replies to previous emails (same thread), so you can always maintain context. 

Overloop for Sales Engagement

  • You can automate daunting manual tasks with Overloop to speed up the sales process. It offers a fully customizable sales pipeline to track your deals. 
  • Overloop offers a Conversation Inbox to manage all your outbound conversations with prospects and leads in one dashboard. Plus, you can assign conversations among your team members, which helps in easy collaboration. 
  • Overloop offers native integrations, including Google (Gmail and Google Workspace), Outlook, Salesforce, hubSpot, Calendly, Slack, etc. 

How Affordable Are They?

Smartlead Pricing 

Smartlead Pricing Plans

It has two separate plans monthly and annually both are slightly different in pricing and features provided in them. 

Free Trial is provided for both Basic and Popular plan in both the monthly and yearly plans. The free trial provides users with a pre-insight.  

  • Basic plan : $39/month
  • Popular plan: $79/month 
  • Pro plan: $94/month 
  • Custom plan: Fully customizable pricing 

Mailshake Pricing


Milkshake Pricing Plans
  • Email Outreach: $58/month/user
  • Sales Engagement: $83/month/user

Data Finder

Milkshake Pricing Plans
  • Free
  • Starter: $49/month
  • Pro: $99/month 
  • Enterprise: $249/month 

Overloop Pricing

Overloop offers a 14-day free trial or a demo call to help customers choose the right plan for them. 

Overloop Pricing Plans
  • $99/user/month
  • Custom Pricing 


In this article we have comprehensively analyzed and discussed all the tools. Their very best features, reviews, and pricing. 

You have all the necessary details and information at one place in a crystalline way to choose what's best for you. 

We hope it helped you in the search of what you were looking for. 

Frequently asked questions

General Questions

What is Smartlead's cold email outreach software?

Email automation FAQs- Smartlead

Smartlead's cold email outreach tool helps businesses scale their outreach efforts seamlessly. With unlimited mailboxes, fully automated email warmup functionality, a multi-channel infrastructure, and a user-friendly unibox, it empowers users to manage their entire revenue cycle in one place. Whether you're looking to streamline cold email campaigns with automated email warmups, personalization fields, automated mailbox rotation, easy integrations, and spintax, improve productivity, or enhance scalability with subsequences based on lead’s intentions, automated replies, and full white-label experience, our cold email tool implifies it in a single solution.

How does the "unlimited mailboxes" feature benefit me?

Email automation FAQs- Smartlead

Our "unlimited mailboxes" feature allows you to expand your email communications without restrictions imposed by a mailbox limit. This means you won't be constrained by artificial caps on the number of mailboxes you can connect and use. This feature makes Smartlead the best cold email software and empowers you to reach a wider audience, engage with more potential customers, and manage diverse email campaigns effectively.

What do you mean by "unibox to handle your entire revenue cycle"?

Email automation FAQs- Smartlead

The "unibox" is one of the unique features of Smartlead cold email outreach tool, and it's a game-changer when it comes to managing your revenue cycle. The master inbox or the unibox consolidates all your outreach channels, responses, sales follow-ups, and conversions into one centralized, user-friendly mailbox.

With the "unibox," you gain the ability to:
1. Focus on closing deals: You can now say goodbye to the hassle of logging into multiple mailboxes to search for replies. The "unibox" streamlines your sales communication, allowing you to focus on what matters most—closing deals.

2. Centralized lead management: All your leads are managed from one central location, simplifying lead tracking and response management. This ensures you take advantage of every opportunity and efficiently engage with your prospects.

3. Maintain context: The "unibox" provides a 360-degree view of all your customer messages, allowing you to maintain context and deliver more personalized and effective responses.

How does Smartlead ensure my emails don't land in the spam folder?

Email automation FAQs- Smartlead

Smartlead, the best cold email marketing tool, ensures your emails reach the intended recipients' primary inbox rather than the spam folder. 

Here's how it works:
1. Our "unlimited warmups" feature is designed to build and maintain a healthy sending reputation for your cold email outreach. Instead of sending a large volume of emails all at once, which can trigger spam filters, we gradually ramp up your sending volume. This gradual approach, combined with positive email interactions, helps boost your email deliverability rates.

2. We deploy high-deliverability IP servers specific to each campaign. 

3. The ‘Warmup’ feature replicates humanized email sending patterns, spintax, and smart replies.
4. By establishing a positive sender reputation and gradually increasing the number of sent emails, Smartlead minimizes the risk of your emails being flagged as spam. This way, you can be confident that your messages will consistently land in the primary inbox, increasing the likelihood of engagement and successful communication with your recipients.

Can I integrate Smartlead with other tools I'm using?

Email automation FAQs- Smartlead

Certainly, Smartlead is designed for seamless integration with a wide range of tools and platforms. Smartlead offers integration with HubSpot, Salesforce, Pipedrive, Clay, Listkit, and more. You can leverage webhooks and APIs to integrate the tools you use. Try Now!

Email automation FAQs- Smartlead

What type of businesses sees the most success with Smartlead?

No, there are no limitations on the number of channels you can utilize with Smartlead. Our multi-channel infrastructure is designed to be limitless, allowing you to reach potential customers through multiple avenues without constraints.

This flexibility empowers you to diversify your cold email outreach efforts, connect with your audience through various communication channels, and increase your chances of conversion. Whether email, social media, SMS, or other communication methods, Smartlead's multi-channel capabilities ensure you can choose the channels that best align with your outreach strategy and business goals. This way, you can engage with your prospects effectively and maximize the impact of your email outreach.

Email automation FAQs- Smartlead

Do you provide me with lead sources?

Smartlead distinguishes itself from other cold email outreach software by focusing on limitless scalability and seamless integration. While many similar tools restrict your outreach capabilities, Smartlead offers a different approach.

Here's what makes us uniquely the best cold email software:

1. Unlimited Mailboxes: In contrast to platforms that limit mailbox usage, Smartlead provides unlimited mailboxes. This means you can expand your outreach without any arbitrary constraints.

2. Unique IP Servers: Smartlead offers unique IP servers for every campaign it sends out. 

3. Sender Reputation Protection: Smartlead protects your sender reputation by auto-moving emails from spam folders to the primary inbox. This tool uses unique identifiers to cloak all warmup emails from being recognized by automation parsers. 

4. Automated Warmup: Smartlead’s warmup functionality enhances your sender reputation and improves email deliverability by maintaining humanized email sending patterns and ramping up the sending volume. 

5. Multi-Channel Emphasis: Smartlead places a strong emphasis on multi-channel outreach. You can reach your prospects where they are with the LinkedIn outreach feature.   With Smartlead’s cold email automation software, you're always one step ahead in your outreach efforts, enjoying the freedom to scale your initiatives and seamlessly integrate with other tools—all while maintaining a focus on maximizing the impact of your outreach.

Email automation FAQs- Smartlead

How secure is my data with Smartlead?

Ensuring the security of your data is Smartlead's utmost priority. We implement robust encryption methods and stringent security measures to guarantee the continuous protection of your information. Your data's safety is paramount to us, and we are always dedicated to upholding the highest standards of security.

How can I get started with Smartlead?

Email automation FAQs- Smartlead

Getting started with Smartlead is straightforward! Just head over to our sign-up page and follow our easy step-by-step guide. If you ever have any questions or need assistance, our round-the-clock support team is ready to help, standing by to provide you with any assistance you may require. Sign Up Now!

How can I reach the Smartlead team?

Email automation FAQs- Smartlead

We're here to assist you! You can easily get in touch with our dedicated support team on chat. We strive to provide a response within 24 hours to address any inquiries or concerns you may have.

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