Boost Inbox vs NuReply: Email Warmup Tool vs Cold Email Platform Comparison
Compare Boost Inbox (email warmup tool) and NuReply (cold email platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Boost Inbox is an email warmup tool starting at $5/mo, built for email domain warming and deliverability, while NuReply is an AI cold email platform starting at $25/mo, built for running outreach campaigns and sequences. Teams choose based on workflow needs: warming sender reputation versus sending and personalizing cold email campaigns. Many teams use both together.
Key takeaways
- Boost Inbox's entry plan costs $5/mo and includes 1 mailbox for warmup with 50 daily positive engagements.
- NuReply's entry plan costs $25/mo and includes 10,000 contacts, 500 AI credits, 30,000 monthly emails, and 50 email accounts.
- NuReply offers 6 pricing tiers ranging from $25/mo to $400/mo, compared to Boost Inbox's 3 tiers ranging from $5/mo to $19/mo.
- Boost Inbox lists 6 integrations including Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, and SMTP, while NuReply lists Gmail, Outlook, HubSpot, Zapier, and SMTP.
- Both platforms share Gmail and SMTP integrations, and NuReply is operated by DuoCircle LLC.
Reviewed and updated September 5, 2026
Boost Inbox vs NuReply: Email Warmup Tool vs Cold Email Platform Comparison
Boost Inbox is an email warmup tool; NuReply is a cold email platform. Whether you need one, the other, or both depends on which part of the workflow you are buying for: email domain warming and deliverability on one side, cold email outreach on the other. This guide lays out what each vendor publishes.
The Quick Answer
Boost Inbox is an email warmup tool for email domain warming and deliverability; NuReply is a cold email platform for cold email outreach. By each vendor's own wording, Boost Inbox lists email warmup and fully automated, and NuReply lists unlimited warm-up and unlimited sequences.
Boost Inbox offers a lower entry point at $5/mo compared to NuReply at $25/mo.
If your priority is building sender reputation and improving inbox placement, Boost Inbox is the one built for it; for sending campaigns that land in the inbox and generate replies, that is NuReply. Many teams run one of each.
Understanding the Core Difference
Boost Inbox is Email warmup service that gradually increases sending activity to build trust with email providers. It sends realistic emails from your inbox on a daily basis, keeps them out of spam, opens and bookmarks them, and replies to a portion of them to generate positive interactions.
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.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Starter
Starter
Boost Inbox Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $5/mo | 1 Mailbox For Warmup | 50 Daily Positive Engagement |
| Team | $9/mo | 3 Mailboxes For Warmup | 50 Daily Positive Engagement per mailbox |
| Premium | $19/mo | 8 Mailboxes For Warmup | 50 Daily Positive Engagement per mailbox |
Source: Boost Inbox Pricing
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
Pricing Analysis
Boost Inbox is more affordable at the entry level ($5/mo vs $25/mo). For teams with tight budgets or those just getting started with email domain warming and deliverability and cold email outreach, this price difference matters.
NuReply offers 6 pricing tiers compared to Boost Inbox's 3, giving you more granularity as you scale.
Features Breakdown
- Email Warmup
- Fully Automated
- Status Reports
- Human Review
- Premium Support
- Realistic emails sent from your inbox daily
- and 2 more listed below
- Unlimited Warm-up
- Unlimited Sequences
- Cold Email Writer
- Sentiment Analysis
- Multi-Variant Testing
- ESP Routing
- and 2 more listed below
Boost Inbox Key Features
- Email Warmup
- Fully Automated
- Status Reports
- Human Review
- Premium Support
- Realistic emails sent from your inbox daily
- Email health checker tool
- Inbox reputation analytics
NuReply Key Features
- Unlimited Warm-up
- Unlimited Sequences
- Cold Email Writer
- Sentiment Analysis
- Multi-Variant Testing
- ESP Routing
- API Access
- Email Warmer
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 Boost Inbox
- Email Warmup
- Fully Automated
- Status Reports
- Human Review
- Premium Support
- Realistic emails sent from your inbox daily
- Email health checker tool
- Inbox reputation analytics
Listed only by NuReply
- Unlimited Warm-up
- Unlimited Sequences
- Cold Email Writer
- Sentiment Analysis
- Multi-Variant Testing
- ESP Routing
- API Access
- Email Warmer
Integration Ecosystem
Boost Inbox Integrations
Boost Inbox connects with: Gmail, GSuite, Outlook 365, Yahoo Mail, Amazon SES, SMTP.
NuReply Integrations
NuReply connects with: Gmail, Outlook, HubSpot, Zapier, SMTP.
Shared Integrations
Both tools integrate with: Gmail, SMTP.
Integrations listed only by Boost Inbox: GSuite, Outlook 365, Yahoo Mail, Amazon SES.
Integrations listed only by NuReply: Outlook, HubSpot, Zapier.
Use Case Recommendations
Best Fit for Boost Inbox
- Budget-conscious teams looking for an affordable email warmup tool
- Organizations with complex tech stacks needing broad integration support (6 integrations)
- Teams launching new email domains for outreach
- Organizations recovering from deliverability issues
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
Feature Comparison Summary
| Feature | Boost Inbox | NuReply |
|---|---|---|
| Starting Price | $5/mo | $25/mo |
| Top Tier Price | $19/mo | $400/mo |
| Total Features Listed | 8 | 8 |
| Integrations | 6 | 5 |
Getting Started Checklist
- Define your email domain warming and deliverability and cold email outreach requirements and monthly budget
- Estimate your expected warmup email volume and email sending 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
Boost Inbox serves the email domain warming and deliverability side of an outbound stack and NuReply the cold email outreach side. Boost Inbox offers a more accessible entry point at $5/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 Boost Inbox and NuReply for current information.
Frequently asked questions.
Frequently asked questions- What is the difference between Boost Inbox and NuReply?
- Boost Inbox is an email warmup tool focused on email domain warming and deliverability, while NuReply is an AI cold email outreach platform that personalizes emails and runs multi-step campaigns. They address different parts of the outreach workflow, with Boost Inbox building sender reputation and NuReply handling campaign sending.
- Which is cheaper, Boost Inbox or NuReply?
- Boost Inbox is cheaper at the entry level, starting at $5/mo compared to NuReply's $25/mo starting price. Boost Inbox has 3 pricing tiers up to $19/mo, while NuReply has 6 tiers scaling up to $400/mo for higher contact and email volume limits.
- Do Boost Inbox and NuReply integrate with the same tools?
- They share two integrations: Gmail and SMTP. Boost Inbox additionally connects with GSuite, Outlook 365, Yahoo Mail, and Amazon SES, while NuReply additionally connects with Outlook, HubSpot, and Zapier.
- Can I use Boost Inbox and NuReply together?
- Yes, many teams run both tools since they solve different problems. Boost Inbox handles email warmup and deliverability while NuReply handles the actual cold email campaigns, so using one for warming sender reputation and the other for sending outreach is a common setup.
- Who should choose Boost Inbox over NuReply?
- Boost Inbox fits budget-conscious teams needing an affordable warmup tool, organizations with complex tech stacks needing broad integration support across 6 platforms, teams launching new email domains, and organizations recovering from deliverability issues.
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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