My Honest Review of 13 Best Email Warmup Tools for Cold Outreach

Email warmup tools can be the difference between a 20% and 80% inbox placement rate.

But this only works if you choose the right tool for email deliverability.

Pick the wrong tool, and you will not just stay at 20%. You will drop below it and damage your sender reputation in the process.

I have been running cold email campaigns for over 10 years. I have seen this problem crush results for lead generation experts, SDRs, and sales teams alike.

So I did the research for you.

I tested the top email warmup tools on the market. I ran hands-on warmups for multiple weeks across different email scenarios and tracked deliverability metrics at every stage.

The result? A shortlist of the most reliable tools that actually protect your domain and land your emails in the inbox.

Here’s everything you need to know before choosing one.

Email Warm-Up Tools Put to the Test: Here’s What I Found

No fluff, just real results!

I put 13 popular email warm-up tools to the test over 3 weeks, sending 50 emails each week with every tool – why?

• So you don’t have to waste time and money testing them all
• To see which ones actually improve deliverability

🥁 Results Declared 🥁

My In-Depth Review of the 13 Best Email WarmUp Tools

I’ve already shared my results with these tools; now, I’ll walk you through my experience with each one so you know exactly what to expect.  

1. TrulyInbox
2. Lemwarm
3. Warmy.io
4. Mailivery
5. Mailreach
6. WarmUp Inbox
7. Folderly
8. Allegrow
9. Mailwarm
10. InboxAlly
11. Warmbox
12. Auto Warmer by QuickMail
13. MailToaster

Let’s get into the details!

1. TrulyInbox 

TrulyInbox takes the top spot because it solves the warmup problem without overcomplicating it.

AI-powered conversations with high-reputation accounts build your sender credibility naturally. This helps you to get an inbox placement rate as high as 98%.

The platform supports unlimited email accounts across all major providers and lets you customize every aspect of your warmup strategy.

You can connect unlimited inboxes, customize your warmup intensity, and monitor inbox placement in real-time.

At roughly $6.60 per inbox monthly, it’s the most cost-effective solution I tested.

The setup is done in two minutes, and you’re warming up.

Pricing (Billed Annually):

• Starter: $22/month 
• Growth: $59/month
• Scale: $142/month
• Business: $217/month

What do Users Have to Say?

“TrulyInbox really helps when it helps with email management. I love its simple and user-friendly design, it helps me to focus on what matters. Replies are humane, it makes the communication and connection much much better and efficient.”  Read the full review on G2 

Read our Trulyinbox review.

2. Lemwarm

Lemwarm is one of the best email warm-up and deliverability tools in the market that uses a warm-up network of 20K+ healthy domains.

My Favorite Feature 😃: Email Deliverability Test

It helps you send a test email from your email account to a list of test inboxes that Lemwarm provides to see where your emails are landing in the primary, spam, or promotional folder. 

You also get a deliverability report showing your inbox placement rate across different email providers (like Gmail, Outlook, Yahoo, etc.).

What do Users Have to Say?

“The best thing is their Lemwarm feature for warm-up activity.”  Read the full review on G2

Pricing (Billed Annually):

• Essential Plan: $24/month
• Smart Plan: $40/month
• Custom plans based on your needs

3. Warmy.io

Warmy is an AI-driven email warm-up tool.  

To provide the best email warm-up service, it offers automated warm-up with the help of “Adeline,” the AI engine.

My Favorite Feature 😃: Template WarmUp 

For me, the standout feature of Warmy.io has to be the ability to add your template to the warm-up process.

By using this feature, you can make the email template part of the warm-up process and improve the deliverability of a single email template. 

Moreover, I really liked their deliverability insight capabilities as they helped me to make smarter decisions to optimize my outreach strategy.

What do Users Have to Say? 

“Warmy is a reliable tool that delivers on its promises. It helps improve your email deliverability, which is crucial for successful email marketing. I send emails every day with it, and I’m getting good results. They have a free trial, too, which is how I got started.” Read the full G2 review

Pricing (Billed Annually):

• Custom Pricing

4. Mailivery

Another tool that provides the best email warm-up services is Mailivery.

It uses a solid AI algorithm to remove your emails from spam and positively replies to them to improve your deliverability in real time. 

My Favourite Feature 😃: Customizable Intelligent Sending Behavior

You can customize the volume and timing of your email warm-ups so that you can set the right limits as per your strategy to ensure maximum deliverability.

That said, it also offers advanced settings like you can, set time zones, weekend sending, custom signatures, unique email identifiers, etc.

What do Users Have to Say?

“Mailivery’s email warm-up tool leverages AI and real conversations to enhance sender reputation and beat SPAM algorithms.” Read the full review on G2

Pricing (Billed Annually):

• Starters: $21.75/month
• Professionals: $59.25/month
• Business: $149/month

5. MailReach

MailReach is an email warmup tool built to optimize inbox placement.

It has a smart and complex warming algorithm that works behind the scenes to improve the deliverability of your email accounts.

My Favorite Feature 😃: AI Deliverability Assistant

Its AI assistant identifies issues like:

• SPF, DKIM, and DMARC email setup
• Analyze your inbox placement
• Detects reputation issues

The assistant suggests fixes based on the issues it finds and gives recommendations to improve deliverability, like adjusting sending volume, warming up your domain, or tweaking email content.

This was super helpful as it allowed me to detect roadblocks ahead of time and optimize accordingly.

What do Users Have to Say?

“MailReach automates the process of sending emails to your receiver, and the learning curve is minimal. You just need to sign up, choose a plan, connect your email address, and start with warm-up emails to test the best strategy to reach your targets.”- Read the full review on G2

Also Read: Top MailReach Alternatives

Pricing (Billed Annually):

• All-in-One Email Warmer: $20 per month
• Custom plans you can check the pricing page

6. WarmUp Inbox

WarmUp Inbox is the next email warm-up tool I tried.

It uses a network of over 30,000 real inboxes to warm up your emails (which is quite impressive)

My Favorite Feature 😃: ESP Warmup Tool

But what really impressed me was their ESP Warmup feature. 

I used it to warm up my Gmail accounts, and I saw a clear improvement in deliverability. Before using it, a lot of my emails sent from those accounts were ending up in spam. 

However, after the warm-up, more of them started landing in inboxes. 

It works by boosting engagement and building trust with ESPs over time—something that’s hard to get right on your own.

What do Users Have to Say?

“Cleared up all deliverability mysteries. I finally get it! Plus, it made the technical aspect of doing it all so easy to implement. Makes a big difference.” Read the full review on G2

Pricing (Billed Annually):

• Basic: $15/month
• Pro: $49/month
• Max: $79/month

7. Folderly

Folderly is an advanced email warm-up tool.

With it, you can easily track and improve your warm-up email efforts.

My Favorite Feature 😃: Monitoring Feature

 The real value is in its ability to find and fix deliverability problems, which makes sure that your emails always get to the right people.

But Folderly is charging $96/mailbox/mo (when billed annually), which I think is too much for just warming up an email account! 

There are many other tools in the market that offer much more than just email warm-ups, like outreach features, at the same price tag! So, I think you better invest in an outreach tool that offers much more than just email warm-up.

What do Users Have to Say? 

“I like how Folderly makes email deliverability easy to manage. The tool gives clear insights and actionable tips, helping to keep emails out of spam folders. The interface is intuitive, so setting up and monitoring campaigns is quick and straightforward.” Read the full review on G2

Also Read: Best 11 Folderly Alternatives

Pricing (Billed Annually):

• Starter: $39/month
• Growth: $159/month
• Pro: $399/month
• Agency: $1,199/month

8. Allegrow

Another email deliverability software that I tested was Allegrow. 

I really liked their testing feature. Almost all the warm-up tools in my list have this feature, but Allegrow’s deliverability feature differs by process. 

It sends test emails to B2B inboxes that have unique postmasters and gives the accurate percentage of your emails landing in spam folders vs. the primary inbox.

My Favorite Feature 😃: Safety Net

This feature helps to automatically pause the emails that will hurt your company’s sender reputation.

What do Users Have to Say?

“Allegrow has been very easy to use, integrating more users as the team grows. Prevents at-risk emails and has really done an excellent job at improving our email deliverability.” Read the full review on G2

Pricing:

• Starter: $99/month
• Scale Plus Unlimited: $1,1340/month
• Custom pricing

9. Mailwarm

Mailwarm is a basic email warm-up tool. 

It has 1000+ real inboxes that interact with your email accounts by opening them, taking them out of the spam folder, marking them as important, and giving a reply. 

These great interactions make your sender’s reputation stronger.

My Favorite Feature 😃: Dashboard Monitoring 

You can easily track and control your warm-up efforts from a single dashboard. It gives you insights into your daily activities so that you can either scale the email sending volume or pause when needed.

What do Users Have to Say? 

“It warms up our inboxes in 2 weeks and helps us deliver outbound to our target prospects. Without it, our emails would not have been properly delivered, and our domain would have been hurt.” Read the full review on G2

Pricing (Billed Annually):

• Starter: $69/month
• Growth: $159/month
• Scale: $479/month

10. InboxAlly

InboxAlly is an email warm-up tool that has advanced engagement features. 

Other warm-up tools have basic engagement features where they reply and move emails from spam.

 But InboxAlly has an advanced engagement feature like “Click Link” where the links present in the warm-up emails are automatically opened. 

This action demonstrates not only interest in the content but also builds trust among ESPs.

My Favorite Feature 😃: Auto-Scrolling Action

It automatically scrolls down on your longer warm-up emails, which sends high-value engagement signals to ESPs.

What do Users Have to Say?

“With the help of this tool, I have been able to increase the deliverability of emails on any IP or domain on any platform with huge success.” Read the full review on G2

Pricing:

• Starter: $149/month
• Plus: $645/month
• Premium: $1,190/month
• Enterprise: Custom pricing

11. Warmbox

Warmbox allows you to warm up email accounts from 10+ ESPs. 

It allows you to improve your email deliverability with a network of 35,000 inboxes with GPT-4 generated warm-up emails. 

My Favourite Feature 😃: Customizable warm-up options

You can customize the email volume, sender reputation, reply rate, and targeted audience for your warm-up campaign. 

What do Customers Have to Say?

No reviews on G2

Pricing (Billed Annually):

• Solo: $15/month
• Starter: $69/month
• Growth: $139/month
• Team: Custom pricing

12. Auto Warmer by QuickMail

Auto Warmer by QuickMail is an automatic email warmer that handles everything for you. It integrates with Mailflow to provide you with end-to-end email warm-up functionalities.

Once you connect your email account, it automatically sends and receives emails from Mailflow users.

The automation builds your sender reputation naturally while you focus on actual outreach. You set how many emails you want per day, and Mailflow handles the rest.

I connected my email accounts, and the automation started immediately. The system just worked in the background.

The automatic engagement from real Mailflow users felt authentic. Emails were opened, replied to, and flagged as important naturally. 

My Favorite Feature 😃: Automatic Tracking

The automatic tracking was excellent.

I could see in real-time where emails were landing across different providers. The system automatically showed me if messages hit spam, so I could address issues before launching campaigns.

No reviews on G2

Pricing (Billed Annually):

• Freemium
• Silver Pool: $49/month
• Gold Pool: $99/month

13. MailToaster

MailToaster is built by people who actually know email deliverability. 

The platform uses a real email account network to warm up your emails naturally. It helps to create a genuine sender reputation instead of relying on AI-generated fluff.

Your actual email templates get warmed up, not fake ones. That matters because authenticity is what email providers look for.

My Favorite Feature 😃: Email Templates

MailToaster felt different from the moment I set it up.

The onboarding is genuinely simple, as it makes it easy to connect with ESP (Gmail, Outlook, or Yahoo ) in a few minutes.

The ability to warm up email templates impressed me most. Instead of generic AI-written emails, MailToaster used my actual templates and signatures. 

This authenticity matters because email providers can detect artificial warmup content. 

The multiple profiles feature is useful.

I could create separate profiles for different sending strategies. One profile for aggressive ramping, another for steady maintenance. Each account uses different approaches for proper outreach strategy execution.

No reviews on G2

Pricing (Billed Annually):

• Email Warm-up Plan: $26/month

Final Verdict!

Well, it’s just email warm-up. 

(It is very important, but it should not take much of your time and effort)

It should run on AUTOPILOT.

If you are still reading this and are not sure which email warm-up tool to opt for, I suggest you go for TrulyInbox.

Why? Because it is good at its job (i.e., warming up emails) and is natively integrated with Saleshandy.

All you have to do is – connect your email account with TrulyInbox in Saleshandy and forget about it. 

FAQs on Email Warm-Up Tools

1. What Is the best email warmup tool?

Based on my research and testing of various email warm-up products, I can say that TrulyInbox is one of the best email warm-up tools. Here’s why:

• It re-creates human behavior like opening, replying, marking as important, starring, etc.
• The email accounts used for sending warm-up emails are from a verified network of real users who have opted in.
• You can easily add email accounts from Google and Microsoft using oAuth and other providers using SMTP settings.
• Finally, it integrates seamlessly with Saleshandy–an AI-assisted cold email automation platform. So you can warm up your emails and immediately start reaching out to prospects.

2. How do you warm up emails?

There are 2 ways to warm up your email accounts: The manual, time and effort-consuming way and the more efficient option—using an email warm-up tool. 

3. How to warm up an email for free?

The only way you can warm up your email accounts for free is by doing it yourself. And let me tell you, the manual route is very time and effort-consuming. Your best bet is to rely on email warm-up tools like TrulyInbox, Lemwarm, etc.

4. Is email warmup legal?

Of course, it is legal! And the best way to make sure it stays that way is to warm up using an email warm-up platform.
These tools operate within a network of verified users who have consented to receive and engage with warmup emails.
This way, the entire warm-up process remains compliant with privacy laws like GDPR, CAN-SPAM, etc.

5. Which email warm-up platform is best for B2B campaigns?

It depends on your requirements and factors. Factors like

• The number of email accounts
• The daily sending limit
• The number of integrations
• Monthly budget

If you want an affordable and reliable warm-up tool, TrulyInbox is a good choice. The rest are Lemwarm, WarmUp Inbox, and more. 

6.  What are the top-rated email warm-up platforms for B2B outreach campaigns?

The best warm-up platforms are TrulyInbox, Lemwarm, and Mailwarm. These platforms allow you:

• Connect emails as many as you want
• Monitor your inbox placement in real time
• Keep your deliverability above 85%

The right pick depends on how your team collaborates and on monthly spending.

7. How to choose an email warm-up tool for a marketing team?

When choosing a tool, consider these points: 

• Verify if the tool helps to improve inbox placement
• Connects multiple accounts affordably
•  Offer a simple setup

You can even try free trials to choose the best option. 

8. Where to find affordable email warm-up tools for startups?

A startup should go with a platform with flat-rate pricing instead of per-account fees. This allows you to avoid overspending as you scale.

9. What are the best cold email warm-up tools for improving deliverability?

The best cold email warm-up tools automatically monitor your SPF, DKIM, and DMARC records while allowing you to customize your sending pace. TrulyInbox, Warmup, and Lemwarm are good options to go with.