Updated August 4, 20264,146 words15 tools compared
Email deliverability is one of the most overlooked factors in B2B outreach. When you're sending cold emails at scale, Internet Service Providers scrutinize your sending patterns closely—and one wrong move can land you in the spam folder. Email warm up software solves this problem by gradually building your sender reputation before you launch high-volume campaigns.
Unlike generic CRM solutions, dedicated warm up tools automate the process of establishing credibility with email providers. They interact with your mailbox in natural patterns, open and reply to emails, and systematically improve your domain authority over time. This article reviews 15 solutions ranging from specialized warm up platforms to CRM systems with built-in warm up capabilities, helping you choose the right tool for your team's size and outreach goals.
In-depth analysis of each platform to help you make the right choice.
#1
HubSpot Sales Hub
Top Pick
Best For: Growing sales teams (5-50 people) who want an all-in-one CRM with native email warm up capabilities
HubSpot Sales Hub combines email warm up with a complete sales engagement platform. It offers native email sequences that automatically increase your sending volume over time, protecting your domain reputation while you build relationships. The platform integrates with Gmail and Outlook, making it accessible for most sales teams. With email templates, tracking, and automation built in, it's a complete solution rather than a single-purpose tool.
Pricing: Free plan available; Pro starts at $50/month per seat; Enterprise pricing available
Key Features
Email sequences with gradual volume ramp-up
Email open and click tracking
CRM pipeline management
Gmail and Outlook integration
A/B testing for email templates
Pros
+Integrated approach means fewer tool subscriptions
+Clear email warm up logic built into sequences
+Excellent reporting on email engagement metrics
+Strong onboarding and documentation for new users
Cons
-Per-seat pricing gets expensive for larger teams
-Warm up features less granular than dedicated tools
-Setup requires some technical knowledge for advanced workflows
Verdict
HubSpot Sales Hub is the best option for teams already invested in the HubSpot ecosystem or those wanting a complete solution without multiple vendors. The warm up features integrate naturally with your outreach workflow, though it's not as specialized as dedicated warm up platforms.
#2
Zoho CRM
Best For: Bootstrapped startups and early-stage companies needing full CRM functionality with email warm up on a minimal budget
Zoho CRM provides email automation and warm up capabilities at a fraction of the cost of competitors. The platform includes email template builder, automated sequences, and domain reputation management features. For early-stage startups operating with tight budgets, Zoho delivers surprising depth—you get CRM, email automation, and customer support all in one affordable package.
Pricing: Free plan includes basic CRM; paid plans start at $18/month for up to 3 users
Key Features
Email automation workflows
Domain warm up scheduling
Lead scoring and qualification
Mobile-responsive email templates
Multi-channel communication tracking
Pros
+Most affordable option for full-featured CRM
+Competitive warm up features despite low cost
+Strong mobile app for remote teams
+Excellent customer support
Cons
-UI less polished than HubSpot or Salesforce
-Fewer integrations than larger platforms
-Learning curve for complex workflows
Verdict
Zoho CRM represents exceptional value for early-stage teams. While not as sleek as premium alternatives, the email warm up functionality is solid and the cost savings are substantial—making it ideal for founders bootstrapping their GTM efforts.
#3
Copper
Best For: Google Workspace customers who want minimal friction and prefer working within Gmail rather than a separate CRM interface
Copper is purpose-built for Google Workspace users and operates as a native Gmail extension. It brings CRM functionality into Gmail's interface, allowing you to track emails, manage deals, and execute warm up sequences without leaving your inbox. The tight Gmail integration eliminates friction—no switching between tabs or learning a new email client.
Pricing: Starter plan at $25/month per user; Pro at $65/month per user
Key Features
Native Gmail integration
Email tracking with read receipts
Automated follow-up sequences
Deal pipeline management
Contact enrichment data
Pros
+Works directly in Gmail inbox
+No email client switching required
+Fast implementation for Google Workspace teams
+Clean interface within Gmail
Cons
-Less suitable for Outlook users
-Limited customization compared to standalone CRM platforms
-Smaller integrations ecosystem
Verdict
Copper is the obvious choice for Google Workspace teams that want CRM without complexity. The native Gmail experience is superior to alternatives, and warm up sequences execute smoothly within your existing workflow.
#4
Streak
Best For: Teams wanting CRM-lite functionality within Gmail or Outlook without the complexity of standalone platforms
Streak functions as a CRM inside Gmail, positioning itself between lightweight email extensions and full CRM platforms. It allows you to build pipelines in Gmail, track emails, and execute automated sequences with warm up logic. Unlike Copper, Streak also supports Outlook, giving it broader appeal across different email providers.
Pricing: $50/month per user (Starter plan); $170/month per user for Power tier
Key Features
Email pipeline management
Automated email sequences
Recipient tracking and analytics
Native Gmail and Outlook integration
Custom fields and templates
Pros
+Works with both Gmail and Outlook
+Low-friction implementation
+Clean interface directly in email client
+Affordable for individual contributors
Cons
-Limited advanced CRM features compared to full platforms
-Less sophisticated warm up compared to dedicated tools
-Scaling features require higher pricing tiers
Verdict
Streak fills a niche for email-first teams that need more structure than basic email but less complexity than enterprise CRM. The warm up capabilities work well for small teams running limited campaigns, though it's not optimized for high-volume outreach.
#5
HubSpot Sequences
Best For: HubSpot customers who want dedicated email sequence tools with integrated warm up logic
HubSpot Sequences is the email automation component of the HubSpot platform, offering dedicated tools for building multi-touch outreach campaigns. It includes warm up logic, template building, and detailed engagement tracking. When combined with a HubSpot paid plan, Sequences provides serious email warm up capability without additional cost.
Pricing: Available free with HubSpot Free CRM; included with all paid tiers starting at $50/month
Key Features
Scheduled email sequences
Automatic warm up volume management
Bounce and unsubscribe handling
Template library with personalization
Engagement timing optimization
Pros
+Free with HubSpot Free CRM
+Sophisticated personalization options
+Strong warm up logic built in
+Native integration with HubSpot pipeline
Cons
-Requires HubSpot account to use
-Less specialized than dedicated warm up platforms
-Features depend on chosen HubSpot plan tier
Verdict
HubSpot Sequences is excellent for teams already using HubSpot. The warm up features are sophisticated, and the free tier makes it accessible for testing. However, it's not an independent tool—you're buying into the broader HubSpot ecosystem.
#6
Superhuman
Best For: Individual contributors and small teams working at high email volume who want intelligence and automation in their client itself
Superhuman is a premium AI-powered email client designed for high-volume email users. It includes AI-assisted email responses, scheduling, and integrated warm up capabilities. Rather than being a traditional CRM, Superhuman optimizes your personal email workflow with intelligence, automation, and warm up logic baked throughout the experience.
Pricing: $30/month per user; additional users at standard rate
Key Features
AI email composition assistance
Scheduled send with optimal timing
Email warm up integration
Advanced search and filtering
Read receipts and tracking
Pros
+Best-in-class email client experience
+AI assistance genuinely saves time
+Integrated warm up without separate configuration
+Mobile app with feature parity to desktop
Cons
-Per-user cost adds up quickly for large teams
-Not a full CRM—requires separate deal tracking
-Setup process notoriously difficult; requires manual invitation
Verdict
Superhuman excels for individual contributors and small teams wanting an intelligence layer on top of email. The warm up features are solid, but you'll need a separate CRM for deal pipeline management, making it better as a complement to—not replacement for—a full platform.
#7
Monday CRM
Best For: Teams that value customization and visual workflows, and prefer a platform that combines CRM with broader work management capabilities
Monday CRM layers customer relationship management on top of Monday's no-code work operating system. It includes email automation, template building, and warm up features within a highly customizable interface. Teams that prefer visual, customizable workflows over rigid CRM structures often prefer Monday's approach to email warm up.
Pricing: Starts at $99/month for the CRM module; pricing varies based on seat count and features
Key Features
Customizable deal pipelines
Email sequence automation
Workflow automation with warm up logic
Multi-user collaboration
Timeline and activity tracking
Pros
+Highly customizable workflows
+Visual pipeline management appeals to non-technical teams
+Strong automation capabilities
+Good integration ecosystem
Cons
-Pricing more expensive than traditional CRM tools
-Learning curve for advanced features
-Warm up features less specialized than dedicated tools
Verdict
Monday CRM works well for teams that already use Monday for project management and want to add CRM. The customization is powerful, but you're paying for flexibility—more traditional CRM features might be simpler and cheaper elsewhere.
#8
Aircall
Best For: Sales teams that rely heavily on phone outreach in addition to email and want unified communication tracking
Aircall positions itself as a phone and email platform, bridging voice and email communication. While email warm up isn't the primary focus, Aircall includes email tracking, sequences, and automation features. For sales teams that use phone outreach alongside email, Aircall's integrated approach eliminates switching between tools.
Pricing: $30/month per user (Starter); $60/month per user (Professional)
Key Features
Phone and email integration
Call recording and playback
Email sequence automation
Contact and activity tracking
IVR and voicemail
Pros
+Unified phone and email platform
+Phone-specific features are best-in-class
+Good team-wide reporting
+Strong for sales team coordination
Cons
-Email features secondary to phone capabilities
-Warm up logic less sophisticated than email-focused tools
-Less detailed email analytics than CRM platforms
Verdict
Aircall is the right choice if phone outreach is central to your strategy. Email warm up works fine, but it's not the platform's strength—it's better viewed as a phone platform with decent email capabilities than vice versa.
#9
Podio
Best For: Small teams and startups wanting extreme customization in their CRM and willing to spend time on setup
Podio is a no-code CRM and workflow platform that includes email automation capabilities. It's less popular than Monday or HubSpot but offers strong flexibility for teams wanting to build custom CRM workflows. Email warm up features are available but require more manual setup than plug-and-play alternatives.
Pricing: $12/month per user (Basic); higher tiers available with more functionality
Key Features
Custom CRM building
Email automation workflows
Task and activity management
Team collaboration tools
Mobile app access
Pros
+Most affordable CRM option at scale
+High customization potential
+Good for process-heavy teams
+Flexible enough to adapt as business grows
Cons
-Requires more hands-on setup than platforms like HubSpot
-Warm up features need configuration
-Smaller user base means less community support
Verdict
Podio is ideal for lean teams that want maximum customization at minimal cost. Setup requires more work, but once configured, it's a flexible foundation that can scale with your business.
#10
Slack Sales Elevate
Best For: Teams that live in Slack and want to avoid switching to separate CRM interfaces during the workday
Slack Sales Elevate brings sales tools directly into Slack, allowing teams to execute deals, send emails, and track activity without leaving the messaging platform. For Slack-native teams, this means no context switching—you manage deals and warm up sequences from your daily workflow.
Pricing: Free with Slack account (limited features); full capabilities included with Slack Pro or higher
Key Features
Deal management in Slack
Email sending from Slack
Activity and meeting tracking
AI-powered deal insights
Real-time team collaboration
Pros
+Zero context switching for Slack teams
+Built on collaboration platform your team already uses
+AI insights on deal health
+Minimal learning curve
Cons
-Limited CRM functionality compared to full platforms
-Warm up logic less sophisticated than dedicated tools
-Not suitable for teams not using Slack
Verdict
Slack Sales Elevate works exceptionally well for teams built around Slack. It's not a complete CRM replacement, but if you're Slack-first, it eliminates friction in your sales workflow—including basic email warm up.
#11
HubSpot Operations Hub
Best For: Growing companies needing sophisticated workflow automation alongside email warm up and process management
HubSpot Operations Hub focuses on process automation and workflow management, including sophisticated email automation with warm up capabilities. It's designed for growing teams needing to automate complex business processes beyond basic CRM functionality. While more expensive than basic HubSpot tiers, Operations Hub enables powerful automation.
+Email warm up integrates naturally into complex processes
+Strong reporting and insights
+Scales well as business grows
Cons
-Requires understanding of automation logic
-More complex than basic CRM tools
-Training needed for non-technical teams
Verdict
Operations Hub is excellent for mid-stage companies automating complex sales processes. Email warm up is well-integrated, but you're paying for sophisticated process automation—simpler teams might not need all the capabilities.
#12
Salesforce Essentials
Best For: Teams that want Salesforce reliability and integration ecosystem without enterprise-level complexity and cost
Salesforce Essentials is Salesforce's entry-level CRM offering, designed for small teams. It includes basic email automation and warm up functionality. While Salesforce traditionally appeals to enterprise buyers, Essentials brings its power to smaller teams with simpler pricing and implementation.
Salesforce Essentials makes sense if you're certain your company will scale and want to be on Salesforce before growth makes migration difficult. For pure email warm up functionality, it's overpriced—but as a long-term foundation, it works well.
#13
Verifone CRM
Best For: Retail and hospitality businesses managing customer relationships and local promotions
Verifone CRM is tailored for retail and hospitality businesses, making it a specialized option rather than a general-purpose platform. Email warm up features are included but designed for customer communication in those specific verticals rather than B2B outreach.
Pricing: Custom pricing based on implementation and team size
Key Features
Point-of-sale integration
Customer data management
Email marketing for retail
Loyalty program tracking
In-store and online integration
Pros
+Industry-specific features for retail/hospitality
+Point-of-sale integration
+Strong for customer communication
+Unified customer view
Cons
-Not designed for B2B outreach
-Limited warm up features for cold email
-Custom pricing makes budgeting difficult
Verdict
Verifone CRM is the wrong tool for B2B email outreach. It's excellent for its intended purpose (retail/hospitality customer management), but email warm up features aren't optimized for B2B cold email campaigns.
#14
Klaviyo
Best For: E-commerce and e-commerce SaaS teams managing customer email at scale with sophisticated segmentation
Klaviyo specializes in e-commerce email marketing with advanced segmentation and automation. While not designed for B2B cold outreach, it includes email warm up logic and sophisticated automation. For e-commerce teams managing customer communications at scale, Klaviyo's warm up features ensure deliverability.
Pricing: $20/month (Starter); scales with list size and features
Key Features
Advanced email segmentation
Behavioral automation triggers
List management and hygiene
A/B testing
Integration with e-commerce platforms
Pros
+Excellent segmentation and targeting
+Email warm up logic for scale
+Strong template builder
+Good for customer retention campaigns
Cons
-Not designed for cold outreach
-Warm up features less sophisticated than B2B tools
-List size-based pricing can get expensive
Verdict
Klaviyo is wrong for B2B cold email but excellent for e-commerce customer communication. If you're managing customer retention emails at scale, the warm up features ensure inbox delivery—but for B2B prospecting, look elsewhere.
#15
Notion CRM
Best For: Teams already using Notion for internal processes who want to extend it to CRM without adopting new software
Notion CRM is a customizable database-based approach to customer relationship management. It appeals to teams that prefer building solutions in Notion over adopting traditional CRM software. Email integration is available through third-party tools, making warm up features less native than alternatives.
Pricing: $10/month (Notion Pro plan); includes CRM templates and databases
Key Features
Customizable databases
Relation management
Task and timeline views
Integration with external email tools
Template library
Pros
+Extreme flexibility in design
+Low cost for team already using Notion
+Good for process documentation
+Minimalist interface
Cons
-Email warm up requires separate integration
-Lacks native email automation
-Not optimized for sales workflows
-Requires manual configuration
Verdict
Notion CRM is a solid choice only if you're deeply committed to Notion as your primary tool. Email warm up requires additional integrations, making it less efficient than dedicated platforms—but for Notion-first teams, it's cost-effective.
Frequently Asked Questions about email warm up software
Email warm up software gradually builds your sender reputation by mimicking natural email behavior before you launch high-volume campaigns. ISPs like Gmail, Outlook, and Yahoo monitor sending patterns—if you suddenly send 100+ emails daily from a new domain, spam filters flag it as suspicious. Warm up tools solve this by slowly increasing your send volume while generating legitimate engagement (opens, clicks, replies) on your emails. This establishes credibility with ISPs, improving your deliverability rate when you scale outreach. Without warm up, cold email campaigns often land in spam, destroying ROI. Most B2B outreach platforms include some warm up logic, though dedicated warm up tools offer more granular control over ramp-up schedules and engagement patterns.
Most warm up processes take 7-14 days to establish basic reputation, though optimal results come after 30-60 days of consistent activity. The exact timeline depends on your sending volume goal and domain history. New domains require longer warm up than established ones. During this period, warm up software gradually increases your daily send volume—typically starting at 10-20 emails per day and adding 20-30 more daily until you reach your target volume. The process isn't strictly sequential; you can start light outreach (50-100 emails) after 7 days while continuing warm up in the background. However, most experienced operators wait the full 30 days before ramping to maximum volume. RevAlign.io can help you develop a custom warm up timeline based on your specific domain history and outreach goals.
Warm up works differently across email providers. Custom domains (your-company.com) are ideal and highly recommended for professional outreach—these build the most valuable reputation. However, many warm up tools support Gmail, Outlook, and other providers, though with limitations. Gmail and Outlook have strict sending limits (hundreds of emails per day maximum) compared to custom domains (thousands possible). Additionally, warm up features on consumer accounts are less sophisticated since they lack domain-level reputation controls. For serious B2B outreach, always use a custom domain with proper SPF, DKIM, and DMARC records configured. Consumer email accounts work for very small-scale outreach or testing, but warm up tools optimize for domains rather than consumer accounts.
You technically can warm up manually by carefully ramping send volume in your CRM's email sequences, but dedicated warm up software handles the process much more efficiently. Manual warm up requires constant monitoring and adjustment of send volumes to maintain natural patterns—time-consuming and error-prone. Dedicated tools automate this entirely: they track your sender reputation, adjust volume based on engagement metrics, and prevent you from ramping too fast (which triggers spam filters). Some email platforms like HubSpot and Zoho include warm up logic in their native sequences, which works well if that's where you're already sending from. However, if you're serious about high-volume outreach, dedicated warm up tools provide better control and faster reputation building. The ROI difference between manual and automated warm up becomes clear after the first month: automated warm up typically results in 15-25% higher deliverability rates simply because the algorithm adjusts patterns continuously based on real ISP feedback.
Conclusion
Email warm up software is essential infrastructure for any B2B outreach program, but the right tool depends heavily on your team size, existing platform stack, and sending volume. For all-in-one buyers, HubSpot Sales Hub and Zoho CRM offer integrated warm up that doesn't require additional tools. If you're Gmail-first, Copper delivers native integration with minimal friction. For teams needing specialized warm up logic, platforms like Superhuman or dedicated solutions go deeper into sender reputation management.
The key insight: avoid switching between tools. Your warm up software should integrate naturally with your CRM, email client, or outreach platform—not exist as a separate system you have to manage separately. Most modern platforms include warm up logic, so the decision often hinges on other features rather than warm up specifically. However, if warm up is your primary concern and deliverability your primary challenge, more specialized tools typically provide better results.
Start with a free option (HubSpot Sequences, Zoho, or Podio) to test the concept, then upgrade to a paid tier once you understand your team's outreach patterns. Remember that warm up alone doesn't guarantee success—it just ensures your well-written emails reach inboxes instead of spam folders. Pair your warm up software with strong email templates, list quality, and personalization for maximum impact. For help implementing warm up strategy across your entire GTM process, RevAlign.io offers strategic guidance on platform selection and warm up sequencing.
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