Mailshake vs Warmbox: Best Cold Email Tool in 2025?

Choosing the right tool can make or break your cold email campaigns.

But with so many options out there, how do you decide which one is best for you?

In this post, we’ll take a deep dive into two popular choices: Mailshake vs Warmbox.

We’ll compare their features, pricing, and ease of use to help you determine which is the best fit for your needs. 

Let’s get started!

Mailshake vs Warmbox: Overview

To give you the most accurate comparison, we’ve rigorously tested both Mailshake and Warmbox.

We’ve used both platforms to send cold emails, track results, and analyze their key features.

This hands-on experience allows us to provide an insightful look at how each tool performs in real-world scenarios.

What is Mailshake?

Want to warm up your cold emails? Mailshake is your go-to tool. It helps you create highly personalized email outreach campaigns.

Think of it as your friendly automated assistant. It helps you connect with prospects without sounding like a robot.

Mailshake focuses on building relationships and increasing engagement.

It’s known for its simple interface and powerful features.

You can easily create email sequences, track your results, and even A/B test different messages to see what works best.

Also, explore our favourite Mailshake alternatives…

Key Benefits

• AI-Powered Email Writing: Stuck in a writer’s block? Mailshake’s AI email writer can help you craft compelling emails in seconds.
• Automated Follow-ups: Never let a lead slip through the cracks. Mailshake automatically sends follow-up emails so you can stay top-of-mind.
• A/B Testing: Not sure which subject line will perform best? Mailshake lets you A/B test different versions of your emails to see what resonates with your audience.
• Lead Catcher: Capture leads from anywhere on the web with their handy Chrome extension.

Pricing

Mailshake keeps its pricing simple with two main plans:

• Starter: Starts at $29/month.
• Email Outreach: $49/month
• Sales Engagement: Starts at $99/month.

They also offer a free trial so you can take it for a spin before committing to a plan.

What is Warmbox?

Have you ever heard of warming up your email? It’s like stretching before you run.

Warmbox helps you slowly increase the number of emails you send.

This way, email providers like Gmail don’t think you’re a spammer. Pretty cool, right?

It’s all about getting your emails into inboxes, not spam folders.

Also, explore our favourite Warmbox alternatives…

Key Benefits

• Automated warm-up: Warmbox automatically sends emails from your account to its network of inboxes, simulating real conversations and improving your sender reputation.
• Deliverability monitoring: Track your sender score and identify potential issues that could be hurting your email deliverability.
• Email content templates: Access a library of pre-written email templates designed to warm up your inbox and engage recipients.
• Multi-account support: Manage warm-up for multiple email accounts from a single dashboard.

Pricing

Warmbox offers a variety of plans to suit different needs and budgets.

• Solo: $19/month
• Start-up: $79/month
• Growth: $159/month
• Team: Contact us

Mailshake vs Warmbox: Feature Comparison

Let’s explore the core features of Mailshake and Warmbox, highlighting their strengths and weaknesses to help you make an informed decision for your cold email outreach.

Email Warm-Up Tool

Both Mailshake and Warmbox are email warm-up tools designed to improve email deliverability.

They automate the warm-up process, gradually increasing your sending volume and engagement to build a positive sender reputation with email providers like Gmail and Outlook.

This email warm up helps your emails land in the inbox instead of being marked as spam and filtered into the spam folder.

Using an email warm-up tool is one of the best practices for cold email outreach.

• Mailshake: Offers a dedicated email warm-up tool with automated warm-up schedules and best practices to improve your email deliverability. You can warm up your email account and ensure your emails land in the inbox.
• Warmbox: Provides a comprehensive warm-up service with advanced features like real email conversations with other users. This helps boost your warm-up progress and improve email deliverability even faster. Warmbox is considered one of the best email warm-up tools available.

Email Account and Inbox Placement

Both platforms focus on improving your email account’s health and ensuring your emails land in the inbox.

• Mailshake: Helps you warm up your email account and provides tools to monitor your sender reputation, ensuring your emails avoid spam filters and reach the recipient’s primary inbox. Mailshake is a great option to warm up a new email account or improve your email deliverability for an existing one.
• Warmbox: Uses a network of real email accounts to generate genuine email activity, making your warm-up process appear more natural to email service providers and improving your chances of landing in the inbox. This is a key feature for those looking to warm up their inbox effectively.

Integration with Other Email Platforms

Both tools integrate with popular email service providers and cold email platforms.

• Mailshake: Integrates seamlessly with major email providers like Gmail and Outlook, allowing you to connect your email account and manage your cold email outreach campaigns from a single platform. This makes it a versatile tool for your email marketing campaigns.
• Warmbox: Also offers integrations with major email providers, making it easy to connect your email account and use their warm-up service alongside your existing email marketing efforts.

Email Sending and Deliverability

Both tools prioritize getting your emails delivered and improving your deliverability rate.

• Mailshake: Focuses on helping you craft effective email content and personalize your messages to improve open rates and deliverability rates. They also provide tools to monitor your email performance and identify any issues that may be affecting your deliverability.
• Warmbox: Emphasizes building trust with email providers through their advanced warm-up strategies. By simulating real email conversations and gradually increasing your sending volume, Warmbox helps establish a positive email reputation and ensures your emails land in the inbox. This effective email warm-up process is crucial for maintaining a good reputation with email providers.

Cold Email Outreach and Campaign Management

Both platforms offer features relevant to cold email outreach, though their focus differs.

• Mailshake: Provides a comprehensive suite of cold email outreach tools, including email templates, automated sending schedules, and detailed analytics to track your campaign performance. This makes Mailshake a powerful cold email software for managing your cold email campaigns.
• Warmbox: Primarily focuses on email warm-up but can be used in conjunction with other cold email software to improve the deliverability of your cold email campaigns. You can connect your email account to Warmbox while using an email warm-up service to enhance your cold outreach efforts.

Email Template Library and Customization

• Mailshake: Offers a library of pre-designed email templates for various cold outreach scenarios. You can customize these templates to match your brand and messaging, making it easier to create effective email content.
• Warmbox: Focuses on improving deliverability through warm-up, so it doesn’t offer a built-in email template library. However, they provide guidance and best practices for crafting effective emails that avoid spam filters and end up in spam.

Ease of Use

Both platforms are user-friendly and designed to simplify your email warm up and cold email tasks.

• Mailshake: Offers an intuitive interface with easy-to-use tools for creating and sending cold emails. Their platform is suitable for beginners and experienced marketers alike. Using an email platform like Mailshake can streamline your email marketing efforts.
• Warmbox: Provides a simple and straightforward setup process, allowing you to connect your email account and start warming up your inbox quickly. Their user-friendly interface makes it easy to monitor your warm-up progress and adjust your settings as needed. Warmbox is a great warmup tool for those new to email warm up.

This detailed comparison, covering everything from email warm-up tools and sender reputation to email templates and deliverability rates, should help you choose the best tool for your needs.

What to Look For When Choosing a Cold Email Tool?

• Deliverability: This is non-negotiable. Your tool should prioritize getting your emails into the inbox. Look for features like email warm-up, sender reputation management, and spam testing.
• Ease of Use: You don’t want to spend hours figuring out how to use the software. Choose a tool with an intuitive interface & straightforward navigation.
• Integrations: Does the tool integrate with the existing CRM, email provider, or other essential business tools? Seamless integrations can save you time and streamline your workflow.
• Support: Problems happen. Ensure the tool offers reliable customer support via email, chat, or phone.
• Pricing: Consider your budget and the number of emails you must send. Look for a tool that offers flexible pricing to match your needs.
• Unique Features: Some tools offer unique features, such as AI personalization, advanced analytics, or multi-channel outreach. Consider which features are most important to your cold email strategy.
• Trial Period: Most reputable tools offer a free trial or demo. Take advantage of this to test the software and see if it suits you.

Final Verdict (Our Pick)

For a dedicated email warm-up tool in 2025, Warmbox emerges as the winner.

Its advanced features, like real email conversations and a focus on building trust with email providers, give it an edge in warming up your inbox and ensuring your emails land safely.

While Mailshake offers a solid platform with many features, Warmbox excels specifically at improving deliverability and preventing your messages from landing in spam.

We’ve spent countless hours testing and analyzing both platforms, sending emails and scrutinizing results.

With this hands-on experience, we’re confident in recommending Warmbox as the superior choice for maximizing your email warm-up and ensuring your messages reach the intended recipients.

Whether you’re managing many emails or just starting with a new account, Warmbox can significantly improve your email warmup process and overall deliverability.

More of Mailshake

Here’s a comparison of Mailshake with its alternatives:

• Mailshake vs Instantly: Mailshake offers more customization and comprehensive analytics for email campaigns. Instantly excels in automation, engagement, and rapid campaign setup.
• Mailshake vs Snov IO: Mailshake focuses on streamlined email outreach and AI-powered writing. Snov IO is stronger in email finding, verification, and a broader sales suite.
• Mailshake vs Apollo: Mailshake provides user-friendly personalized email outreach. Apollo offers a vast B2B contact database and comprehensive sales intelligence.
• Mailshake vs Hunter IO: Mailshake specializes in email campaign automation and follow-ups. Hunter IO is primarily an email finder and verifier, with basic sending.
• Mailshake vs Reply IO: Mailshake focuses on efficient email automation and A/B testing. Reply IO provides robust multi-channel outreach, including LinkedIn and calls.
• Mailshake vs UpLead: Mailshake optimizes email outreach automation and deliverability. UpLead is a powerful source for high-quality, verified B2B lead data.
• Mailshake vs Lemlist: Mailshake offers straightforward, affordable email campaigns. Lemlist excels in hyper-personalization with rich media and advanced multi-channel features.
• Mailshake vs Woodpecker: Mailshake leads with AI-driven email and personalization. Woodpecker focuses on human-like sending patterns and strong email deliverability.
• Mailshake vs Smartlead: Mailshake simplifies personalized email campaigns. Smartlead offers unlimited mailboxes, advanced AI warm-ups, and multi-channel scaling.
• Mailshake vs Saleshandy: Mailshake handles varied outreach channels with automation. Saleshandy specializes in cold emailing with deliverability features and a lead finder.
• Mailshake vs Klenty: Mailshake is user-friendly for email automation beginners. Klenty provides a comprehensive sales engagement platform with deeper CRM integration.
• Mailshake vs Maildoso: Mailshake provides integrated email warm-up and campaign management, while Maildoso offers a robust multi-channel experience and email hosting services.
• Mailshake vs Manyreach: Mailshake focuses on personalized cold email automation. Manyreach offers cost-effective scalability with unlimited prospects and a unified inbox.
• Mailshake vs Warmy: Mailshake includes email warm-up as part of its outreach. Warmy is a dedicated email deliverability tool, specializing in advanced warm-up processes.

More of Warmbox

Here’s a comparison of Warmbox with its alternatives, highlighting their unique strengths:

• Warmbox vs Instantly: Warmbox is a specialized email warm-up tool. Instantly is an all-in-one cold email outreach platform, including its warm-up feature.
• Warmbox vs Snov IO: Warmbox ensures email deliverability and sender reputation. Snov IO offers a broader suite for lead generation, verification, and multi-channel campaigns.
• Warmbox vs Apollo: Warmbox solely focuses on improving email deliverability through warming. Apollo is a comprehensive sales intelligence and engagement platform with lead finding.
• Warmbox vs Hunter IO: Warmbox is an email warm-up tool for inbox placement. Hunter IO primarily finds and verifies email addresses and offers basic campaigns.
• Warmbox vs Reply IO: Warmbox is a dedicated email warm-up solution. Reply IO is a multi-channel sales engagement platform with broader automation features.
• Warmbox vs UpLead: Warmbox enhances email deliverability for outbound efforts. UpLead is a lead generation platform that provides high-quality, verified B2B contact data.
• Warmbox vs Lemlist: Warmbox is a standalone email warm-up tool. Lemlist offers a more comprehensive outreach platform with advanced personalization and its warm-up (Lemwarm).
• Warmbox vs Woodpecker: Warmbox focuses on automated email warm-up for deliverability. Woodpecker is a cold email automation platform that prioritizes human-like sending and deliverability.
• Warmbox vs Smartlead: Warmbox ensures email deliverability through dedicated warming. Smartlead is a comprehensive cold email outreach platform, including its warm-up.
• Warmbox vs Saleshandy: Warmbox specializes in email warm-up to boost inbox placement. Saleshandy offers a sales engagement platform with email tracking and warm-up features.
• Warmbox vs Klenty: Warmbox is a dedicated email warm-up service. Klenty is a sales engagement platform that automates outreach sequences and integrates with CRMs.
• Warmbox vs Maildoso: Warmbox is a dedicated email warm-up tool with detailed monitoring. Maildoso also offers warm-up, along with a master inbox and custom domains.
• Warmbox vs Manyreach: Warmbox ensures email deliverability through warming. Manyreach is a comprehensive cold outreach platform with unlimited prospects and diverse features.
• Warmbox vs Warmy: Both Warmbox and Warmy are dedicated email warm-up services. They primarily differ in network size, pricing structures, and specific advanced features for deliverability.

Frequently Asked Questions