NuReply vs Warmbox: Cold Email Platform vs Email Warmup Tool Comparison
Compare NuReply (cold email platform) and Warmbox (email warmup tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
NuReply is a cold email platform built for sending outbound campaigns that land in the inbox and generate replies, priced from $25/mo. Warmbox is an email warmup tool focused on sender reputation and inbox placement, priced from $19/mo. They cover different parts of the outbound workflow, so many teams run both together.
Key takeaways
- NuReply's entry Starter plan costs $25/mo and includes 10,000 contacts, 500 AI credits, 30,000 monthly emails, and 50 email accounts.
- Warmbox's entry Solo plan costs $19/mo and includes 1 inbox warm-up, 1 team member, and 50 emails per day.
- NuReply offers 6 pricing tiers ranging from $25/mo to $400/mo, while Warmbox offers 4 tiers ranging from $19/mo to $159/mo plus a custom Enterprise plan.
- NuReply lists features such as Unlimited Warm-up, Unlimited Sequences, Cold Email Writer, Sentiment Analysis, and ESP Routing.
- Warmbox lists features such as spam score monitoring, blacklist checks, DNS checker for SPF, DKIM, and DMARC, and multi-inbox support within a single account.
- Both platforms integrate with Gmail, Outlook, and SMTP, while NuReply also integrates with HubSpot and Zapier, and Warmbox also integrates with Google Workspace, Microsoft 365, Yahoo Mail, Amazon SES, and Zoho Mail.
Reviewed and updated September 5, 2026
NuReply vs Warmbox: Cold Email Platform vs Email Warmup Tool Comparison
Sales teams building an outbound stack often weigh NuReply, a cold email platform for cold email outreach, against Warmbox, an email warmup tool for email domain warming and deliverability. They cover different parts of the workflow, so this comparison covers what each one does, what each one costs, and where they overlap.
The Quick Answer
NuReply is a cold email platform for cold email outreach; Warmbox is an email warmup tool for email domain warming and deliverability. By each vendor's own wording, NuReply lists unlimited warm-up and unlimited sequences, and Warmbox lists automated email warmup with ai-powered interactions and customizable warmup recipes and strategies.
Warmbox offers a lower entry point at $19/mo compared to NuReply at $25/mo.
If your priority is sending campaigns that land in the inbox and generate replies, NuReply is the one built for it; for building sender reputation and improving inbox placement, that is Warmbox. Many teams run one of each.
Understanding the Core Difference
NuReply is AI cold email outreach platform that personalizes each email with AI, warms up sender reputation and runs multi-step campaigns across many connected sending accounts. Plans are metered by email accounts, AI credits, stored contacts and monthly email volume. Operated by DuoCircle LLC.
Warmbox is AI-powered email warmup tool that automates inbox warming with customizable recipes, spam score monitoring, and detailed analytics dashboards to improve cold email deliverability.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Solo
NuReply Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $25/mo | 10,000 contacts; 500 AI credits | 30,000 monthly emails; 50 email accounts |
| Launch | $50/mo | 25,000 contacts; 1,200 AI credits | 80,000 monthly emails; 100 email accounts |
| Growth | $100/mo | 50,000 contacts; 3,000 AI credits | 160,000 monthly emails; 250 email accounts |
| Scale | $200/mo | 100,000 contacts; 5,000 AI credits | 350,000 monthly emails; 500 email accounts |
| Pro | $300/mo | 175,000 contacts; 7,000 AI credits | 700,000 monthly emails; 800 email accounts |
| Enterprise | $400/mo | 250,000 contacts; 9,000 AI credits | 1,000,000 monthly emails; 1,500 email accounts |
Source: NuReply Pricing
Warmbox Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Solo | $19/mo | 1 inbox warm-up; 1 team member | 50 emails/day |
| Start-up | $79/mo | 3 inbox warm-up; 3 team members | 250 emails/day |
| Growth | $159/mo | 6 inbox warm-up | 500 emails/day |
| Enterprise | Contact Sales | custom | custom |
Source: Warmbox Pricing
Pricing Analysis
Warmbox offers the lower entry point ($19/mo vs $25/mo). Teams watching their budget will appreciate the savings, especially when starting out.
NuReply offers 6 pricing tiers compared to Warmbox's 4, giving you more granularity as you scale.
Features Breakdown
- Unlimited Warm-up
- Unlimited Sequences
- Cold Email Writer
- Sentiment Analysis
- Multi-Variant Testing
- ESP Routing
- and 2 more listed below
- Automated email warmup with AI-powered interactions
- Customizable warmup recipes and strategies
- Spam score monitoring and blacklist checks
- Real-time analytics and reporting dashboard
- DNS checker (SPF, DKIM, DMARC)
- Multi-inbox support within a single account
- and 2 more listed below
NuReply Key Features
- Unlimited Warm-up
- Unlimited Sequences
- Cold Email Writer
- Sentiment Analysis
- Multi-Variant Testing
- ESP Routing
- API Access
- Email Warmer
Warmbox Key Features
- Automated email warmup with AI-powered interactions
- Customizable warmup recipes and strategies
- Spam score monitoring and blacklist checks
- Real-time analytics and reporting dashboard
- DNS checker (SPF, DKIM, DMARC)
- Multi-inbox support within a single account
- Auto-reply, open, and favorite marking simulation
- Team collaboration with per-plan member limits
The two lists below are a diff of each vendor's own feature list by exact wording, so a capability both tools offer can appear on either side under a different name.
Listed only by NuReply
- Unlimited Warm-up
- Unlimited Sequences
- Cold Email Writer
- Sentiment Analysis
- Multi-Variant Testing
- ESP Routing
- API Access
- Email Warmer
Listed only by Warmbox
- Automated email warmup with AI-powered interactions
- Customizable warmup recipes and strategies
- Spam score monitoring and blacklist checks
- Real-time analytics and reporting dashboard
- DNS checker (SPF, DKIM, DMARC)
- Multi-inbox support within a single account
- Auto-reply, open, and favorite marking simulation
- Team collaboration with per-plan member limits
Integration Ecosystem
NuReply Integrations
NuReply connects with: Gmail, Outlook, HubSpot, Zapier, SMTP.
Warmbox Integrations
Warmbox connects with: Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo Mail, Amazon SES, SMTP, Zoho Mail.
Shared Integrations
Both tools integrate with: Gmail, Outlook, SMTP.
Integrations listed only by NuReply: HubSpot, Zapier.
Integrations listed only by Warmbox: Google Workspace, Microsoft 365, Yahoo Mail, Amazon SES, Zoho Mail.
Use Case Recommendations
Best Fit for NuReply
- Budget-conscious teams looking for an affordable cold email platform
- Sales teams running high-volume outbound email campaigns
- Agencies managing multiple client outreach programs
- SDR teams focused on pipeline generation
Best Fit for Warmbox
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (8 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
Feature Comparison Summary
| Feature | NuReply | Warmbox |
|---|---|---|
| Starting Price | $25/mo | $19/mo |
| Top Tier Price | $400/mo | Contact Sales |
| Total Features Listed | 8 | 8 |
| Integrations | 5 | 8 |
Getting Started Checklist
- Define your cold email outreach and email domain warming and deliverability requirements and monthly budget
- Estimate your expected email sending volume and warmup email volume to find the right tier
- List the integrations your team currently relies on
- Sign up for free trials or demos of both platforms
- Run a small test with each tool before making a commitment
- Evaluate the onboarding experience and support quality
Final Thoughts
NuReply serves the cold email outreach side of an outbound stack and Warmbox the email domain warming and deliverability side. Warmbox offers a more accessible entry point at $19/mo, while NuReply starts at $25/mo. Your decision should weigh pricing against the specific features that matter most for your workflow.
Start with a trial of each to see which platform fits your team's daily process. The best tool is the one your team actually uses consistently.
Pricing and features verified as of September 2026. Visit NuReply and Warmbox for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between NuReply and Warmbox?
- NuReply is a cold email platform built for sending outbound campaigns and generating replies, while Warmbox is an email warmup tool focused on building sender reputation and improving inbox placement. NuReply handles the outreach side of the workflow, while Warmbox handles the deliverability side, and the two tools address different parts of the same outbound process.
- Which is cheaper, NuReply or Warmbox?
- Warmbox has the lower entry price at $19/mo for its Solo plan, compared to NuReply's Starter plan at $25/mo. NuReply's Starter plan includes 10,000 contacts and 30,000 monthly emails, while Warmbox's Solo plan includes 1 inbox warm-up and 50 emails per day.
- Can I use NuReply and Warmbox together?
- Yes, the article notes that many teams run one of each since they serve different purposes in an outbound stack. NuReply is built for sending campaigns that generate replies, while Warmbox is built for warming up sender reputation, so combining them covers both outreach and deliverability.
- What integrations does NuReply support that Warmbox doesn't?
- NuReply integrates with HubSpot and Zapier, which are not listed among Warmbox's integrations. Both tools share integrations with Gmail, Outlook, and SMTP, but Warmbox instead offers integrations unique to it, such as Google Workspace, Microsoft 365, Yahoo Mail, Amazon SES, and Zoho Mail.
- How many pricing tiers does each platform offer?
- NuReply offers 6 pricing tiers, ranging from the $25/mo Starter plan to the $400/mo Enterprise plan. Warmbox offers 4 tiers, ranging from the $19/mo Solo plan to the $159/mo Growth plan, plus a custom-quoted Enterprise plan for larger needs.
About the author.
Tim Carden is CMO / CTO at RevenueFlow, which builds and operates outbound revenue engines for B2B companies. Studied at McGill University.
Tim Carden · CMO / CTO
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