Smartlead Vs. Overloop Vs. Which is Best for Your Business?

Are you looking for an email outreach tool? 

If that’s the case, you've come to the right place! In this comparison article, we'll be taking a closer look at three popular players in the game: Overloop,, and Smartlead. 

These tools are designed to boost your email campaign performance and help you reach your audience with precision and finesse. 

Whether you're a sales professional, a marketer, or just someone looking to boost their email game, we'll break down the key features and benefits of each tool to help you make an informed decision. 

So, let's get started and find out which one suits your needs best!


  • Overloop is a sales automation platform with a 4.3/5 rating. It aims to automate cold emailing and LinkedIn outreach messages. It helps you build and manage contact lists. Using this tool, you can create omnichannel campaigns, track email performance, and maintain contextual conversations. Overloop also offers sales engagement features. It integrates seamlessly with popular tools like Google, Outlook, Salesforce, and Slack.
  • MailRush is a versatile tool with a 3.3/4 rating on It excels in email warm-up, improving deliverability by gradually increasing sending volume. As an ESP and cold emailing tool, it ensures effective B2B outreach and protects the sender's reputation. The software automates follow-ups, scheduling and pausing sequences based on recipient actions. MailRush optimizes email engagement and deliverability, making campaigns more efficient.
  • Smartlead is a powerful tool known for email deliverability and lead generation with a 4.9/5 rating on Using natural AI conversations, Smartlead builds a strong sender reputation and safeguards emails from spam folders with unlimited warm-ups. It offers Smart-Adjust to defend live campaigns against low reply rates. With its cold emailing API infrastructure, you can automate lead generation. Overall, it's a comprehensive solution to boost your outreach and drive results.


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. is a specialized software designed for cold email campaigns. It offers automated follow-up capabilities using its SMTP service. 

This software is popular as a dedicated Cold Email ESP (Email Service Provider) for B2B outreach. It provides a distinct approach to cold email marketing, focusing on efficient and targeted communication for business-to-business campaigns.

What is Best for

MailRush has a 3.3 rating on and 4.2 on Capterra. Here are some of its best features. 

Email Warm-Up

  • MailRush takes care of both the initial email engagement and maintaining ongoing engagement. To support this, they offer an email warming feature included in all their paid plans. 
  • This feature helps ensure that emails are delivered successfully by gradually increasing sending volume and establishing a positive sender reputation with ESPs. 
  • Email warm-up enhances email deliverability and optimizes the effectiveness of email campaigns. It is definitely one of the best features of MailRush. 

Email Service Provider

  • The best thing about MailRush is that—it is both an ESP and a cold emailing tool. Its parent company, Cyber Cast Intl, acts as the data center provider and operates the IP addresses, email servers, and the entire ecosystem of
  • Its email service feature maximizes the effectiveness of B2B email outreach campaigns. In other words, it ensures the protection of the sender's reputation and facilitates the delivery of emails to the primary inbox.

Follow-Ups Automation

  • You can enhance your email follow-up process using this software. This tool can schedule a series of emails (follow-ups) and send them automatically, one after another. 
  • However, the sequence will pause automatically if a specific conversion event is triggered, ensuring a more targeted and efficient approach. 
  • This feature allows you to scale up your email outreach while maintaining control and adapting based on recipient actions.

Overloop Vs. Vs. Smartlead – Is Smartlead the Best Choice?

Smartlead is an all-in-one cold emailing tool for multi-channel outreach. It comes with features such as unlimited mailboxes, warmups, and automated follow-ups that make cold emailing easier than ever. 

This tool also offers really powerful APIs and webhooks that make it super convenient to connect Smartlead with CRMs and other softwares.  

Overall, Smartlead is the best for streamlining your outbound efforts and increasing ROI within a couple of months. 

What is Smartlead Best for? 

Smartlead for Deliverability and Lead Gen Process

  • Smartlead offers unique IP servers for every campaign it sends out. 
  • This outreach tool offers unlimited warmups so your deliverability is optimum. 
  • Smartlead improves a high sender reputation with natural (human-like) AI conversations. It also protects your 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. 
  • Moreover, it offers Smart-Adjust, which defends your live campaigns against low reply rates. 
  • You can automate your lead generation process with Smartlead’s powerful cold emailing API infrastructure, which allows you to auto-create and manage campaigns. 

Smartlead for Cold Email Automation

  • Smartlead offers unlimited sender accounts for its users. You can create campaigns and auto-rotate mailboxes in one click. 
  • It lets you create omnichannel outreach comprising cold emails, follow-up emails, and LinkedIn interactions. Also, you can scale your outreach across WhatsApp, Twitter, etc. 
  • You can set up custom-conditional email sending triggers and create sub sequences based on lead behavior. 

Smartlead for LinkedIn Outreach 

  • Just like Smartlead’s cold emailing feature, you can send unlimited Connection Requests on LinkedIn by auto-rotating multiple LinkedIn profiles.
  • You can perform other activities such as visit profiles, send messages, and like recent posts. Besides, you can also reply to all your connections from the master inbox.

Smartlead for Sales Engagement Automation

  • Smartlead presents a master inbox to maintain and reply to all conversations from one dashboard. 
  • You can track email open rates, click-throughs, and reply rates so you can measure what works and implement necessary changes. 
  • SDRs can save hundreds of hours with Smartlead’s auto mailbox rotation. This tool also offers a full whitelabel experience.

So Which Tool Should You Choose –Overloop,, or Smartlead? 

Overloop,, and Smartlead—all the three platforms are popular SaaS tools in the industry. These are known for their excellent lead generation abilities, which is what marketing agencies and sales leaders look for. 

However, there are some striking differences on features, customer service, and pricing. 

So if you are still reluctant to pick the right tool for your business, let’s have a quick look at two major deciding factors – pricing and the customer reviews. 

Overloop Pricing

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

  • $99/user/month
  • Custom Pricing Pricing provides a free plan and has options for both monthly and annual billing. 

  • Startup Plan: The Startup plan is for only $8.25 per month and $99 per year. 
  • Professional Plan: The Professional plan is for only $16.58 per month and $199 per year.
  • Enterprise Plan: The Enterprise plan is for only $37.42 per month and $449 per year.

Smartlead Pricing

Smartlead offers four pricing plans for marketing agencies, sales teams, and lead generation agencies. You can start for free with its 14-day free trial (no credit card required and email warm ups included) and choose the right plan based on your needs. 

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

Additionally, as add-ons, you can avail 1 client at $29/month and 1 LinkedIn at $59/month. 

Smartlead offers a great money-traction for all kinds of businesses among all its competitors. And the pricing differentiation happens mostly on service level (e.g., custom CRM, webhooks, API access and integrations, active support, unlimited seats, etc.). 

What do Users Say About Overloop Vs. Vs. Smartlead? 

Overloop Reviews Reviews

Smartlead Reviews

The Final Analysis: Pros & Cons of Overloop,, and Smartlead



  • User friendly interface 
  • Good customer service
  • Great CRM
  • Seamless integration 


  • Doesn’t have phone outreach
  • Can’t export metrics
  • Pricey 


  • Good deliverability
  • Email server included
  • Easy email tracking
  • Unlimited Contacts


  • Expensive warming-up feature
  • Extra money for unlimited email campaigns



  • Offers unlimited sender account and unlimited warmups
  • Unique IP servers for campaigns
  • Custom CRM, webhooks & integrations, and API access
  • Omnichannel outreach across email and LinkedIn
  • End-to-end whitelabel experience – you can have the app under your domain
  • Auto-rotating email accounts to maximum email outreach 
  • Auto-categorization of lead intent and subsequences
  • You can track your campaigns’ performance – open rates, clicks, and reply rates 
  • Master inbox for managing all conversations in one place
  • Responsive support team and smooth onboarding


  • Smartlead won’t run on mobile devices/applications
  • There are webhooks and API access, but not any native integrations (HubSpot integration is coming soon) .


I have dissected Overloop,, and Smartlead, and hopefully, you now have a clearer picture of what each tool brings to the table. 

Overloop impresses with its high response rates and visually appealing email capabilities, while as a cold emailing tool. 

On the other hand, Smartlead stands out for its lead generation prowess and high deliverability rate. Ultimately, the best choice for you depends on your specific needs and preferences. 

So take a moment to weigh the pros and cons, consider your goals, and make an informed decision. 

Happy emailing!

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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