15 Email Warm-Up Tools Reviewed: Which One Delivers the Best Results?
If you’re in sales, then email is probably one of your primary outbound tools. So, what happens when your researched, well-crafted outbound email ends up in someone’s spam folder?
Nothing – no lead, no sale. Not a good way to build a customer base.
Email warm-up tools address this issue by increasing email volume, simulating engagement, and providing analytics. This process builds domain reputation and ensures your emails land in prospects' inboxes.
In this article, we’ll discuss the tactics behind email warm-ups and our top 15 platforms offering dedicated or integrated warm-up features.
Why Email Warm-Up is Important for Cold Email Campaigns
Cold emails compete with a tidal wave of emails from other salespeople, scammers, and spammers. Because of this, many cold emails get sent directly to a recipient’s spam filters.
This reflects decreasing email deliverability across all industries—in 2023, it was only 83%. That means that recipients never saw 17% of emails.
As the name suggests, email warm-up takes your cold emails and makes them “warm” or more likely to land in a prospect’s inbox. The process involves sending a few emails to trusted, high-quality email accounts that will interact with them, raising the reputation of your domain so that when you send genuine emails to real prospects, they are much less likely to land in a spam folder.
Email warm-ups:
Avoid spam filters by building up your (trustworthy) sending habits with email service providers. If you just start spamming cold emails, these providers will (clearly) see your emails as spam. Email warm-ups avoid that problem.
Build a reputation with service providers. These providers all use a “domain reputation” score that helps them understand if an email is legitimate or from a known spam account.
Reduce bounce rates and blacklisting associated with poor sending habits. Email warm-ups gradually scale how many emails your account sends and allow you to determine if you’re getting a lot of bounce backs from bad addresses, which can impact your domain reputation.
Increase deliverability and engagement rates due to emails landing in actual inboxes. Since your emails don’t land in the spam filter, more people see them… which means better engagement, better response rates, and a better domain reputation.
Warm up emails using automated tools or manually by gradually increasing sent and received email volume. For manual warm-ups, consider subscribing to relevant industry newsletters.
On the technical side, you can also ensure you have legitimate DomainKeys Identified Mail (DKIM) and Domain-based Message Authentication Reporting and Conformance (DMARC) profiles that signal to email providers that you aren’t a spammer.
15 Best Email Warm-Up Tools for Better Deliverability
Key Features | Pricing | |
Artisan | End-to-end sales pipeline management AI SDR, Ava for automation Inbox analysis for domain and mailbox health Topic-specific warm-ups with human interactions Automatic spam removal | Contact support for pricing details. |
Saleshandy | Automated warm-up with custom scheduling Domain rotation Email engagement tracking Integrates with email platforms and CRM | Outreach Starter: $25/month Outreach Pro: $74/month Outreach Scale: $149/month Outreach Scale Plus: $219/month |
Lemwarm | AI-driven warm-up Reputation monitoring Dashboard with detailed reporting Built-in integrations with Lemlist Free deliverability testing | Lemwarm standalone: $24/month per inbox Smart Plan: $40/month per email Free with Lemlist subscription |
Mailwarm | Peer-to-peer email warm-ups Human review SMTP integrations Unlimited mailboxes at higher tier | Basic: $90/month for 50 email inbox warm-ups Pro: $190/month for unlimited inbox warm-ups |
QuickMail | Deliverability AI for domain reputation Automated warm-up Instant reporting on domains Domain rotation | Included with Pro Plan: $89/month Expert Plan: $129/month |
Note: Features and pricing are subject to change. Always check the provider's website for the most up-to-date information.
1. Artisan
Artisan is an end-to-end sales pipeline management and prospecting solution with deep automation features and a brilliant, always-on AI SDR, Ava. Alongside a highly flexible and scalable email campaign builder, several tools for personalizing emails, and AI-supported copywriting and data management, we also include robust email warm-up services.
With Artisan, you’ll get these warm-up features alongside all our industry-leading prospecting services.
Features include:
Inbox analysis to determine your domain’s age, mailbox age, and sender reputation. This information is used to build out specialized warm-up strategies for your campaign.
Topic-specific warm-ups backed by real, human interactions guarantee a high sender reputation.
Automatic spam removal as part of the warm-up process.
Integration with AI-powered SDR, Ava, for end-to-end sales pipeline management
Pricing
Contact Artisan for a customized quote based on your business needs and scale.
Pros
AI-driven with highly realistic engagement simulations.
Offers customizable warm-up campaigns for tailored strategies.
Provides comprehensive monitoring of inbox placement and domain reputation.
Cons
Artisan may have a steeper learning curve for beginners.
Customer Reviews
“A game changer to our business development needs… We’ve booked ten sales calls in about two months of using Artisan.” -Julio M.
Combine a deep B2B database, industry-leading prospecting and outbound sales tools, and our AI-driven SDR. Try Artisan and Ava Now
2. Saleshandy
Saleshandy is a robust email solution that focuses on two things: warmup and campaign automation. Users will enjoy key features like domain rotation and automated email follow-ups within this framework.
This doesn’t mean that the platform is comprehensive—if you decide to go with Saleshandy, you’ll most likely want to integrate features into your existing email platform or CRM.
Key features include:
Automated warm-up that starts with low-volume emailing and ramps up over time. You can also use custom scheduling to meet specific sending needs.
Sender rotation helps you avoid your emails becoming spam or caught up in other filters.
Email engagement tracking to help you see how recipients engage through open and click-through metrics.
Pricing
Outreach Starter: $25 monthly includes start versions of all their services.
Outreach Pro: $74 monthly includes Pro versions of all their services.
Outreach Scale: $149 monthly, including unlimited team access and white-label agency services.
Outreach Scale Plus: $219 monthly includes custom prospecting limits and a dedicated success manager for your account.
Pros
Customizable warm-up plans for different email providers.
Several sales platform integrations, including Salesforce, HubSpot, and Zoho.
Detailed analytics for tracking progress.
Cons
Direct integrations are limited, with the rest relying on Zapier as middleware.
Customer Reviews
“I’ve been using SalesHandy for the past 8 months, and I love that I can pause and resume my campaigns at any time.” -Dishant P.
3. Lemwarm
Lemwarm, from Lemlist, is a warm-up tool tied to the core line of Lemlist cold outreach services. Their warm-up services include a network of 10,000 qualified users to raise domain reputation and ongoing reputation monitoring to help provide insights on maintaining and improving deliverability.
Key features include:
A Lemwarm dashboard that provides detailed reporting on your reputation score and intelligence regarding emails sent and delivered.
Built-in integrations with all Lemlist products, including email customization and campaign development.
Free deliverability testing includes a score, technical setup check, and content audit.
Pricing
Lemwarm is a standalone product that costs $24 monthly per inbox and $40 monthly per email for the Smart Plan.
All paid Lemlist members for plans like Email Pro, Multichannel Expert, or Outreach Scale get a free Lemwarm seat. Upgrading to a higher Lemwarm Smart tier will include a discount factored into your monthly subscription.
Pros
Integrated with Lemlist’s cold outreach platform.
Fully automated and hands-off process.
Excellent inbox placement optimization.
Free deliverability testing.
Cons
Only available with a Lemlist subscription.
The pricing can be higher compared to standalone warm-up tools.
Customer Reviews
“We had already been using lemlist as our leading Cold Email automation software, so we decided to give lemwarm a shot, given that it was included in the price, and we already trusted the lemlist team for their technical expertise.” -Bill Stathopoulos.
4. Mailwarm
Mailwarm focuses on scaling email volume to create a good reputation score for your domain. In addition, their website doesn’t provide many details about their services. It does boast peer-to-peer email warm-ups and “human review” but doesn’t list anything else outside of SMTP integrations.
Features listed include:
Peer-to-peer email warm-ups.
Human review of emails to guarantee a rising reputation and deliverability scores.
Unlimited mailboxes at a higher price point.
Pricing
Basic: $90 monthly for 50 email inbox warmups and 40 daily emails.
Pro: $190 monthly for unlimited inbox warmups and 80 daily emails.
Pros
Uses real user interactions, which is more authentic than purely automated systems.
Easy to set up and customizable.
Cons
Relatively expensive compared to competitors.
Fewer features outside of warm-up services (no CRM or email marketing tools).
A limited set of features that aren’t well-defined on the main site.
Customer Reviews
“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 delivere, and our domain would have been hurt.” -Verified G2 User.
5. QuickMail
Quickmail is another email campaign manager that includes some warm-up capabilities. Their “Deliverability AI” helps salespeople improve their domain reputation with insights you can’t get from manual warm-up tools. This includes rotating domains and strategically using inboxes with high reputation scores for priority accounts.
Features include:
Deliverability AI, applying AI insights and automation to warm-up to increase domain reputation and deliverability.
Instant reporting on domains, including deliverability score and whether or not they’ve been blacklisted.
Price
Deliverability AI is included with the Quickmail Pro Plan ($89/mo) and Expert Plan ($129/mo).
Pros
Fully automated and simple to use.
Supports multiple inboxes for scaling campaigns.
Affordable for smaller teams.
Cons
Limited to basic warm-up features compared to more advanced tools.
Fewer customization options for warm-up engagement.
Customer Reviews
“It's damn easy to set up, user-friendly, no fluff, and faster to get started.” -Him S.
6. MailReach
MailReach is a dedicated warm-up tool that supports both warm-up and spam testing. Their primary website claims a simple process: connecting to email accounts with good reputations, where your emails are marked as important and removed from spam. MailReach will then track your reputation and can connect via email or Slack to update you on your deliverability.
Features include:
Dedicated email warm-up using standard methods of ramped-up email delivery to high-quality accounts that use human-like engagement to improve domain reputation.
Email Spam Test that lets you see if emails from specific domains are landing in spam folders (includes a free spam test for initial users.
Pricing
Pricing is based on a mailbox system, starting at $25 monthly per mailbox and dropping to $16 monthly once you reach 50.
The Spam Test pricing works on a credit system that starts with 20 free credits and can get as high as $160 monthly for 2,000+ credits.
Pros
Detailed insights into deliverability and reputation.
Easy to set up with most integrations, including Outlook, HubSpot, and others.
Easy-to-track account health through a simple dashboard.
Cons
More expensive than some competitors, especially if you need more mailboxes or licensed users.
Features limited to warm-ups.
Customer Reviews
“This software is a simple solution to avoid getting your company's meaningful emails to receivers without being lost in the whirlwind of spam.” -Felix B.
7. Snov.io
Snov.io is, first and foremost, an email prospecting tool that includes several warm-up features, making it a potential choice for those who want an all-in-one solution. They also have a dedicated Gmail email tracker to help customers discover the habits of their recipients, including a long list of tools that many other providers don’t seem to offer.
Features include:
Email deliverability tests that help users see if their emails are landing in the spam folder and provide insights on how to improve deliverability.
Warm-up tools that include mailbox rotation, AI-curated warmup, and email verification.
AI-powered suggestions that help you avoid language that flags spam filters.
Prices
Pricing tiers are broken up based on credits (for prospecting and verification), mailbox warm-ups, and email volume limitations.
Trial: Free, with 50 credits and one mailbox warm-up.
Starter: $30 monthly for three mailbox warmups and 1,000 credits.
Pro: Scalable, starting at $75 monthly, for unlimited mailbox warm-ups, 5,000 credits, and advanced email tools for testing and personalization.
Pros
Comprehensive tools for email prospecting, outreach, and warm-up.
Relatively affordable for features offered, and pricing scales reasonably based on organization size.
Cons
Warm-up features are basic compared to specialized tools from other providers.
Some users find the interface complex and counterintuitive when using the full suite of features.
Customer Reviews
“One thing to note is the 40-character minimum for certain fields, which can sometimes be a bit restrictive. However, overall, it’s a minor inconvenience compared to the incredible value the platform provides.” -Steven P.
8. Folderly
Folderly is one of the more robust “dedicated” warm-up platforms we’ve seen. It includes the potential for customized warm-up plans and layers of solutions that can catch triggers for poor deliverability. Some are more predictable (scale-based warm-up campaigns) and unique (AI-driven content suggestions and the Inbox Insights application).
Features include:
Folderly, the primary domain reputation tools. This includes a clear picture of domain help, deliverability, and insights on potential spam triggers in your emails.
Inbox Insights, a specialty tool that helps you better understand how your emails end up in recipient inboxes. This includes email placement reports, automated tests, and domain health metrics.
Pulse, a monitoring tool that gives you nearly real-time information on problems with deliverability that syncs to Slack, SMS, or email.
Pricing
There are different pricing tiers for both Folderly and Inbox Insights:
Folderly
1-9 mailboxes: $96 per mailbox monthly
10-24 mailboxes: $72 per mailbox monthly
25-99 mailboxes: $56 per mailbox monthly
100+ mailboxes: Quote-based pricing
Inbox Insights
Free Tier with two tests per month
Unlimited tests for $79 monthly ($64 monthly if you pay for a year upfront).
Pros
In-depth email deliverability analytics and auditing tools.
AI-based solution with automated, human-like engagement.
Clear differentiation of products and features to support complex email campaigns.
Cons
Monthly licensing can get pricey for the full collection of products.
Some users may not need the extensive auditing features.
Customer Reviews
“The most impactful change since using Folderly has been our email deliverability rate. It has increased from 45% to an amazing 97% and is still improving.” -Anastasiia V.
9. Reply
Reply.io is a bit of a mixed toolbox, including AI SDR capabilities, AI chatbots, and its “Deliverability Toolkit.” While its focus seems tailored for outbound sales, it’s also just as clearly invested in its warm-up features (particularly for Gmail users).
Features include:
The Deliverability Toolkit, boasting 20+ warm-up and delivery support features, including automation, warm-up profiles, AI content suggestions, and reputation monitoring.
Extensive Gmail API integration will help reduce the risks of landing in spam.
Access to deliverability experts who can provide suggestions based on your specific campaigns.
Pricing
Warm-up services are included in all of Reply’s sales engagement packages:
Email Volume Tier: Starting at $29 monthly for 1,000 active contacts.
Multichannel: Starting at $53 per user monthly for unlimited email warm-ups.
Agency: Starts at $166 monthly.
Pros
Warm-up tools are part of a comprehensive suite of apps for cold email outreach.
AI optimization helps with email warm-ups and content writing to avoid spam filters.
Excellent support for customers who need hands-on help.
Cons
Warm-up tools are limited in customization compared to dedicated platforms, even if they are robust compared to other complementary solutions.
Pricing can be high for smaller teams.
Customer Reviews
“The platform’s user-friendly interface makes it simple to set up personalized campaigns… Sometimes, the email deliverability can be affected, and it requires a bit of manual work to optimize for better inbox placement.” -John R.
10. Smartlead.ai
With support for multiple inboxes and a focus on improving deliverability,Smartlead.ai is great for businesses looking to scale their outreach efforts without worrying about ending up in the spam folder. Tying their warm-up service to their existing prospecting plans means you’ll only get the most value from this tool if you use it throughout your email sales pipeline.
Features include:
Unlimited email warm-ups, rotating inbox functionality, and other foundational warm-up tools.
Rotating IP addresses for each campaign using pre-warmed IPs.
Automated Email Service Provider Matching (ESP Matching) that matches your provider with that of the prospect to improve deliverability.
Pricing
Email warm-ups are included in large email and prospecting plans:
Basic Plan: $39 monthly
Pro Plan: $93 monthly
Custom Plan: Starting at $174 monthly
Pros
Scales well for agencies who buy into more extensive prospecting plans.
Customized plans can fit well into agency budgets.
Cons
Lacks detailed deliverability analytics.
More of an accessory feature for their larger outreach services.
Customer Reviews
“The platform is crazy easy to use, and implementing is a no-brainer - there is so much support via the team and online content through the web.’ -Danyal M.
11. Warmy
Warmy is another fully featured and dedicated warm-up tool that boasts full automation, AI-powered warm-up (via their artificial agent, “Adeline”), and placement checkers to determine how your emails land in inboxes. This platform also integrates deeply with most platforms, including one you’re most likely using now (Salesforce, Asana, Shopify, etc.).
Features include:
A suite of deliverability and warm-up tools, including a seed list, helps you pre-warm your email campaigns with high-quality engagement.
Several free tools, including an email deliverability test, an email template checker, and a calculator that helps you estimate how many domains you should have per mailbox (and how many emails to send).
A powerful API that allows you to connect Warmly deliverability tools to your website or app.
Pricing
Pricing tiers are based on how many emails you send per month, how many warm-up emails you’ll send per day, and how many monthly tests you need:
Starter: $49 monthly per mailbox
Business: $129 monthly per mailbox
Premium: $189 monthly per mailbox (includes Google Postmaster Integration)
Expert: $279 monthly per mailbox (includes Google Postmaster Integration)
Platinum: $429 monthly per mailbox (includes Google Postmaster Integration)
Pros
Fully automated warm-up with minimal setup regardless of email providers.
Detailed health monitoring for email reputation, spam filtering, security records, and more.
Cons
Higher tiers can be prohibitively expensive for small and mid-size businesses.
Integrates well with other platforms but requires that integration to do anything outside of warm-ups.
Customer Reviews
“I use Warmy for reaching out to potential collaborators and clients. It’s super easy to use, even for someone with no technical background. It really boosted the success of my outreach.” -Shirley J.
12. Warmup Inbox
Warmup Inbox is an automated, dedicated tool offering several paid and free tools. Its primary focus is the large network of high-quality inboxes to ensure your domain or IP isn’t doomed to the spam folder. It also offers several, useful free tools including content suggestions, a spam checker, and a DMAC creator.
Features include:
A network of 20,000 changing inboxes to support warm-ups and provide human engagement like opening, sharing, and forwarding.
A free email spam checker that determines whether or not your emails will land in a spam folder based on the email provider.
A free DMARC generator to help with email security and reputation score improvement.
Pricing
Basic Plan: $15 monthly per inbox, provides 75 daily warm-up messages.
Pro Plan: $49 monthly per inbox with 250 daily messages and specific ESP warm-ups.
Max Plan: $79 monthly per inbox with 1,000 daily messages and premium customer support.
Pros
Fully automated warm-ups with minimal manual setup required.
Supports multiple email accounts for warming up simultaneously.
Cons
Lacks some advanced features offered by more expensive tools.
The interface may be a bit basic for users looking for more comprehensive email marketing features.
Customer Reviews
“Warmup Inbox does exactly what they say they will do. They increase your email reputation scores on Google, Outlook and other providers.” -Ralph K.
13. Warmbox
Warmbox is another dedicated email warming service whose unique selling point is its support for a substantial list of integrated platforms, including Outlook, Gmail, iCloud, Yahoo!, and others. Its warmup dashboard also includes several customizable strategies for building your domain’s reputation.
Features include:
ESP-specific solutions covering nearly every major email and CRM provider.
Customizable warm-up strategies (called “recipes”) leveraging human interactions across a 35,000 inbox network to build deliverability.
Millions of templates claiming to make emails more natural and less likely to trigger spam filters.
Pricing
Solo Plan: $15 monthly for one inbox and 50 emails per day.
Start-Up Plan: $69 monthly for three inboxes and 250 emails per day.
Growth Plan: $139 monthly for six inboxes and 500 emails per day.
Team Plan: Customizable.
Pros
User-friendly with minimal setup required and a clean web interface for accessing mail.
Boasts an extensive network of inboxes to speed up email warm-ups.
Supports customization to match specific email-sending patterns.
Cons
Primarily focuses on warm-up services without additional outreach tools.
Advanced features may come at a higher price than basic warm-up tools.
Customer Reviews
“Warmbox helped us to reach out to more prospects, and to fix our spam issues (more than 50% of our emails didn't make it to the inbox before using the tool).” -Marc Connor
“I used it for 2 months, and there were no improvements. Then Google started blocking the emails. I stopped using it, and then I tried customer support—no reply.” -Vadim.
14. Success.ai
Success.ai is a robust email outreach platform that includes lead generation, AI writing, and (more relevant to this article) unlimited warm-up services. These services rely on their own internal network of inboxes and engagement patterns to ensure high deliverability.
Features include:
Organic warm-up that scales slowly day after day in an automated process.
Integration with the Success.ai platform and one-click activation with your integrated email accounts.
A live “warm-up dashboard” that helps you track warm-up and reputation scores, spam score, and inbox placements.
Pricing
Unlimited warm-up services are included with every Success.ai email plan, starting at $16.50 monthly.
Pros
Scalable solution for businesses managing multiple domains.
AI-powered with automated and customizable warm-up processes.
Offers detailed analytics to monitor progress and performance.
Cons
Relatively new in the market, so user experiences and reviews are limited.
May lack some advanced features found in more established tools.
Customer Reviews
“The platform empowers my email campaigns with advanced tools and features, improving the impact of each campaign… Not tech-savvy users may find the reporting tools complex to navigate.” -George G.
15. Mailivery
Mailivery is a solid choice for email warm-up, in no small part because it can connect directly to most email providers without the need for middleware or CRM platforms—without sacrificing other features like automation or analytics.
Features include:
AI-driven warm-ups, where intelligent systems mimic human interactions to boost the reputation of your domain.
Direct integration with nearly every major ESP on the market, including SMTP connection.
Pricing
Free Forever Plan: $0 for one inbox and ten daily emails.
Starters: $29 monthly for unlimited email accounts and up to 100 emails per day.
Professional: $79 monthly for unlimited email accounts and 600 emails per day.
Business: $199 for unlimited email accounts and 2,000 emails per day.
Pros
AI-based systems ensure realistic engagement and improved inbox placement.
Personalization features enhance the authenticity of interactions.
Provides comprehensive analytics for tracking warm-up effectiveness.
Cons
Higher pricing compared to some other warm-up tools.
Primarily focuses on warm-up without broader email marketing or outreach functionalities.
Customer Reviews
“Email warming seems limited to Gmail and not many other popular services. I also noticed that it appears when my email is added to be warmed, it is also used to warm others' email accounts, which I wasn't aware of how it works.” -Sean B.
Frequently Asked Questions
1. How do I know when my email account is fully warmed up and ready for large-scale campaigns?
The best way to determine if your email campaign is warmed up is to keep tabs on crucial engagement and deliverability metrics. Some of these include:
Improving deliverability rates signal that emails are landing in your recipients’ primary inboxes.
Reduced bounce rates due to carefully curated email lists.
Positive engagement indicators like open rates, forwards, clicked links, and subscriptions.
2. What should I do if my emails are still going to spam after using a warm-up tool?
Email warm-ups aren’t foolproof. If you’re finding that your emails are still landing in spam folders, there are a few steps you can take to try and right the ship:
Review your email content for any spam filter triggers you can think of. This can include all-caps subject lines, overuse of spammy sales language (demands to buy, promises of free products or services), or emails full of irrelevant links.
Revisit your warm-up process and precisely how you increased your email volume. You may have tried to send too many emails too quickly, damaging your reputation.
Check your domain reputation with tools like Google Postmaster or MXToolbox.
If issues persist, consult email deliverability experts or your warm-up tool's support team for personalized advice.
3. Are there any free email warm-up tools available, and how do they compare to paid options?
There are a few notable free tools:
Leadwarm.ai provides free warmup services for a single email, including analytics and AI options for creating emails. Scaling is slow, however, and you can only send up to 10 emails on your first day, with an increase of 1 email per day following that.
Snov.io offers a free tier with basic warm-up capabilities for a single inbox.
Mailivery also offers a “free forever” plan for users who want basic warm-up tools.
These free tools only have a fraction of the features or email volume you’ll need to do serious sales and warm-up work.
Boost Your Email Campaigns with the Right Warm-Up Tool
If you’re looking for a single-purpose email warm-up solution, you can’t really go wrong with Folderly. It’s a clearly defined set of tools that gives you everything you need for email warm-up.
For a comprehensive solution, consider Artisan. It combines a robust B2B lead database, automated prospecting tools, and an AI SDR (Ava) with practical warm-up tools, optimizing your sales pipeline and email deliverability.
Looking to combine a powerful sales pipeline platform with integrated email warm-up features? Try Artisan and Ava Now
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