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10 Best Email Warm-Up Tools in 2024 (Features + Pricing)

16 min read
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As you delve deeper into the world of cold emailing, you become aware of the importance of email deliverability. Spending hours and hours on a campaign only to have your emails land up in the recipients’ spam inbox isn’t ideal for anyone. 

While researching ‘cold emailing best practices you have probably come across the concept of ‘inbox warm-up’ or ‘email warm-up’ as they call it. This concept is gaining popularity in the emailing industry as cold email service providers find hacks to work their way around the ‘spam filter’. 

Nearly 85% of all emails that are received are considered spam. Email Service Providers (ESPs) are well aware of these numbers and have taken measures to protect users from such occurrences by implementing a spam filter. 

A spam filter is a mechanism set in place to detect unwanted, virus-infected, and unsolicited emails from reaching a recipient’s primary inbox. The mechanism automatically detects such emails through various elements, such as spam triggering verbiage, too many images, high volume of emails, sender reputation, etc.

Email Warm-up Tools – Table of Contents

What is an email warm-up?

Email warm-up is the process of building and establishing the trust of Email Service Providers (ESPs) over time. Most ESPs have implemented strong spam detecting mechanisms to provide users with the best possible experience. 

Commonly referred to as ‘spam filters’, they look for any unusual content in your email. They filter out anything that looks suspicious and immediately labels it as spam. 

If a new domain starts sending out high volumes of emails, all of their sent emails will end up in the spam folder. 

Your domain is warmed up through the process of sending out system-generated emails (or manually sent out emails), which are then replied to (again through the system) to show engagement. This process helps ‘warm-up’ your domain and is fully automated. All emails appear legitimate enough to build the trust of ESPs. 

Most email warm-up tools these days use AI machine learning backed by a large network to stimulate business conversations to trick ESPs into thinking legitimate email activity is taking place. 

A proper email warm-up involves gradually increasing the volume of sent emails along with high engagement rates to show ESPs you are a legitimate and interesting sender that deserves to be in the primary inbox of the receiver. 

The email warm-up process generally takes about 3 to 4 weeks. It is not advisable to send mass emails from the get-go, as you could risk losing your account altogether. 

Pro Tip: To maximize email deliverability, continue warming up your domain during email campaigns too; this will positively impact on your overall campaign performance. 

Why is email warm-up important for your domain?

The primary goal behind warming up your inbox is to maximize the results generated through your cold email campaigns with optimized deliverability. Ultimately, a warmed-up inbox results in higher open, reply, and click rates. 

When your domain is warmed up, it increases your sender reputation making it easier for your emails to land in the recipient’s main inbox. 

These are some of the benefits of warming up your inbox: 

  1. Inbox placement is largely based on engagement, and warming up your inbox highlights your engagement rates. 
  2. By warming up your inbox, you are able to track your sender’s reputation and deliverability. 
  3. Once you launch your campaign, you will automatically see higher open rates because your warmed-up domain will increase your visibility. 
  4. As you undertake the process of email ramping up, your sender reputation increases as ESPs assess the credibility of your domain. 
  5. A warmed-up domain entails the highest possible deliverability leading to decreased bounce rates. All your emails will reach your target audience in their main inbox. 
  6. Email warm-ups are extremely effective because they use a smart algorithm, a network of high reputation inboxes, and meaningful warm-up email exchanges.
  7. It helps you increase and maintain maximum deliverability even during email campaigns.

Advanced features coupled with a strategic warm-up process are essential for a successful cold email campaign:

  • Personalization: Incorporating merge tags and spintax capabilities, Saleshandy enables you to create personalized email messages tailored to individual recipients. This personal touch captures attention and drives engagement, increasing the success of your cold emails.
  • Email Verification and Audience Quality: Utilizing Saleshandy’s email verification feature ensures that your campaign targets valid, responsive recipients. Quality control minimizes bounce rates and improves your sender reputation, setting the stage for better deliverability and engagement.
  • Automation and Sequencing: Saleshandy’s advanced automation features streamline your outreach efforts, including automated follow-ups and tracking. When integrated with a well-structured email sequence, these features ensure timely and relevant interactions with your prospects.
  • Deliverability Optimization: Implementing Saleshandy’s deliverability tools, such as email ramp-up and custom tracking domain, is crucial for ensuring your emails land in recipients’ primary inboxes. This enhances the visibility and effectiveness of your messages.
  • Sender Rotation: Saleshandy’s sender rotation capability allows you to distribute emails across multiple accounts. This not only enhances deliverability but also supports a gradual warm-up process, reducing the risk of triggering spam filters.
  • Unified Inbox for Response Management: Saleshandy’s Unified Inbox simplifies managing responses from prospects. This centralized dashboard aids in tracking conversations and ensures timely follow-ups, enhancing overall campaign efficiency.
  • Sequence Score for Optimization: The Sequence Score feature assesses various campaign elements, helping you rectify any issues before initiating outreach. This proactive approach optimizes your email copies, configuration, and setup, leading to better results.
  • Prospect Outcome and Warm-up Alignment: Saleshandy’s Prospect Outcome feature dovetails with warm-up efforts. By assigning stages based on responses, you can strategically warm up leads, focusing on those displaying higher interest for a more effective transition from cold to warm communication.

10 Best Email Warm-Up Tools 

Undertaking the process of manually warming up your email will consume a lot of time and resources. It is best to invest in an email warm-up tool that automates the entire process. Moreover, by using such tools you don’t have to hassle yourself with the technical side of warming up your inbox (which is often complicated). 

There are a wide variety of email warm-up tools available in the market today. But which tool aligns with your organization’s needs and fits within your budget?

Based on your goals and spending power, our team of experts has compiled a list of the top 10 best email warm-up tools that will help you avoid the spam folder forever!

  1. TrulyInbox
  2. Warmup Inbox
  3. Lemwarm by lemlist 
  4. QuickMail Auto Warmer
  5. Warmbox 
  6. Warmy.io
  7. Folderly 
  8. Mailwarm 
  9. InboxWarm by OutreachBin 
  10. Warm Up Your Email By Mailshake 

1. TrulyInbox


TrulyInbox is the most affordable Email Warm-Up tool that allows you to warm up your inbox in a few simple steps. With TrulyInbox, you can warm up multiple emails simultaneously hassle-free.

With TrulyInbox’s Email Warm-Up, you can improve your domain reputation gradually through a smart algorithm to achieve maximum deliverability in a short period of time. TrulyInbox gradually increases the number of emails sent out per day to have a positive impact on your domain rating. 


  • Connect Multiple Email Accounts
  • Fully automated set-up
  • Advance warm-up reports
  • Adjust sending volume with a single click
  • Sends highly personalized emails to avoid spam

Pricing :

  • Starter – $29 Per Month (Billed Annually)
  • Growth – $79 Per Month (Billed Annually)
  • Scale – $159 Per Month (Billed Annually)
  • Business – $239 Per Month (Billed Annually)

You may learn more about its pricing on its pricing page.

2. Warmup Inbox

Warmup Inbox

WarmUp Inbox is another standalone inbox warm-up tool that floods your inbox with ‘good’ emails. This tool creates and sends smart dynamic content for each and every email. They use a network of over 15,000 inboxes talking to each other to provide users with the most authentic experience. 


  • Outlook, Gmail, and SMTP integration 
  • Domain age tracking 
  • Blacklist monitoring 
  • Full sending control 
  • Inbox health scores 

Pricing Plans:

  • Basic – $15 Per Month
  • Pro – $49 Per Month
  • Expert – $299 Per Month

3. Lemwarm by Lemlist

Lemwarm by Lemlist

Lemwarm is a sub-product of lemlist that was solely created for the purpose of inbox warming up. Lemwarm uses a ‘best in class’ algorithm that makes use of real people resulting in better domain reputation and open rates. 

If you want to use lemwarm only, it costs around $29 per month, which is a little pricey just to warm-up your inbox and not be able to use their other features. The email warm-up is only available as a paid plan and is not included in the free trial version. 


  • Conversation threads
  • Control daily sending limits 
  • Detailed reports 

Pricing Plan:

  • Email Warm-Up – $29 Per Month

4. QuickMail Auto Warmer

Quickmail auto warmer

QuickMail offers an email warm-up tool called ‘Auto Warmer’. This tool is integrated with their main cold email automation platform. After you have linked your email account with Auto Warmer, your domain will automatically start sending and receiving emails to and from other users using the Auto Warmer tool. 

One of the reasons this tool stands out from the rest is because it is completely free to use. However, there are some limitations to the number of emails sent in a day and the number of inboxes you can connect. 


  • Connects to Gmail, Outlook, and other inboxes 
  • Specifically designed for cold emailers 
  • Deliverability reports 
  • Engagement with real people 

Pricing Plans:

  • Auto Warmer – Free 
  • Starter – $59 Per Month 
  • Pro – $79 Per Month 

5. Warmbox

Warmbox email warmup

Warmbox is an exclusive inbox warm-up tool that uses a smart AI algorithm to generate realistic responses through its network of 10,000 inboxes. 

Warmbox charger $19 per month for 1 inbox warm-up and 50 emails per day; which is quite costly as compared to the other tools listed in this blog. They also do not offer any free trial. 


  • Compatible with most ESPs
  • Detailed analytics 
  • AI-based platform 
  • Domain blacklist and DNS deliverability checker

Pricing Plans:

  • Solo – $19 Per Month 
  • Start-up – $79 Per Month  
  • Growth – $159 Per Month  
  • Team – Consultation required

6. Warmy.io

Warmy.io is an innovative email warm-up tool designed to enhance your email deliverability rates. Using a combination of AI-driven algorithms and human-like interactions, Warmy.io ensures that your emails comes across as legitimate by various ESPs (Email Service Proiders).

This tool offers a seamless integration with popular email platforms such as Gmail, Outlook, and SMTP, allowing for a seamless setup. Warmy.io’s unique approach to warming up your inbox involves engaging with real users within its network, creating a more authentic experience.


  • Realistic interactions with actual users
  • Customizable warm-up schedules
  • Detailed analytics and reporting
  • Integration with popular ESPs
  • Spam score monitoring and adjustments
  • Easy-to-use dashboard for tracking progress

Pricing Plans:

  • Starter – $49 Per Month Per Mailbox
  • Business – $129 Per Month Per Mailbox
  • Premium – $189 Per Month Per Mailbox
  • Expert – $279 Per Month Per Mailbox
  • Enterprise – Custom pricing available upon consultation

Warmy.io’s pricing structure is designed to cater to various needs, from individual users to large-scale businesses. Warmy.io stands as a robust solution for anyone looking to improve their email deliverability and domain reputation.

7. Folderly

Email warmup by Folderly

Folderly is an AI-based platform that increases your email deliverability. They offer an all-in-one email deliverability platform that allows you to maximize your email deliverability for any ESP. Their AI-powered machine learning mimics human-to-human conversations to successfully warm up your inbox or resolve any spam-related issues. 

Folderly is another expensive tool on this list, their basic warm-up plan starts at $49 per month. 


  • Integrates with the most popular ESPs 
  • Deliverability tests 
  • Spam checker tool 
  • Email deliverability audit 

Pricing Plans:

  • Basic warm-up – $49 Per Month
  • Cold email outreach – $200 Per Month
  • Email marketing – Consultation required 

8. Mailwarm

Email warm up by Mailwarm

Mailwarm is a marketing software that ensures your emails reach your recipients’ inboxes. This tool makes your domain active by gradually increasing its sending and response rates to build a positive sender reputation.

The Mailwarm team uses a network of 1000+ email accounts that interact with your domain in accordance with the schedule you set. 

Out of all the inbox warm-up tools listed in this blog, this is by far the most expensive one; the starter pack is $69 (for one inbox only). 


  • Create your own unique reply and send schedules
  • Integrates with Gmail, Outlook, SMTP, and other popular ESPs
  • Easy setup 
  • Daily insights 

Pricing Plans:

  • Starter – $79 Per Month (1 Inbox) 
  • Growth – $189 Per Month (3 Inboxes)
  • Scale – $549 Per Month (10 Inboxes) 

9. InboxWarm by OutreachBin

Inbox warm up by outreachbin

InboxWarm is a byproduct of OutreachBin and exclusively functions as an email warm-up tool. Their algorithm operates on a peer-to-peer network, which means your domain exchanges warm-up emails with individuals (that are actual businesses) who are also warming up their inboxes. When you use this tool to warm up your inbox, you automatically become a part of this network. 


  • Interactions with real businesses 
  • Connects with Gmail, Outlook, SMTP, and other popular inboxes
  • Auto remove from spam 
  • Warm-up metrics 

Pricing Plans:

  • $39.99 Per Month (Cold emailing services included) 
  • No free trial is available 

10. Warm Up Your Email By Mailshake

Mailshake email warm up

Warm Up Your Email is a tool that was acquired by Mailshake in 2021. What sets this tool apart from the rest is the fact that they use their actual team members to generate engagement for your emails. They also provide a free tool to review your DMARC, SPF, and SMTP configuration. 


  • Real people reply, open, and read your emails 
  • Spam score and pattern monitoring 
  • Both human and computer warming are combined 
  • Connects with Gmail, Outlook, SMTP, and other popular inboxes

Pricing Plans:

  • Sole Sender – $29 Per Month 
  • Pro Sender – $49 Per Month 
  • Agency Sender – $99 Per Month 

Wrapping up

It is impossible to start sending bulk emails from a new email account, adversely affecting your deliverability and sender reputation. It is, therefore, essential to warm up your Inbox. Above mentioned tools are the best solution if your company works at scale and values time.

Frequently Asked Questions (FAQs)

1. Can I warm up my email manually?

Yes, you can. It is absolutely possible to warm up your email manually, but it is a time-consuming process that requires a lot of effort. You will have to send out emails daily and ensure that you are getting engagement. One of the key factors in gaining a solid domain reputation is a high response rate. This entire process will take you months (provided you are consistent in your efforts) to get ESPs to deem you as a trustworthy sender. 

2. When should I warm up my email?

It is recommended that if you are sending out high volumes of emails from a new email account, then you should warm up your inbox to avoid the spam folder. The warm-up process should be continued even when the email campaign is running to achieve maximum deliverability. 

3. How long does it take to warm up an inbox? 

It takes roughly 3 to 4 weeks to properly warm up your inbox. However, as mentioned previously, even after you have warmed up your inbox and launched your campaign; keep the warm-up process ongoing to continually increase your sender reputation. Warming up only before sending does not immunize your domain from spam filters. 

4. Can I start my email campaign without warming up my inbox? 

Yes, you can but ideally, you shouldn’t. If you do, your emails will most likely land in the recipient’s spam folder which will harm your sender reputation and could ultimately lead to your account being blacklisted.

5. Will I have better email deliverability if I warm up my inbox? 

Yes, 100%! Without warming up your inbox, ESPs will most likely consider your new domain as spam. When you warm up your inbox with the best practices in mind, you will achieve boosted email deliverability and avoid triggering spam filters altogether. When ESPs see that your email account has a very high engagement rate, they will automatically deem you as a trustworthy sender. 

If you continually warm up your inbox, you will also be able to maintain that deliverability. This is why it is recommended, that you keep warming up your inbox even when your campaigns are up and running. 

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