Smartlead Vs.Folderly Vs. Overloop: Best Tool for Email Deliverability

Created On:
May 3, 2024
Updated On:
May 3, 2024
Smartlead Vs.Folderly Vs. Overloop Tool Comparison

In email marketing, deliverability is the cornerstone of success. If your emails don't reach the inbox, your content, no matter how good, can't convert. 

With numerous solutions claiming to optimize email deliverability, it can be a tough call to choose the best one. 

We understand the challenges and confusion that can come with choosing the right platform for your business growth. Review sites can sometimes be deceiving, which is why we're here to provide you with an in-depth comparison of these three tools.

In this article, we'll dive into a comparative analysis of three prominent tools: Smartlead, Folderly, and Overloop, helping you decide which is best for your email deliverability needs.

We’ll look deep 

  • Into the features
  • Best use case
  • Customer reviews

Understanding the importance of landing in your recipient's inbox is critical, and with the right tools, you can significantly improve your email marketing campaigns. Let's take a closer look at these three tools to help you make an informed decision.

Email Deliverability: The Make-or-Break of Email Marketing

Before we compare the tools, it's crucial to understand why email deliverability is such a vital aspect of your email marketing strategy. 

Email deliverability refers to the ability of your emails to land in the recipient's inbox rather than getting sidetracked into spam folders or, even worse, being blocked by email service providers (ESPs).

A good email deliverability rate ensures that your messages are seen by your audience, which in turn increases the chances of engagement and conversion. 

Factors that affect deliverability include 

  • Sender reputation
  • Email content
  • Subscriber engagement, and
  • The technical setup of your email infrastructure.

Overview of  Smartlead Vs. Folderly Vs. Overloop

Smartlead: A Closer Look

Smartlead Homepage

Smartlead is more than just a sales engagement tool; it's a powerhouse for email deliverability, lead generation, cold email automation, and LinkedIn outreach. Our platform is designed to optimize deliverability with unique IP servers and unlimited warmups. 

With Smartlead, you can enhance your sender reputation through natural AI conversations, ensuring your emails land in the primary inbox instead of spam folders. We offer a cold emailing API infrastructure for seamless integration into your existing workflows.

Custom-conditional email triggers and sub-sequences based on lead behavior allow you to personalize your outreach for maximum impact. Smartlead also provides a centralized master inbox, email tracking, and time-saving features like mailbox rotation and full whitelabel capabilities. 

With Smartlead, you have everything you need to supercharge your email marketing efforts and drive better results.

Key Features for Email Deliverability Offered By Smartlead

Unlimited Auto-Rotating Email Accounts

Forget about daily limits or email reputation concerns. Smartlead allows you to create campaigns and connect mailboxes in just one step.

With the click of a button, you can auto-rotate messages and effortlessly convert leads into revenue, all within a user-friendly platform. 

Serdar T., Founder of FunnelVision, describes Smartlead as the most user-friendly cold email tool he's ever used, highlighting its easy setup, bulk upload feature, and impeccable customer support.

Land in Your Lead's Inbox with AI Warmups

Smartlead helps you build and defend your mailbox sending reputation by leveraging 110k diverse mailboxes across various providers like Outlook, Google, and Zoho. Improve your delivery reputation with natural content and humanized sending patterns.

The platform's spam rescue feature automatically protects your mailbox reputation, while unique identifiers cloak all warm-up emails from being recognized by automation parsers.

Build Revenue with High-Delivery IPs

Smartlead's IP rotating infrastructure ensures unique and exclusive IP allocation for every campaign. Only Deliverability Test approved IPs are used, and dynamic IP allocation ensures pre-warmed up IPs or fresh IPs for each campaign.

Romain Osman, Co-Founder of Five Element, credits Smartlead with helping achieve a remarkable 2.48% conversion rate and expanding their client base, rating it a perfect 10 out of 10 for satisfaction.

Beating the Competition with ESP Matching

Increase your deliverability by 16% with Email Service Provider matching. Smartlead's dynamic ESP matching algorithm improves deliverability by automatically matching your lead's mailbox provider with yours, eliminating the need for manual MX record matching. 

Matthew Lucero, Founder of Anevo Marketing, praises Smartlead as the most reliable cold email tool he's ever used, emphasizing its super responsive team and quick implementation of changes.

Optimize Campaign Performance with AI Learning

Smartlead's AI learning capabilities auto-adjust warm-up reply rates and patterns to offset low reply rates and improve deliverability. The platform intelligently adjusts sending patterns to emulate healthy email behavior, ensuring your campaigns remain effective. AI learns campaign performance in real-time, allowing for adjustments to sending patterns on the fly.

Sending Natural-Looking Emails

Send emails that naturally fit into your lead's inbox using optimized email delivery. Boost your reply rates by 18%-22% with plain text emails, skipping past spam filters without any extra work. Maintain your email formatting without sacrificing deliverability, ensuring your emails stand out and engage your audience effectively.

Smartlead now offers the latest GPT-4 update, bringing three key sections to enhance your email outreach:

  1. Master Inbox Reply: Leverage AI to effortlessly manage your inbox, saving time and improving efficiency.
  2. Mail Sequence Compose AI: Simplify your email composition process with advanced AI assistance, ensuring your emails are effective and engaging.
  3. Campaign Settings GPT-4 Categorization: Customize your campaigns using your own GPT-4 prompts for targeted and impactful outreach.
Smartlead Master Inbox

Additionally, Smartlead introduces Pick Templates, a feature that allows you to access community-generated templates based on ChatGPT prompts. 

You can also create and share your own templates, choosing whether to make them public or private. This feature aims to foster a community of sharing and innovation among our users, enhancing your email marketing strategies.

Smartlead now also offers exclusive feature enhancements for cold email campaigns, including 

  • User Level Webhook, 
  • Client Level Webhook, 
  • Campaign Level Webhook
  • Untracked Replies Webhook for Clients

These enhancements provide you with more control and flexibility in tracking and managing your campaigns, ensuring a more efficient and effective cold email experience.

What Folderly Brings to the Table?

Folderly Homepage

Folderly is a comprehensive email deliverability platform. This all-in-one solution is dedicated to enhancing mailbox health, boosting your inbox rate, analyzing email content, and optimizing email infrastructure. Additionally, Folderly enables you to conduct domain health checkups. It seamlessly integrates with leading email service providers (ESPs) and accommodates custom integrations.

Key Features and Benefits of Folderly

Folderly's Email Deliverability and Integrations

Folderly ensures 100% email deliverability with advanced algorithms that enhance sender scores. It maintains positive interactions with your emails and offers a comprehensive spam trigger checker. The automated warm-up maintenance feature helps maintain high email deliverability, increasing email open and reply rates for your campaigns.

Ease of Use & Data Safety

Connecting your mailbox with any email service provider is easy with Folderly's one-click setup. The user interface is easy to navigate, and with the support of a customer success manager, setup is a breeze. Folderly offers GDPR and CCPA-enabled solutions for comprehensive data protection.

Spam Checking and SPF Generation

Folderly checks spam-trigger words from email templates to reduce the risk of being flagged as spam by ESPs. It also performs SPF (Sender Privacy Framework) checks and generates SPF records for your domain.

Overloop: Streamlining Your Sales Process

Overloop Homepage

Overloop is a comprehensive sales automation platform that specializes in cold email and LinkedIn automation. The Overloop Inbox conveniently manages all outreach conversations in one place, offering 'dynamic smart segments' to organize email list contacts. Besides sending personalized cold emails at scale, Overloop seamlessly integrates with LinkedIn Sales Navigator for contact creation. Additionally, it facilitates lead generation, nurturing, and audience targeting, all within a single platform.

Key Features and Benefits of Overloop

List Building and Contact Management

Overloop includes an email finder to locate missing email addresses of your contacts. It provides a Chrome extension for contact extraction from any source. Contacts can be imported directly from LinkedIn, working with both LinkedIn Basic and LinkedIn Sales Navigator. 

Moreover, contacts from spreadsheets/CSV files from CRMs like HubSpot, Salesforce, and Pipedrive can also be imported. Using dynamic smart segments, contacts lists can be organized and managed, allowing for personalized contact lists with custom fields.

Outbound Outreach

With Overloop, you can create omnichannel outreach by combining follow-up emails, LinkedIn actions, and manual actions (such as calling). Its LinkedIn automation feature enables profile visits, connection requests, and direct messages at scale. 

You can connect your email address and send cold emails with {{variables}} to personalize your outreach. Overloop offers comprehensive email tracking, including open rates, visits, reply rates, bounces, and more. It also allows tracking of automatic replies or out-of-office replies. 

Additionally, you can send emails as replies to previous emails (within the same thread) to maintain context.

Sales Engagement

Automate manual tasks with Overloop to accelerate the sales process. It offers a fully customizable sales pipeline for tracking deals. The Conversation Inbox manages all outbound conversations with prospects and leads in one dashboard. 

Conversations can be assigned among team members, facilitating easy collaboration. Overloop provides native integrations with Google (Gmail and Google Workspace), Outlook, Salesforce, HubSpot, Calendly, Slack, and more.

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

Smartlead Homepage

Smartlead is a comprehensive cold emailing tool for omnichannel outreach. With its unlimited mailboxes and automated email warmups, this sales engagement tool ensures your emails always land in your prospects’ inboxes. 

Let's delve deeper into Smartlead's key features and advantages over the other tools:

Smartlead for Deliverability and Lead Gen Process

  • Smartlead offers unique IP servers for every campaign, ensuring high deliverability.
  • It provides unlimited warmups to maintain optimum deliverability.
  • Smartlead enhances sender reputation with natural AI conversations and protects it by moving emails from spam folders to the primary inbox.
  • The tool uses unique identifiers to cloak warmup emails from automation parsers.
  • Smart-Adjust defends live campaigns against low reply rates.

Smartlead for Cold Email Automation

  • It offers unlimited sender accounts and easy campaign creation with auto-rotating mailboxes.
  • Smartlead enables omnichannel outreach, including cold emails, follow-ups, and LinkedIn interactions, and can scale outreach across various platforms.
  • Custom-conditional email triggers and sub-sequences based on lead behavior can be set up.

Smartlead for LinkedIn Outreach

  • Similar to its cold emailing feature, Smartlead allows for unlimited Connection Requests on LinkedIn and other activities like profile visits, sending messages, and liking posts.
  • It offers a master inbox to manage LinkedIn conversations.

Smartlead for Sales Engagement Automation

  • The tool provides a master inbox to maintain and reply to all conversations.
  • Email open rates, click-throughs, and reply rates can be tracked for performance measurement.
  • SDRs can save time with auto mailbox rotation, and the tool offers a full whitelabel experience.

In comparison, Folderly focuses on email deliverability and contact management, while Overloop specializes in sales automation and outreach. Smartlead's comprehensive features, including its focus on deliverability, omnichannel outreach, and LinkedIn automation, make it a standout choice for users seeking a robust cold email outreach solution.

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

If you're still on the fence about which tool to choose, let's take a closer look at two critical factors: pricing and customer reviews.

Smartlead Pricing

Smartlead offers tiered plans catering to different team sizes and needs:

Essentials: $34/month

  • 2,000 active leads
  • 6,000 emails per month

Pro: $66/month

  • 10,000 active leads
  • 40,000 emails per month

Business: $79/month

  • Increased limits on leads and emails
  • Custom CRM integration

Custom: For agencies and large teams

  • Contact Smartlead for details
  • Supports up to 2 million leads

All plans come with a 14-day free trial.

Folderly Pricing

  • Individual: $96 per mailbox per month
  • Team (10-24 mailboxes): $72 per mailbox per month
  • Team (25-99 mailboxes): $56 per mailbox per month
  • Enterprise (100+ mailboxes): Contact Folderly for a custom quote

Overloop Pricing

Startup: $58 per user per month

  • Access to all features
  • Max. 3 running campaigns
  • 100 Email Finder credits per user per month

Growth: $82 per user per month

  • Everything in the Startup plan, plus:
  • Max. 25 running campaigns
  • 250 Email Finder credits per user per month
  • Professional services & support

Enterprise: $125 per user per month

  • Everything in the Growth plan, plus:
  • Unlimited campaigns
  • 500 Email Finder credits per user per month

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

Smartlead Reviews

Customers rave about Smartlead's email deliverability and omnichannel outreach capabilities. The platform's customization options and user-friendly interface are also commended in reviews.

Smartlead G2 review
Smartlead G2 review

Folderly Reviews

Customers appreciate Folderly's focus on email deliverability and contact management. The platform's ease of use and customer support are also highlighted in reviews.

Folderly G2 review
Folderly G2 review

Overloop Reviews

Users praise Overloop for its sales automation features and seamless integration with other tools. The platform's ability to streamline outreach and track email performance is also well-received.

Final Analysis: Which Tool You Should Choose?

When it comes to ensuring your emails reach your audience's inboxes, Smartlead offers a thoughtful and effective approach. Smartlead's focus on email deliverability is not just about technical solutions; it's about fostering genuine connections through your emails.

Smartlead's unique IP servers for each campaign and unlimited warmups are designed to establish trust and credibility with recipients. By ensuring that your emails are delivered smoothly, Smartlead sets the stage for meaningful engagement.
Moreover, Smartlead's emphasis on natural AI conversations and humanized sending patterns adds a personal touch to your emails. This approach not only improves deliverability but also enhances the overall recipient experience.

Folderly excels in providing a user-friendly interface and comprehensive spam trigger checking. Its ability to integrate with major CRMs, ESPs, and marketing automation tools makes it a convenient choice for businesses seeking to streamline their email deliverability efforts. 

Additionally, Folderly's emphasis on data safety and GDPR/CCPA compliance makes it a reliable option for businesses prioritizing data protection.

Overloop shines in its ability to automate manual tasks and offer advanced tracking features. With features like dynamic smart segments for organizing contact lists and omnichannel outreach capabilities, 

Overloop is ideal for businesses looking to optimize their email outreach efforts. Its integration with LinkedIn Sales Navigator and other tools further enhances its appeal for sales and marketing teams.

However, Smartlead's strengths extend beyond deliverability. Features like auto-rotating email accounts and custom-conditional email triggers enable you to create personalized campaigns that resonate with your audience, ultimately driving better results.
In a nutshell, Smartlead offers a balanced approach to email deliverability, combining technical expertise with a focus on human connection. It's a tool that not only ensures your emails are delivered but also helps you build meaningful relationships with your audience.


In this article, we've conducted a thorough analysis of Folderly, Overloop, and Smartlead, comparing their features, use cases, pricing, and customer feedback. We've highlighted the best features and pros and cons of each platform to help you make an informed decision.

If you're looking to scale your business and optimize your outreach efforts, Smartlead emerges as a strong recommendation. With Smartlead, you can significantly increase your chances of meeting bookings and achieving your business goals.

Smartlead offers a 14-day free trial with no credit card required, allowing you to explore the platform and determine if it meets your needs. With Smartlead, you only pay for the features you need, making it a cost-effective solution for growing businesses.

What’s a Rich Text element?

The rich text element allows you to create and format headings, paragraphs, blockquotes, images, and video all in one place instead of having to add and format them individually. Just double-click and easily create content.

  • dfbvrsg
  • svsv

Static and dynamic content editing

A rich text element can be used with static or dynamic content. For static content, just drop it into any page and begin editing. For dynamic content, add a rich text field to any collection and then connect a rich text element to that field in the settings panel. Voila!

How to customize formatting for each rich text

Headings, paragraphs, blockquotes, figures, images, and figure captions can all be styled after a class is added to the rich text element using the "When inside of" nested selector system.

Author’s Details


Rajashree specializes in strategizing and planning B2B SaaS product marketing content. As a writer turned researcher, she has a deep-rooted affinity for writing data-driven content. With over 8 years of experience in the industry, Rajashree has documented her insights in a series of blogs covering genres such as SEO, Content Marketing, Lead Generation, and Email Marketing.


Edited by:


People will also read

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.

Powerful Automated Email Marketing that Drives Sales.

  • All Features Included
  • No Credit Card Required
  • Free Warmup Included