Best Boost Inbox Alternatives in 2026
Looking for alternatives to Boost Inbox? Compare the top email warmup tools by pricing, features, and integrations.
TrulyInbox, Warmforge, and Warmup Inbox are the closest alternatives to Boost Inbox for email warmup, offering options starting free, at $12/mo, and at $19/mo. TrulyInbox stands out with unlimited inbox connections on paid plans and a free tier, while Boost Inbox starts at $5/mo without a free option.
Key takeaways
- Boost Inbox lists an entry plan priced at $5/mo and offers email warmup, full automation, and status reports.
- TrulyInbox starts free, supports unlimited email account connections on all paid plans, and offers customizable reply rates from 10% to 65%.
- Warmforge starts at $12/mo and includes monitoring and health checks, placement tests, and automatic removal of warm-up mail that lands in spam.
- Warmup Inbox starts at $19/mo and exchanges natural-looking email with a network of more than 30,000 real inboxes.
- Warmbox starts at $19/mo and offers customizable warmup recipes, spam score monitoring, blacklist checks, and a DNS checker for SPF, DKIM, and DMARC.
Reviewed and updated September 2, 2026
Best Boost Inbox Alternatives in 2026
Boost Inbox is an email warmup tool built for email domain warming and deliverability. Its entry plan is listed at $5/mo. It may not be the right fit for every team. Here are the alternatives worth a look, drawn from each vendor's own published pricing and feature pages.
Why Consider Alternatives to Boost Inbox
Boost Inbox is a 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. Its entry plan is listed at $5/mo. Its own pages list email warmup, fully automated, status reports.
There are several reasons you might look at other options:
Feature fit: Your team may need specific capabilities that Boost Inbox doesn't offer or handles differently.
Integration needs: If your tech stack requires integrations that Boost Inbox doesn't support natively, an alternative might connect more smoothly.
Top Boost Inbox Alternatives
- Unlimited email account connections on all paid plans
- Customizable reply rate per plan (10% to 65%)
- Customizable email ramp-up schedules
- Human-like email interaction simulation
- and 4 more listed below
- Email Warm Up
- Monitoring & Health Checks
- Placement Tests
- Deliverability Boost
- and 4 more listed below
- Cold email sequence
- Language warmup
- ESP warmup tool
- IP warmup
- and 4 more listed below
1. TrulyInbox
Starting Price: Free | Website: www.trulyinbox.com
Cost-effective email warmup platform that supports unlimited inbox connections on paid plans, with customizable reply rates, ramp-up schedules, and real-time deliverability scoring.
Key Advantages over Boost Inbox:
- Lower starting price (Free vs $5/mo)
- Broader integration ecosystem (7 vs 6 integrations)
- Offers a free tier (Boost Inbox does not)
- Listed by TrulyInbox and not by Boost Inbox (by each vendor's own wording): Unlimited email account connections on all paid plans, Customizable reply rate per plan (10% to 65%), Customizable email ramp-up schedules
Considerations:
- Requires evaluation to see if it fits your specific workflow
Notable Features: Unlimited email account connections on all paid plans, Customizable reply rate per plan (10% to 65%), Customizable email ramp-up schedules, Human-like email interaction simulation, Real-time deliverability score tracking
Integrations: Gmail, Google Workspace, Outlook, Microsoft 365, Zoho Mail, SMTP, Yahoo Mail
2. Warmforge
Starting Price: $12/mo | Website: warmforge.ai
Email warm up tool from the Forge Ecosystem that warms mailboxes with AI-written emails and tracks a per-mailbox Heat Score. Adds DNS, MX and blacklist health checks, placement tests and automatic removal of warm-up mail that lands in spam.
Key Advantages over Boost Inbox:
- Listed by Warmforge and not by Boost Inbox (by each vendor's own wording): Email Warm Up, Monitoring & Health Checks, Placement Tests
Considerations:
- Higher starting price ($12/mo vs $5/mo)
Notable Features: Email Warm Up, Monitoring & Health Checks, Placement Tests, Deliverability Boost, Always-On Warm Up
Integrations: Google Workspace, Microsoft 365, Gmail, Outlook, Salesforge (native), Mailforge (native)
3. Warmup Inbox
Starting Price: $19/mo | Website: www.warmupinbox.com
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.
Key Advantages over Boost Inbox:
- More features listed (9 vs 8)
- Broader integration ecosystem (8 vs 6 integrations)
- Listed by Warmup Inbox and not by Boost Inbox (by each vendor's own wording): Cold email sequence, Language warmup, ESP warmup tool
Considerations:
- Higher starting price ($19/mo vs $5/mo)
Notable Features: Email warmup, Cold email sequence, Language warmup, ESP warmup tool, IP warmup
Integrations: Gmail & Workspace, Outlook & Microsoft 365, Zoho Mail, Amazon SES, Mailgun, SendGrid, Sendinblue (Brevo), Any inbox with SMTP
4. Warmbox
Starting Price: $19/mo | Website: www.warmbox.ai
AI-powered email warmup tool that automates inbox warming with customizable recipes, spam score monitoring, and detailed analytics dashboards to improve cold email deliverability.
Key Advantages over Boost Inbox:
- Broader integration ecosystem (8 vs 6 integrations)
- Listed by Warmbox and not by Boost Inbox (by each vendor's own wording): Automated email warmup with AI-powered interactions, Customizable warmup recipes and strategies, Spam score monitoring and blacklist checks
Considerations:
- Higher starting price ($19/mo vs $5/mo)
Notable 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)
Integrations: Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo Mail, Amazon SES, SMTP, Zoho Mail
5. Mailreach
Starting Price: $25/mo | Website: www.mailreach.co
Email warmup and deliverability platform that uses a smart algorithm with dozens of parameters to generate positive engagement signals, paired with built-in spam testing and DNS monitoring.
Key Advantages over Boost Inbox:
- Broader integration ecosystem (9 vs 6 integrations)
- Listed by Mailreach and not by Boost Inbox (by each vendor's own wording): Smart AI warming algorithm with dozens of parameters, Automated spam testing with 20+ credits included, MailReach Co-Pilot AI deliverability assistant
Considerations:
- Higher starting price ($25/mo vs $5/mo)
Notable Features: Smart AI warming algorithm with dozens of parameters, Automated spam testing with 20+ credits included, MailReach Co-Pilot AI deliverability assistant, Blacklist, SPF, DKIM, and DMARC monitoring, Reputation tracking dashboard per inbox
Integrations: Gmail, Google Workspace, Outlook, Microsoft 365, Zoho, SMTP, Mailgun, SendGrid, and 1 more
6. Mailivery
Starting Price: $29/mo | Website: www.mailivery.io
Email warm-up and deliverability tool that improves sender reputation by holding real conversations in your inbox through a peer to peer network of active mailboxes. Plans are priced on total daily warm-up volume and allow unlimited connected mailboxes, with inbox placement tests, blacklist monitoring and email verification included.
Key Advantages over Boost Inbox:
- More features listed (9 vs 8)
- Listed by Mailivery and not by Boost Inbox (by each vendor's own wording): Email Warm Up, Inbox Placement Test, Blacklist Monitoring
Considerations:
- Higher starting price ($29/mo vs $5/mo)
- Smaller integration ecosystem
Notable Features: Email Warm Up, Inbox Placement Test, Blacklist Monitoring, Email Verification, Custom Warm Up Templates
Integrations: Gmail, GSuite, Microsoft 365, SMTP, SendGrid
7. Lemwarm
Starting Price: $29/mo | Website: www.lemwarm.com
Email warmup tool from lemlist that builds sender reputation using a network of 20,000+ healthy domains, with industry-tailored warmup clusters and deliverability scoring.
Key Advantages over Boost Inbox:
- Broader integration ecosystem (9 vs 6 integrations)
- Listed by Lemwarm and not by Boost Inbox (by each vendor's own wording): Automated email warmup with human-like interactions, Warm-up network of 20,000+ healthy domains, Industry-tailored warmup clusters for natural patterns
Considerations:
- Higher starting price ($29/mo vs $5/mo)
Notable Features: Automated email warmup with human-like interactions, Warm-up network of 20,000+ healthy domains, Industry-tailored warmup clusters for natural patterns, Deliverability score out of 100, Technical setup checker (SPF, DKIM, DMARC)
Integrations: Gmail, Google Workspace, Outlook, Microsoft 365, SMTP, lemlist (native), HubSpot (via lemlist), Salesforce (via lemlist), and 1 more
8. MailToaster
Starting Price: $29/mo | Website: mailtoaster.ai
Automated email warm-up service that builds, maintains and repairs sender reputation using peer-to-peer sending across a network of real inboxes. Warm-up profiles let you choose whether to build, maintain or repair reputation, and the system opens, replies to and removes messages from spam on your behalf.
Key Advantages over Boost Inbox:
- Listed by MailToaster and not by Boost Inbox (by each vendor's own wording): 100% automated email warm-up process, Trusted network of real inboxes for extra security, Positive engagement with your emails
Considerations:
- Higher starting price ($29/mo vs $5/mo)
- Smaller integration ecosystem
Notable Features: 100% automated email warm-up process, Trusted network of real inboxes for extra security, Positive engagement with your emails, Available for GSuite and Outlook, Multiple warm-up profiles to meet your current needs
Integrations: Gmail, GSuite, Outlook
9. EmailWarmup.com
Starting Price: $29/mo | Website: emailwarmup.com
Email deliverability platform whose core product is personalized email warmup, matching your industry and mirroring your copy while warming professional-to-professional and personal-to-personal mailboxes. It adds unlimited email spam tests, a dedicated deliverability consultant, mailbox provisioning with 24/7 replacement, and a warmup API.
Key Advantages over Boost Inbox:
- Broader integration ecosystem (8 vs 6 integrations)
- Listed by EmailWarmup.com and not by Boost Inbox (by each vendor's own wording): Personalized Warmup, Multiple ESP Warmup (Google, Outlook, etc.), Select Warmup Language
Considerations:
- Higher starting price ($29/mo vs $5/mo)
Notable Features: Personalized Warmup, Multiple ESP Warmup (Google, Outlook, etc.), Select Warmup Language, Deliverability Test, Google Postmaster Integration
Integrations: Google, Outlook, Office, SendGrid, Mailchimp, Klaviyo, Shopify, Salesforce
10. Inboxy
Starting Price: $47/mo | Website: inboxy.io
Email warmup tool that improves deliverability by gradually increasing sending volume and boosting domain reputation. It runs warmup through a private network of headless browsers with AI-driven adjustments to sending metrics.
Key Advantages over Boost Inbox:
- More features listed (9 vs 8)
- Broader integration ecosystem (9 vs 6 integrations)
- Listed by Inboxy and not by Boost Inbox (by each vendor's own wording): Primary Inbox Supercharger, Domain Score IQ Monitoring, AI Powered Inbox Adjustments
Considerations:
- Higher starting price ($47/mo vs $5/mo)
Notable Features: Primary Inbox Supercharger, Domain Score IQ Monitoring, AI Powered Inbox Adjustments, Dynamic Email Scheduling, Live Inbox Engagement Feed
Integrations: Personal Gmail, Google Workspace, Outlook/Office (SMTP), Outlook/Office (Oauth), Mailgun, GoDaddy, Inboxroad, Sendgrid, and 1 more
11. Mailwarm
Starting Price: $79/mo | Website: mailwarm.com
Email warmup and deliverability platform that generates engagement across a network of aged real inboxes and includes a deliverability expert on every plan. Each interaction produces several positive signals, such as marking as non-spam, opening, marking as important and replying.
Key Advantages over Boost Inbox:
- More features listed (9 vs 8)
- Listed by Mailwarm and not by Boost Inbox (by each vendor's own wording): B2B & B2C warm up, Spam score monitoring, Provider-Level warmup
Considerations:
- Higher starting price ($79/mo vs $5/mo)
Notable Features: B2B & B2C warm up, Spam score monitoring, Provider-Level warmup, Warmup your email content, Authentication fix tools
Integrations: Gmail, Google Workspace, Outlook, Microsoft 365, Yahoo, Custom SMTP
12. InboxAlly
Starting Price: $149/mo | Website: www.inboxally.com
Enterprise-grade email deliverability platform that uses real seed emails and user-level engagement simulation to train ISPs to place your emails in the primary inbox.
Key Advantages over Boost Inbox:
- Broader integration ecosystem (9 vs 6 integrations)
- Listed by InboxAlly and not by Boost Inbox (by each vendor's own wording): Real seed email engagement (opens, replies, scroll depth), SmartRank optimization with per-ISP reputation scoring, Inbox simulation mimicking genuine user behavior
Considerations:
- Higher starting price ($149/mo vs $5/mo)
Notable Features: Real seed email engagement (opens, replies, scroll depth), SmartRank optimization with per-ISP reputation scoring, Inbox simulation mimicking genuine user behavior, Custom content control for warmup emails, DKIM, SPF, and DMARC verification with correction guidance
Integrations: Gmail, Google Workspace, Outlook, Microsoft 365, SendGrid, Mailgun, Amazon SES, SMTP, and 1 more
13. Warmy
Starting Price: Contact Sales | Website: www.warmy.io
Automated email deliverability tool that warms up domains and IPs with AI-driven automation and a network of business or consumer mailboxes. Adds Google Postmaster integration, seed lists, deliverability insights and email verification in the same platform.
Key Advantages over Boost Inbox:
- Listed by Warmy and not by Boost Inbox (by each vendor's own wording): Email Warm-Up, Email Seed List, Deliverability Insights
Considerations:
- Higher starting price (Contact Sales vs $5/mo)
Notable Features: Email Warm-Up, Email Seed List, Deliverability Insights, Google Postmaster Integration, Email Verification
Integrations: Google Workspace, Microsoft 365, Gmail, Yahoo, Outlook, Google Postmaster
Quick Comparison Table
| Tool | Starting Price | Features | Integrations |
|---|---|---|---|
| Boost Inbox (original) | $5/mo | 8 features | 6 integrations |
| TrulyInbox | Free | 8 features | 7 integrations |
| Warmforge | $12/mo | 8 features | 6 integrations |
| Warmup Inbox | $19/mo | 9 features | 8 integrations |
| Warmbox | $19/mo | 8 features | 8 integrations |
| Mailreach | $25/mo | 8 features | 9 integrations |
| Mailivery | $29/mo | 9 features | 5 integrations |
| Lemwarm | $29/mo | 8 features | 9 integrations |
| MailToaster | $29/mo | 8 features | 3 integrations |
| EmailWarmup.com | $29/mo | 8 features | 8 integrations |
| Inboxy | $47/mo | 9 features | 9 integrations |
| Mailwarm | $79/mo | 9 features | 6 integrations |
| InboxAlly | $149/mo | 8 features | 9 integrations |
| Warmy | Contact Sales | 8 features | 6 integrations |
How to Choose the Right Alternative
Consider these factors when evaluating your options:
Budget: Published entry prices in this roundup range from Free to $149/mo; 1 of the 13 tools quote on request. Make sure the tool you choose fits both your current budget and projected growth.
Email domain warming and deliverability volume: Match the tool's tier limits to your expected usage. Overpaying for capacity you don't need cuts into ROI.
Integration requirements: Check that the alternative connects with your existing CRM, email provider, and automation tools. Migration costs go up when you need to replace workarounds.
Team workflow: The best tool on paper is useless if your team doesn't adopt it. Prioritize platforms that fit how your team already works.
Final Recommendation
There is no single best alternative to Boost Inbox for every team. TrulyInbox has the lowest published entry price at Free. Warmup Inbox offers the broadest feature set. Trial each platform to see which one aligns with your workflow before committing.
Pricing and features verified as of September 2026. Visit each tool's website for the latest information.
Frequently asked questions.
Frequently asked questions- What is the cheapest alternative to Boost Inbox?
- TrulyInbox is the cheapest alternative, starting with a free tier, compared to Boost Inbox's $5/mo entry plan. TrulyInbox also offers unlimited email account connections on all paid plans and customizable reply rates ranging from 10% to 65%.
- Does Boost Inbox offer a free plan?
- No, Boost Inbox does not offer a free tier. Its entry plan is listed at $5/mo, while alternatives like TrulyInbox provide a free starting option for teams that want to test email warmup before paying.
- How does Warmforge compare to Boost Inbox?
- Warmforge starts at $12/mo, higher than Boost Inbox's $5/mo entry plan, but adds monitoring and health checks, placement tests, and automatic removal of warm-up mail that lands in spam. It also integrates natively with Salesforge and Mailforge.
- What does Warmup Inbox offer beyond basic email warmup?
- Warmup Inbox exchanges natural-looking email with a network of more than 30,000 real inboxes and also offers cold email sequences, language warmup, ESP warmup, and IP warmup from the same dashboard. It starts at $19/mo and lists 9 features compared to Boost Inbox's 8.
- Which alternative has the most integrations compared to Boost Inbox?
- Warmup Inbox and Warmbox both list 8 integrations, compared to Boost Inbox's 6. TrulyInbox lists 7 integrations, including Gmail, Google Workspace, Outlook, Microsoft 365, Zoho Mail, SMTP, and Yahoo Mail.
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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