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About

E-Warmup is an AI-powered email deliverability and automated inbox warmup platform built to keep campaigns out of spam and the promotions tab. Backed by 10+ years of manual deliverability consulting for 4,000+ clients, E-Warmup pairs your mailboxes with a peer-to-peer network of 40,000+ real inboxes to secure 98% primary inbox placement. Key capabilities: • AI Read Emulation: Simulates authentic human reading speeds, scroll pauses, and multi-language replies instead of detectable bot opens. • Real-Copy Warmup: Train spam filters using your actual sales sequences and niche topics. • Multi-ESP Support: Route warmup through Gmail, Outlook, Zoho, SendGrid, Amazon SES, or custom SMTP. • 24/7 Reputation Shield: Continuous DNS health tracking (SPF, DKIM, DMARC), bounce monitoring, and automated blacklist removal across 100+ lists. • Seed List Warmup: Protect non-SMTP platforms like Klaviyo and Mailchimp. Start warm up & fix your deliverability free in 25 sec.

About

InboxStack is an email deliverability intelligence platform built around Brain, a proprietary causal AI engine that identifies why emails miss the inbox — not just that they did. Most deliverability tools stop at monitoring: they show a drop in inbox placement or a blocklist hit and leave you to investigate. InboxStack goes further, correlating signals from your ESP, DNS authentication records (SPF, DKIM, DMARC), Google Postmaster Tools, Microsoft SNDS, and 50+ blocklists through a causal knowledge graph built on a 22-year deliverability knowledge base — tracing the actual root cause, whether it's a DKIM misalignment, IP reputation dip, or content trigger. Onboarding starts with forwarding your email headers for an instant DNS/auth audit, no migration required. Teams that want ongoing monitoring can connect their ESP and Postmaster accounts, with optional seed testing for real inbox-vs-spam placement data. Built especially for digital agencies and ESP's.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

SMEs, SaaS, Sales Team, Marketing Team, Outbound teams

Audience

Any comapny who sends emails or manages email campaigns

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

$49/month
You can get started completely free with no credit card required and no expiration date. When you're ready to scale, we offer flexible plans billed monthly or annually (with 2 months free on yearly billing):

Basic ($49/mo or $41/mo billed yearly): Perfect for small teams getting started. Covers 5 mailboxes, up to 150 warmup emails daily per inbox, 10 DNS & inbox placement tests each month, blacklist tracking, and warmup using your own email copy.

Growth ($99/mo or $83/mo billed yearly): Our most popular tier for growing outbound teams. Covers 20 mailboxes, up to 300 warmup emails daily per inbox, 25 monthly placement tests, advanced email monitoring, AI read emulation, warmup across 30+ languages, and premium support.

Premium ($189/mo or $157/mo billed yearly): Designed for agencies and high-volume senders. Covers 40 mailboxes, up to 500 emails daily per inbox, 50 monthly placement tests, warmup provider selection, and a dedicated support channel.

High Volume (Custom): For enterprise setups needing unlimited mailboxes, unlimited warmup volume, API/webhook integrations, white-label dashboards, and dedicated campaign management.

All plans come with a risk-free 14-day money-back guarantee, allowing you to test our deliverability platform with complete confidence.
Explore our full pricing and compare plans on our website.
Free Version Supported
Free Trial Supported

Pricing

$49/month
Free Version Not Supported
Free Trial Supported

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 4.5 / 5
support 5.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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Pros & Cons from Real Users

Pros

  • The platform advertises one-click account syncing, support for 30+ warmup languages, and the option to choose b2b or b2c warmup providers. Custom email templates, selectable warmup providers, and detailed analytics are cited as helpful for pinpointing deliverability problems. It includes blacklist monitoring, placement testing, sender authentication checks, and IP/domain health dashboards with alerts. one of the best warmup tools they've tried, free help with SPF, DKIM and DMARC setup, and report improved open rates on cold outreach.
  • E-Warmup is easy to use and gives a clear view of mailbox health and warmup activity. I particularly like the monitoring features because they make it easier to understand how email accounts are performing and identify potential deliverability issues. The interface is straightforward, and the overall setup process is simple.

Cons

  • No cons at all. overall experience is excellent...
  • Some advanced options could be explained more clearly for new users, especially when setting up accounts and understanding the different deliverability settings.

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Supported

Company Information

E-Warmup
Founded: 2023
United States
e-warmup.com

Company Information

InboxStack
Founded: 2025
India
inboxstack.com

Alternatives

LiftInbox

LiftInbox

Unique Technologies

Alternatives

Categories

Email Warmup Supported

Categories

Email Deliverability Features

Deliverability Alerts Supported
Deliverability Reporting Supported
DMARC Analytics Supported
Email Address Verification Not Supported
Email Content Testing Supported
Email Previewing Supported
Inbox Placement Testing Supported
IP Blacklist Monitoring Supported
Reputation Reporting Supported

Integrations

Gmail Supported
Microsoft Outlook Supported
Yahoo! Mail Supported
Amazon SES Supported
Google Workspace Supported
Mailgun Supported
Microsoft 365 Supported
SMTP Provider Supported
SendGrid Supported
SendPost Supported
Zoho Mail Supported

Integrations

Gmail Supported
Microsoft Outlook Supported
Yahoo! Mail Supported
Amazon SES Not Supported
Google Workspace Not Supported
Mailgun Not Supported
Microsoft 365 Not Supported
SMTP Provider Not Supported
SendGrid Not Supported
SendPost Not Supported
Zoho Mail Not Supported
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