NuReply vs Warmup Inbox: Cold Email Platform vs Email Warmup Tool Comparison
Compare NuReply (cold email platform) and Warmup Inbox (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 for running AI-personalized outreach campaigns, while Warmup Inbox is an email warmup tool for building sender reputation and inbox placement using a network of over 30,000 real inboxes. NuReply starts at $25/mo, Warmup Inbox starts at $19/mo, and many teams use both together.
Key takeaways
- NuReply's Starter plan costs $25/mo for 10,000 contacts, 500 AI credits, 30,000 monthly emails, and 50 email accounts.
- Warmup Inbox's Basic plan costs $19/mo and includes 75 warmup messages per day per inbox.
- Warmup Inbox exchanges natural-looking email with a network of more than 30,000 real inboxes to build sender reputation.
- NuReply offers 6 pricing tiers ranging from $25/mo to $400/mo, while Warmup Inbox offers 4 tiers ranging from $19/mo to $99/mo plus a custom agency plan.
- NuReply integrates with Gmail, Outlook, HubSpot, Zapier, and SMTP, while Warmup Inbox integrates with Gmail and Workspace, Outlook and Microsoft 365, Zoho Mail, Amazon SES, Mailgun, SendGrid, and Sendinblue (Brevo).
Reviewed and updated September 5, 2026
NuReply vs Warmup Inbox: Cold Email Platform vs Email Warmup Tool Comparison
NuReply (cold email platform) and Warmup Inbox (email warmup tool) sit next to each other in many outbound stacks. They are not substitutes for each other on every job, so this comparison covers pricing, features, and integrations for each and points out where the two meet.
The Quick Answer
NuReply is a cold email platform for cold email outreach; Warmup Inbox 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 Warmup Inbox lists email warmup and cold email sequence.
Warmup Inbox 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 Warmup Inbox. 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.
Warmup Inbox is Email warmup service that exchanges natural-looking email with a network of more than 30,000 real inboxes to build sender reputation automatically. Also offers cold email sequences, language warmup, ESP warmup and IP warmup from the same dashboard.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Basic
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
Warmup Inbox Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Basic | $19/mo | per inbox | 75 warmup messages/day |
| Pro | $59/mo | per inbox | 250 warmup messages/day |
| Max | $99/mo | per inbox | 1,000 warmup messages/day |
| For agencies & teams | Contact Sales | Custom plans starting at 15 inboxes | custom |
Source: Warmup Inbox Pricing
Pricing Analysis
Warmup Inbox 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 Warmup Inbox'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
- Email warmup
- Cold email sequence
- Language warmup
- ESP warmup tool
- IP warmup
- Spam & Category monitoring
- and 3 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
Warmup Inbox Key Features
- Email warmup
- Cold email sequence
- Language warmup
- ESP warmup tool
- IP warmup
- Spam & Category monitoring
- Email reputation Check
- Human-like AI generated content
- Developers API
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 Warmup Inbox
- Email warmup
- Cold email sequence
- Language warmup
- ESP warmup tool
- IP warmup
- Spam & Category monitoring
- Email reputation Check
- Human-like AI generated content
- Developers API
Integration Ecosystem
NuReply Integrations
NuReply connects with: Gmail, Outlook, HubSpot, Zapier, SMTP.
Warmup Inbox Integrations
Warmup Inbox connects with: Gmail & Workspace, Outlook & Microsoft 365, Zoho Mail, Amazon SES, Mailgun, SendGrid, Sendinblue (Brevo), Any inbox with SMTP.
Integrations listed only by NuReply: Gmail, Outlook, HubSpot, Zapier, SMTP.
Integrations listed only by Warmup Inbox: Gmail & Workspace, Outlook & Microsoft 365, Zoho Mail, Amazon SES, Mailgun, SendGrid, Sendinblue (Brevo), Any inbox with SMTP.
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 Warmup Inbox
- Budget-conscious teams looking for an affordable email warmup tool
- Teams that need a wide feature set (9 capabilities listed)
- 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 | Warmup Inbox |
|---|---|---|
| Starting Price | $25/mo | $19/mo |
| Top Tier Price | $400/mo | Contact Sales |
| Total Features Listed | 8 | 9 |
| 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 Warmup Inbox the email domain warming and deliverability side. Warmup Inbox 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 Warmup Inbox for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between NuReply and Warmup Inbox?
- NuReply is a cold email platform built for running AI-personalized outreach campaigns and sequences, while Warmup Inbox is an email warmup tool built for building sender reputation and improving inbox placement. NuReply lists unlimited warm-up and unlimited sequences as features, while Warmup Inbox lists email warmup and cold email sequence.
- Which is cheaper, NuReply or Warmup Inbox?
- Warmup Inbox has the lower entry price at $19/mo for its Basic plan, compared to NuReply's Starter plan at $25/mo. NuReply offers 6 pricing tiers up to $400/mo, while Warmup Inbox offers 4 tiers up to $99/mo plus a custom agency plan starting at 15 inboxes.
- Can I use both NuReply and Warmup Inbox together?
- Yes, many teams run one of each because they solve different parts of outbound email. NuReply focuses on sending campaigns that land in the inbox and generate replies, while Warmup Inbox focuses on building sender reputation, so combining them covers both outreach and deliverability.
- What integrations does each tool support?
- NuReply connects with Gmail, Outlook, HubSpot, Zapier, and SMTP. Warmup Inbox connects with Gmail and Workspace, Outlook and Microsoft 365, Zoho Mail, Amazon SES, Mailgun, SendGrid, Sendinblue (Brevo), and any inbox with SMTP.
- Who is Warmup Inbox best suited for?
- Warmup Inbox is best suited for budget-conscious teams looking for an affordable email warmup tool and teams that need a wide feature set for deliverability, including language warmup, ESP warmup, IP warmup, and spam or category monitoring, all from one dashboard.
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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