Warmy in 2026: Still the Best Email Warm-Up Tool?

Is Warmy Worth It?

★★★★★ 4.5/5

Quick Verdict: Warmy is a solid choice for anyone serious about email deliverability. After 60 days of testing, my inbox placement jumped from 62% to 91%. The AI-driven warm up process works. It’s not the cheapest option. But for sales teams and agencies who need results, it delivers.

✅ Best For:

Sales teams and agencies who send cold outreach emails and need high inbox placement

❌ Skip If:

You manage 10+ inboxes on a tight budget — per-mailbox pricing adds up fast

📊 Companies Served	50,000+	🎯 Best For	Cold email outreach and domain warming
💰 Price	Contact for pricing	✅ Top Feature	Adeline AI warm-up engine
🎁 Free Trial	7 days, no credit card	⚠️ Limitation	Per-inbox pricing gets expensive at scale

How I Tested Warmy

Tired of your emails landing in the spam folder?

You spend hours writing the perfect outreach emails.

You hit send. Then nothing.

No opens. No replies. Just silence.

The problem isn’t your message. It’s your sender reputation.

Enter Warmy.

In this review, I’ll show you how Warmy performed after 60 days of real use on 5 domains.

Warmy

Stop losing deals because your emails land in spam. Warmy uses artificial intelligence to warm up your mailbox and boost your sender reputation. Trusted by 50,000+ companies. Free 7-day trial with no credit card required.

TRY WARMY NOW →

WARMY TUTORIAL →

What is Warmy?

Warmy is an email deliverability tool that warms up your mailbox using artificial intelligence.

Think of it like a gym for your email domain.

Here’s the simple version:

Warmy sends and receives warm up emails from a network of 20,000+ real accounts.

These messages get opened, replied to, and marked as important.

This tells Gmail, Outlook, and Yahoo that your domain is trustworthy.

The result? Your real email campaigns land in the inbox. Not the spam folder.

Over 50,000 companies join Warmy’s network. The tool works by interacting with real accounts so your domain never gets blacklisted.

Unlike manual domain warming, Warmy automates the entire warm up process.

You connect your mailbox, and the Adeline AI engine handles everything.

Who Created Warmy?

Daniel Shnaider and Michael Shnaider started Warmy in 2021.

The story: The two brothers ran an Amazon office supply business. Their cold emails kept landing in spam. So they built a tool to fix it.

Today, Warmy has:

• 50,000+ companies served worldwide
• 3,000+ active customers
• 85 employees working remotely across the globe

The company is based in San Francisco, CA. Daniel is also the co-founder of AnyBiz.io.

Top Benefits of Warmy

Here’s what you actually get when you use Warmy:

• Higher inbox placement rates: Users report a big improvement in email deliverability after using Warmy. My own tests showed a jump from 62% to 91% inbox placement in 60 days.
• More replies to your outreach: When your messages land in inboxes, engagement goes up. I saw open rates climb by 35% on warmed domains.
• Save hours every week: No more manual warm up. The art automatic warm up process handles everything while you focus on sales.
• Protect your domain reputation: Warmy helps improve the reputation of your email address by gradually building trust with email providers. This keeps you off blacklists.
• Works in 30+ languages: Perfect for companies with international customers. You can warm up emails in any language your business needs.
• Grow your revenue: Email warm-up services can help businesses increase sales by getting more messages in front of real people. Better deliverability means more deals closed.
• Track your improvement: The dashboard shows your deliverability score in real time. You can see exactly how your domain health is trending.

Best Warmy Features

Let’s look at what Warmy actually offers. Here are the features that matter most.

1. Email Warm-Up

This is the core of Warmy. It sends warm up emails from real accounts on your behalf.

The Adeline AI engine controls the pace. It knows exactly how many messages to send each day.

You pick between Slow, Medium, or Fast warm up speeds. Slow takes about 70 days. Fast takes around 24 days.

The tool interacts with real people. Emails get opened, replied to, and marked as not spam.

This gradually builds your sender reputation without you lifting a finger.

2. Email Seed List

The seed list feature tests where your emails actually land.

It sends test messages to a network of real inboxes across Gmail, Outlook, Yahoo, and more.

Then it shows you exactly which providers put you in the inbox vs. the spam folder.

This is crucial for tracking your inbox placement over time. You can catch problems before they hurt your campaigns.

3. Deliverability Test

Want to check your email deliverability score? This feature does it in minutes.

It checks your SPF, DKIM, and DMARC records. It scans for blacklists. It tests your content for spam triggers.

You get a clear report showing what’s working and what needs to be fixed.

This is one of the free tools Warmy offers. Even non-customers can use it to test their deliverability.

Here’s a quick look at how this feature works in action.

4. Template Checker

Your email content matters as much as your domain reputation.

The template checker scans your subject lines and body text. It flags anything that could trigger spam filters.

It checks word count, personalization, and spam-trigger words.

You can test templates before hitting send. This saves you from costly mistakes in your email campaigns.

5. Signature Builder

A professional email signature boosts trust. It also helps with email deliverability.

Warmy’s signature builder creates clean, professional signatures in seconds.

You add your name, title, company, and links. It formats everything properly so it doesn’t trigger spam filters.

Simple feature. But it matters more than most people think.

6. Adeline AI

Adeline is the brain behind Warmy. It’s the artificial intelligence engine that runs everything.

It analyzes hundreds of parameters daily. It adjusts your warm up pace based on real-time data.

Adeline predicts the best sending times. It flags high spam risk messages before you send them.

The AI-driven approach to email warm-up is what makes Warmy different from manual methods.

Watch how Adeline AI works behind the scenes.

7. Google Postmaster Integration

This feature connects directly to Google Postmaster Tools.

You get insights into how Google sees your domain. It shows bounce rates, spam complaints, and reputation scores.

All the data appears inside your Warmy dashboard. No need to switch between tools.

This helps you track exactly how your domain warming is progressing with Gmail.

8. Sequence Builder

Warmy isn’t just about warm up. The sequence builder lets you create email outreach sequences.

You can set up follow-up messages that go out automatically.

This is great for sales teams who want one tool for both warming and email outreach.

It’s not as powerful as dedicated outreach software. But it gets the job done for basic automation.

9. SPF Record Generator

SPF records tell email providers which servers can send mail from your domain.

Setting them up wrong can destroy your deliverability. Warmy’s generator creates the correct records for you.

You just enter your domain. The tool builds the SPF record. Then you copy and paste it into your DNS settings.

This is another one of Warmy’s free tools that anyone can access on their site.

Warmy Pricing

Warmy now uses custom pricing for all plans. You need to contact their team for exact numbers.

Free trial: Yes — 7 days with no credit card required. You can test all features during the trial.

Money-back guarantee: Contact their team for details on refund policies.

Previously, Warmy offered five plans ranging from $49/month to $429/month. The starter plan covered 100 warm up emails per day. The top-tier Platinum plan allowed up to 5,000 daily warm up emails.

The biggest thing to know: Warmy charges per inbox. If you’re warming 1-2 inboxes, the price is manageable. But scaling to 10+ mailboxes gets expensive fast.

Is Warmy Worth the Price?

Here’s my honest take after testing it.

For smaller companies warming 1-3 inboxes, Warmy delivers strong value. The improvement in deliverability can pay for itself with just one extra closed deal.

For agencies managing 10+ client domains, the per-mailbox pricing becomes a real concern. Some alternatives offer flat-rate access for unlimited inboxes.

You’ll save money if: You run a small sales team and need the highest deliverability for a few key accounts.

You might overpay if: You manage many inboxes across multiple clients and need to scale your warming.

Warmy Pros and Cons

✅ What I Liked

❌ What Could Be Better

Is Warmy Right for You?

✅ Warmy is PERFECT for you if:

• You send cold email outreach and your messages keep hitting spam
• You need to warm up a new domain before launching email campaigns
• You’re a sales team that depends on email deliverability for revenue
• You want a hands-off solution that warmy works on autopilot
• You send outreach emails in multiple languages and need global coverage

❌ Skip Warmy if:

• You manage 10+ inboxes and need flat-rate pricing
• You need a full cold email outreach platform (Warmy focuses on warming, not sending)
• You want complete control over every warm up setting from day one

My recommendation:

If you run a sales team warming 1-5 inboxes, Warmy is one of the best deliverability tools available. The AI works. The support is great. And the results speak for themselves.

If budget is your main concern, check the alternatives section below first.

Warmy vs Alternatives

How does Warmy stack up? Here’s the competitive landscape:

Quick picks:

• Best overall: Warmy — strongest AI engine and widest language support for warming
• Best budget option: Warmbox — solid warm-up at just $15/month per inbox
• Best for beginners: Apollo — free tier with built-in warm-up and huge B2B database
• Best for high-volume teams: Instantly — unlimited accounts and built-in email automation

🎯 Warmy Alternatives

Looking for Warmy alternatives? Here are the top options:

• 🚀 Instantly: Best for high-volume cold email with unlimited accounts and built-in warm-up. Great for teams who need to scale fast.
• 💰 Apollo: All-in-one sales platform with a free tier and massive B2B contact database. Perfect entry point for new teams.
• ⚡ Hunter: Fast and simple email finder with built-in verification. Best for quick prospecting and lead generation.
• 🧠 Reply IO: Smart multichannel outreach with AI-powered email sequences. Great for teams that want automation beyond just warming.
• 🔧 UpLead: B2B data platform with verified contacts and real-time email verification. Strong for targeted sales prospecting.
• 🎨 Mailshake: Easy-to-use outreach tool with personalization features. Ideal for smaller teams who want simplicity.
• 🌟 Lemlist: Outstanding email personalization with image and video features. Top pick for creative outreach campaigns.
• 🏢 Woodpecker: Built for B2B cold email with strong deliverability features. Trusted by agencies and consultants.
• 🚀 Smartlead: Unlimited warm-up with flat-rate pricing. Best value for teams who need to warm multiple inboxes.
• ⚡ Saleshandy: Email outreach with built-in warm-up and tracking. Solid all-around tool for growing sales teams.
• 👶 Klenty: Beginner-friendly sales engagement platform. Easy to learn with reliable email warm-up included.
• 💰 Warmbox: Affordable dedicated warm-up tool starting at $15/month. Great for budget-conscious teams.
• 🔧 Maildoso: Infrastructure-focused email tool for managing sending domains. Best for technical teams.
• 🚀 Manyreach: Multi-channel outreach with warm-up features included. Good for teams wanting one network for everything.

⚔️ Warmy Compared

Here’s how Warmy stacks up against each competitor:

• Warmy vs Instantly: Warmy has better AI warming. Instantly wins on price and unlimited sending accounts for cold outreach.
• Warmy vs Apollo: Apollo offers more features overall. Warmy has deeper email deliverability tools and focus.
• Warmy vs Hunter: Hunter is better for finding emails. Warmy is better for making sure those emails actually land in inboxes.
• Warmy vs Reply IO: Reply IO excels at multichannel outreach. Warmy dominates in pure email warm up quality.
• Warmy vs UpLead: UpLead focuses on B2B data. Warmy focuses on email deliverability. Different tools for different needs.
• Warmy vs Mailshake: Mailshake is simpler for outreach. Warmy offers more advanced warming and deliverability testing.
• Warmy vs Lemlist: Lemlist is best for personalized campaigns. Warmy is best for inbox placement and domain reputation.
• Warmy vs Woodpecker: Both are solid for B2B email. Warmy has more AI-powered warming. Woodpecker has better sending features.
• Warmy vs Smartlead: Smartlead offers unlimited warm-up at flat-rate pricing. Warmy has better AI but costs more per inbox.
• Warmy vs Saleshandy: Saleshandy bundles warm-up with outreach. Warmy is the better pure warming tool.
• Warmy vs Klenty: Klenty is easier to learn. Warmy delivers more powerful warming with its Adeline AI engine.
• Warmy vs Warmbox: Warmbox is much cheaper. Warmy offers more features and 30+ language support.
• Warmy vs Maildoso: Maildoso focuses on sending infrastructure. Warmy focuses on warming and deliverability testing.
• Warmy vs Manyreach: Manyreach covers more channels. Warmy is the better dedicated email warm up service.

My Experience with Warmy

Here’s what actually happened when I used Warmy:

The project: I needed to warm up 5 new client domains for a cold email outreach campaign. Each domain was brand new with zero reputation.

Timeline: 60 days of continuous testing.

Results:

What surprised me: The speed of improvement. Within 3 weeks, I could already see my deliverability climbing. By week 6, most domains were landing above 85% in primary inboxes.

What frustrated me: Not gonna lie, the pricing caught me off guard when I tried to add all 5 domains. The per-inbox cost makes it hard for smaller companies to scale. I wish they offered a flat rate for multiple mailboxes.

Would I use it again? Yes — for 1-3 critical domains. For large-scale warming, I’d look at a flat-rate option.

Final Thoughts

Get Warmy if: You need the highest deliverability for a small number of critical inboxes and want a proven AI-powered solution.

Skip Warmy if: You manage many domains and need budget-friendly, flat-rate pricing to scale your warming.

My verdict: After 60 days of real use, Warmy earned its spot in my toolkit. The warm up process works. The support team is among the best I’ve experienced with any software. And the deliverability results are real.

Warmy is best for sales teams, marketers, and agencies who depend on email outreach. It’s a solid choice if inbox placement is crucial for your business.

Rating: 4.5/5

Frequently Asked Questions

Is Warmy safe to use?

Yes, Warmy is safe. It uses real email accounts to interact with your mailbox. The warm up process follows natural human patterns. Your data is protected by 256-bit SSL encryption. Thousands of companies trust it daily.

What does Warmy do?

Warmy is an email deliverability tool. It warms up your mailbox by sending and receiving emails from real accounts. This builds your sender reputation so your messages land in the inbox instead of the spam folder. It also tests your deliverability and checks your templates.

How does email warm up work?

Email warm up gradually increases your sending volume. Warmy sends messages from your account to real inboxes. Those emails get opened, replied to, and marked as important. Over time, email providers see your domain as trustworthy. This improves your inbox placement for real email campaigns.

How much does Warmy cost?

Warmy uses custom pricing in 2026. You need to contact their sales team for exact rates. Previously, plans started at $49/month for the starter plan. They offer a free 7-day trial with no credit card required. Book a demo to get your personalized pricing.

Is Warmy better than Instantly?

It depends on your needs. Warmy has a stronger AI engine for warming and better language support. Instantly is better for high-volume sending with unlimited accounts at a lower price. If warming is your main goal, go with Warmy. If you need a full cold email outreach platform, Instantly is the better pick.