7 Best MailToaster Alternatives in 2026 for Cold Email Teams

I started with MailToaster for email warm-up, but as I tested more setups, I wanted to see what other tools actually offer.

So, I looked at warm-up quality, network type, visibility into deliverability, and how each tool holds up once mailbox count starts growing.

In this guide, I’ve listed the 7 best MailToaster alternatives you can use to improve your email deliverability and maintain a better sender reputation.

These tools can also help you run your cold email campaigns more smoothly as you start scaling.

Why You Need a MailToaster Alternative

MailToaster works when the goal is basic automated warm-up.

But from what I saw, the limitations show up once deliverability becomes more important than just sending warm-up emails.

The main gaps are:

• I could not control how the warm-up behaves
  
  
• There was no clear view of mailbox health
  
  
• Inbox placement testing was missing
  
  
• It was harder to manage multiple inboxes
  
  
• Scaling did not give enough visibility into what was actually happening
  

That becomes a problem quickly.

Because warm-up alone is not enough.

Once campaigns start running, I need to know:

• Is this inbox ready
  
  
• Are emails landing in primary or spam?
  
  
• Can I safely increase sending
  

That’s where most teams start looking for alternatives.

Quick Comparison Table of The 7 Best Mailtoaster Alternatives

These are the main limitations I noticed that many people face while using MailToaster:

• No manual control over how warm-up runs (fully automated only)
  
  
• Only solves warm-up, not the full deliverability setup
  
  
• Limited control as you start handling multiple inboxes or scaling outreach

Because of these limitations, many teams start exploring better options that fit their setup.

Here are some of the best MailToaster alternatives you can consider.

1. Warmforge

Warmforge is a complete email warm-up and deliverability tool built to help you land in the primary inbox without compromising scale.

It automatically warms your mailboxes using AI-written emails.

At the same time, it also monitors your mailbox health, runs placement tests to check where your emails land across different ESPs, and checks DNS, MX records, and blacklist status.

Warmforge also tracks something called Heat Score.

This gives you a clear reputation indicator for each mailbox, so you know how healthy your inbox is before increasing sending volume.

Everything is built to protect your sender reputation before and during outreach.

It works specifically with Google Workspace and Microsoft 365 mailboxes.

And the warm-up pool only includes aged Google and Microsoft accounts to keep the environment stable.

If I were already sending through Salesforge, getting unlimited Warmforge slots made the setup easier to manage.

Warmforge felt more complete when I wanted everything in one place, not just warm-up but also monitoring and testing.

Key features

• AI warms your mailboxes automatically with human-like behavior and unique emails
  
  
• All mailboxes run in one premium warm-up pool by default (no mixed-quality networks)
  
  
• Only aged Google Workspace and Microsoft 365 accounts are used
  
  
• Placement tests show exactly where your emails land across ESPs
  
  
• DNS, MX records, and blacklist status are checked automatically
  
  
• Heat Score helps you track mailbox reputation and readiness
  
  
• Always-on warm-up keeps your sending pattern stable
  
  
• You can scale by adding mailbox slots (unlimited if using Salesforge)
  

Pricing

Warmforge offers flexible pricing based on mailbox slots, along with built-in deliverability monitoring and placement testing.

Email Warm-up:

• Starts at $9 per mailbox slot per month (billed annually)
  
  
• 1 free slot included
  
  
• Includes AI warm-up, health checks, and 1 placement test/month
  

Placement Tests:

• Pro Plan: $32.5/month (100 tests, 50 mailboxes per test)
  
  
• Growth Plan: $140.8/month (unlimited tests, 250 mailboxes per test)
  

Warmforge felt easier to scale as I added more inboxes, and the cost stayed more predictable compared to per-inbox tools.

Pros

• Premium warm-up pool by default, no lower-quality tiers or upgrades required
  
  
• Only aged Google Workspace and Microsoft 365 accounts are used, keeping the environment controlled and stable
  
  
• You can run placement tests before sending campaigns and see exactly where your emails land
  
  
• Warm-up, placement testing, DNS checks, and blacklist monitoring are all in one place
  
  
• Heat Score gives you a clear view of mailbox health before you scale sending
  

What I Found Limiting 

• Limited to Google Workspace and Microsoft 365 accounts only
  
  
• Advanced placement testing beyond the included free test requires a paid plan
  

2. Lemwarm

Lemwarm is a warm-up and deliverability booster tool built to help your emails land in the inbox.

It starts by helping you set up your email properly, including things like SPF, DKIM, DMARC, MX records, and tracking domain.

Once that is done, it begins the warm-up process by sending automated emails to a large network of domains.

These emails also get replies, so the activity looks natural. This helps build your domain reputation over time.

After the warm-up phase, Lemwarm continues to monitor your deliverability.

It tracks your sending behavior, checks for spam risks, and gives you alerts and insights so you can improve your campaigns and avoid issues.

Lemwarm felt stronger when I wanted setup guidance and ongoing alerts, not just warm-up activity.

Key features

• Automatically warms up your email using a large network of inboxes
  
  
• Sends personalized warm-up emails and replies to keep activity natural
  
  
• Helps set up SPF, DKIM, DMARC, MX records, and tracking domain
  
  
• Monitors deliverability and alerts you about spam risks
  
  
• Tracks sending behavior and warns if your content may trigger spam filters
  
  
• Provides daily insights, reports, and tips to improve performance
  
  
• Allows you to warm up your real email templates
  
  
• Warm-up network can be tailored based on your industry (in higher plans)
  

Pricing

Lemwarm offers per-email pricing with different plans based on how much control and personalization you need.

Essential Plan – $24/month per email (billed yearly)

You get basic warm-up, setup checks, reports, and access to the 20k+ domain network.

Smart Plan – $40/month per email (billed yearly)

Includes everything in Essential, plus personalized warm-up, template warm-up, and custom alerts.

Custom Plan – Contact sales

For larger teams with more than 10 users and custom needs.

Lemwarm started to feel expensive pretty quickly once I added more inboxes since pricing is per email.

Pros

• Helps with both warm-up and technical setup (SPF, DKIM, DMARC, MX)
  
  
• Gives regular insights and alerts about deliverability and spam risks
  
  
• Supports personalized warm-up emails and real template warm-up
  
  
• Warm-up network can be tailored based on your industry
  

What I Found Limiting 

• Pricing is per email account, which can increase as you scale
  
  
• Some advanced features like personalization and alerts are only in higher plans
  

3. Warmbox

Warmbox is an email warm-up tool built to improve your inbox reputation and help your emails land in the inbox.

Once you connect your inbox, it starts the warm-up process automatically.

It sends emails, opens them, replies, marks them as important, and removes them from spam to create positive engagement.

It uses GPT-4 and hybrid logic to make these interactions look natural.

At the same time, it connects your inbox to a private network of 35,000+ inboxes across different email providers.

It also gives you a dashboard where you can monitor your deliverability and see how your inbox reputation improves over time.

Warmbox felt more flexible than some other tools here, especially if I wanted to shape the warm-up pattern myself. But it gave me less clarity on full mailbox health.

Key features

• Automatically warms your inbox with human-like interactions (send, open, reply, remove from spam)
  
  
• Uses GPT-4 and hybrid logic to generate realistic warm-up activity
  
  
• Works with almost all email providers including Gmail, Outlook, Yahoo, SMTP, and others
  
  
• Offers different warm-up modes like growth, flat, and random
  
  
• Fully customizable warm-up schedule and behavior
  
  
• Includes spam score monitoring and live DNS/blacklist checker
  
  
• Dashboard with detailed reporting to track deliverability
  
  
• Supports multiple inboxes and team members for agency use
  

Pricing

Warmbox offers simple pricing based on the number of inboxes and daily warm-up activity.

Solo – $15/month

You can warm up 1 inbox with up to 50 emails per day.

Start-up – $69/month

Supports 3 inboxes with higher daily limits and up to 3 team members.

Growth – $139/month

Let's you warm 6 inboxes with higher limits and supports up to 6 team members.

Team – Custom pricing

For larger teams with higher sending volume and custom setup.

Warmbox worked fine at the start, but as I added more inboxes, I had to move to higher plans with limits.

Pros

• Supports almost all email providers, so you can use your existing setup
  
  
• Warm-up behavior is customizable based on your needs
  
  
• Includes spam removal, replies, and realistic engagement
  
  
• Provides reporting and monitoring to track deliverability
  

What I Found Limiting 

• Works with a mixed network of different email providers, so the quality of interactions may not be consistent
  
  
• No clear single reputation indicator, like a score to quickly judge mailbox health
  
  
• Focus is mainly on warm-up and interaction, not full deliverability monitoring in one place
  

4. Mailivery

Mailivery is an email warm-up and deliverability tool designed to help your emails land in the primary inbox.

It improves your sender reputation by creating real conversations in your inbox using AI and a peer-to-peer network of active mailboxes.

It sends emails, replies to them, and even moves emails from spam to inbox to improve deliverability in real time.

It also gives you detailed analytics so you can see how many of your emails are landing in spam and how your reputation is improving.

You can also check blacklist status and get recommendations to fix issues.

One important thing here is that Mailivery allows you to warm up unlimited mailboxes, and you manage everything from one dashboard.

Mailivery felt easier to scale when I was managing multiple inboxes under one plan.

But since limits are shared, I had to be careful about how I used that volume.

Key features

• AI-powered warm-up with real email interactions (send, reply, move from spam)
  
  
• Uses a peer-to-peer network of active mailboxes for realistic engagement
  
  
• Tracks spam rate and sender reputation with detailed analytics
  
  
• Blacklist monitoring across 70+ blacklists with recommendations
  
  
• Let's you customize sending volume and timing for warm-up
  
  
• Keep warm-up activity separate in dedicated folders so it doesn’t disturb your inbox
  
  
• Supports unlimited mailboxes under one account
  
  
• Team management with roles and shared dashboard
  
  
• API access and custom solutions for larger teams

Pricing

Mailivery offers pricing based on total daily warm-up volume, with unlimited mailboxes included.

Starter – $29/month

You get 200 warm-up emails/day (shared), unlimited mailboxes, basic blacklist monitoring, and 2 team users.

Professional – $79/month

Includes 800 warm-up emails/day (shared), more blacklist monitors, more verification credits, and 4 team users.

Business – $199/month

Gives 2,500 warm-up emails/day (shared), highest limits, more monitoring, and support for 10 team users.

Mailivery felt better for scaling because I didn’t have to think about per-inbox cost, but I had to manage how the shared volume was used.

Pros

• You can scale across many inboxes without worrying about per-inbox cost
  
  
• Helps improve inbox placement by creating real interactions
  
  
• Gives clear visibility into how many emails are going to spam
  
  
• Helps you identify and fix blacklist issues early
  
  
• Makes it easier for teams to manage multiple inboxes from one place
  

What I Found Limiting 

• Warm-up capacity is shared, so performance depends on how you distribute usage
  
  
• Can be harder to manage results when many inboxes run under one limit
  
  
• No simple score or indicator to quickly judge mailbox readiness
  
  
• Doesn’t give full control over all parts of deliverability in one place
  

5. Warmup Inbox

Warmup Inbox is an email warm-up tool built to improve your sender reputation and help your emails reach the inbox.

Once you connect your inbox, it starts sending and replying to emails automatically using a network of real inboxes.

This creates natural activity and helps your emails avoid spam and promotions folders.

It also gives you reports and alerts so you can monitor your deliverability and fix issues when something goes wrong.

You can also test your emails using their spam checker to see where they land across different providers.

Warmup Inbox felt simple and quick to get started with, especially for basic warm-up.

But it didn’t give much depth when I wanted to understand deliverability in detail.

Key features

• Automatically warms your inbox by sending and replying to emails
  
  
• Helps improve sender reputation and avoid spam or promotions tab
  
  
• Provides alerts when deliverability issues or risks are detected
  
  
• Includes spam checker to test inbox placement across providers
  
  
• Offers reports and recommendations to maintain inbox health
  
  
• Supports multiple providers like Gmail, Outlook, Zoho, SendGrid, and more
  
  
• Allows you to customize warm-up settings, templates, and topics (in higher plans)
  
  
• Supports language-based warm-up and ESP-specific warm-up

Pricing

Warmup Inbox offers per-inbox pricing with different plans based on daily warm-up limits and features.

Basic – $15/month per inbox

You get basic warm-up with 75 emails/day, reporting, and access to the inbox network.

Pro – $49/month per inbox

Includes higher volume, better reply rates, and more control like templates, topics, and scheduling.

Max – $79/month per inbox

Gives highest volume, advanced setup checks, and more control with premium support.

Warmup Inbox felt affordable at the beginning, but the cost kept increasing with every new inbox I added.

Pros

• Helps you consistently land in the inbox instead of spam or promotions
  
  
• Makes it easier to maintain sender reputation with continuous warm-up
  
  
• Gives clear alerts when something goes wrong so you can fix issues early
  
  
• Lets you test your emails before sending to avoid deliverability problems
  
  
• Works with multiple providers, so you can keep your existing setup
  

What I Found Limiting 

• Advanced controls and customization are only available in higher plans
  
  
• No single clear indicator to quickly understand mailbox health
  
  
• Focus is mainly on warm-up, not full deliverability control
  
  
• You still need to monitor and adjust settings regularly to maintain results
  

6. Warmy.io

Warmy is an all-in-one email deliverability tool built to make your email channel more reliable.

It helps you warm up your domains and IPs using AI-driven automation.

At the same time, it gives you insights into where your emails are landing, in the inbox, spam, or promotions, so you can improve performance.

It also integrates with tools like Google Postmaster and provides data on your domain reputation, DNS setup, and overall deliverability.

The goal is simple, help your emails avoid spam and consistently reach the primary inbox.

Warmy felt more focused on data and insights, especially when I wanted to see what’s happening behind the scenes.

But it felt heavier if I just needed a simple warm-up setup.

Key features

• AI-powered warm-up that prepares your domains and IPs for outreach
  
  
• Real-time deliverability insights showing inbox, spam, or promotions placement
  
  
• Integration with Google Postmaster for deeper deliverability data
  
  
• Helps monitor domain reputation and DNS configuration
  
  
• Uses seed lists to test and track inbox placement
  
  
• Includes email verification and deliverability optimization tools
  
  
• Provides a centralized dashboard for teams to monitor performance
  
  
• Works across major providers like Gmail, Outlook, Yahoo, and more
  

Pricing

Warmy pricing is not listed publicly.

B2B Sender – Custom pricing

Designed for business outreach, with warm-up focused on providers like Google Workspace and Microsoft 365.

B2C Sender – Custom pricing

Built for consumer outreach, focusing on providers like Gmail, Yahoo, and Outlook.

Custom Plan – Custom pricing

Tailored solution based on your needs, with access to deliverability experts and advanced support.

Warmy was harder to judge on pricing upfront since it’s custom, but it felt more suited for larger setups than smaller ones.

Pros

• Helps you improve inbox placement and avoid spam with AI-based optimization
  
  
• Gives clear visibility into where your emails are landing across providers
  
  
• Helps you identify and fix deliverability issues like DNS and domain reputation
  
  
• Makes it easier to monitor deliverability from one central dashboard
  

What I Found Limiting 

• Pricing is not transparent, so it’s harder to estimate the cost upfront
  
  
• Can feel complex if you only need a simple warm-up tool
  
  
• Requires regular monitoring to get consistent results
  

7. TrulyInbox

TrulyInbox is an AI-powered email warm-up platform built to improve inbox placement and help your emails get read.

You connect your email, choose a warm-up strategy, and the tool takes over.

It generates warm-up emails based on your industry and sends them with human-like timing and replies.

It also gives you detailed deliverability insights, including where your emails are landing and when your mailbox is ready for outreach.

You get a deliverability score and an outreach readiness indicator so you know exactly when to start sending campaigns.

It works with a large network of real accounts across major providers to create natural interactions.

TrulyInbox gave clearer signals, like deliverability score and readiness, which helped me decide when to start outreach.

But I still had to manage limits and set up carefully.

Key features

• AI-generated warm-up emails based on your industry and real outreach context
  
  
• Multiple warm-up strategies like progressive, random, and flat
  
  
• Deliverability score (0–100) to track mailbox health
  
  
• Outreach readiness indicator to know when to start sending
  
  
• 90-day deliverability history with ESP-level breakdown
  
  
• Account health monitoring including SPF, DKIM, DMARC, and blacklist checks
  
  
• Bounce protection system to keep the warm-up pool clean
  
  
• Supports unlimited inbox connections with one dashboard
  
  
• Works with multiple providers like Gmail, Outlook, SMTP, and more
  

Pricing

TrulyInbox offers pricing based on daily warm-up volume, while allowing unlimited inbox connections.

Free Plan – $0

You can use 1 account with basic warm-up and limited daily emails.

Starter – $22/month

You get 200 warm-up emails/day with unlimited accounts and AI warm-up features.

Growth – $59/month

Includes higher volume (1,000 emails/day), ESP-level analytics, and more control over reply rates.

Scale – $142/month

Gives highest volume (3,000 emails/day), advanced settings, and higher customization.

TrulyInbox felt easier to scale than per-inbox tools, but I still had to watch the daily limits based on the plan

Pros

• Helps you land in the inbox more consistently with AI-driven warm-up
  
  
• Gives clear visibility into deliverability with score and readiness indicator
  
  
• Makes it easier to know when your mailbox is ready before starting outreach
  
  
• Supports scaling easily with unlimited inbox connections
  
  
• Works with multiple providers, so you don’t need to change your setup
  

What I Found Limiting 

• Daily warm-up limits depend on your plan (200, 1,000, or 3,000 emails/day), which can slow down scaling
  
  
• You need to check the deliverability reports regularly to understand performance
  
  
• Results depend on how well you configure and run the warm-up setup
  

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Conclusion

Choosing a MailToaster alternative depends on what stage your setup is in.

If the goal is simple warm-up, tools like Warmup Inbox or Warmbox are enough.

If I’m managing many inboxes, Mailivery makes more sense because of its pricing model.

If I want deeper insight into deliverability, Warmy.io or TrulyInbox give more visibility into where emails are landing.

But when I look at the full workflow, the gap is clear.

Most tools here solve one part:

• Either warm-up
  
  
• Or insights
  
  
• Or scaling
  

Very few combine all three.

That’s where Warmforge felt different in my testing.

Instead of switching between tools, I could:

• Warm up mailboxes
  
  
• Check DNS and blacklist status
  
  
• Run placement tests
  
  
• Track mailbox health with Heat Score
  
  

That made it easier to decide when to scale, instead of guessing.

If the goal is to improve deliverability and scale cold outreach without managing multiple tools, Warmforge is a more practical starting point.

Try Warmforge with 1 free warming slot and 1 free placement test, and see how your emails actually perform before you scale.