
Mailwarm
Warmbox.ai
Warmy.io
MailReach.co
Folderly
Lemwarm by Lemlist
lemlist
Warmup Inbox is a tool that automates the process of warming up your email inboxes, raising your sender reputation and inbox health automatically.

BuiltWith
Wappalyzer
WhatRuns
StackScan
W3Techs
PublicWWW
ZoomInfo
Explore real-time technology identification and gain insights into the tools powering top websites with StackDetect.

Which is more popular?
Based on our record, Warmup Inbox seems to be more popular. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | warmupinbox.com | stackdetect.vercel.app |
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| Company | — | Startup from the United States · 1 - 9 employees · 2025 |
| Listed in |
In their own words, as submitted to SaaSHub.


The process of preparing an email address for general use or email outreach is commonly referred to as “Warming Up” an inbox, where you take a number of steps to ensure that an email address does not become deactivated, blacklisted, or automatically marked as spam when it begins to send outgoing...
At StackDetect, we’re passionate about unlocking the power of technology for businesses of all sizes. Our platform offers more than just insights into tech stacks – we provide actionable data that empowers companies to make informed decisions, optimize their operations, and stay ahead of the...
What each product offers, as listed by its team.


An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of StackDetect yet.
Walkthroughs and reviews on video.
How to Setup Warmup Inbox | Email Inbox Warmup for Cold Email | Lemwarm Alternative
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Warmup Inbox and StackDetect.
StackDetect's answer:
It is a top leading competitor to other websites
StackDetect's answer:
Free low cost, and highly UX UI friendly
StackDetect's answer:
Self driven start up company that is bootstrapped and audience driven.
StackDetect's answer:
NodeJS MongoDB HTML JS Git CSS TS
StackDetect's answer:
anyone that is familiar with BuiltWith, WAAMPLYZER. This is a competitor to most.
StackDetect's answer:
IT / Technology Analysis
Share your experience with using Warmup Inbox and StackDetect. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Source credits: Vendor capabilities summarized based on information from current public pages and resources, including: Warmup Inbox’s product documentation and updates, lemwarm’s network and plan materials, Warmy’s...
And now you got the options to choose an inbox type now here your real deal starts.Once you sign up, Warmup Inbox floods your inbox with good emails. The tool automatically builds and sends smart dynamic content...
Warmup Inbox is rated 2.9 / 5 on average, out of 9 reviews on G2 and Capterra. Note: This low rating doesn’t necessarily reflect the Warmup Inbox’s actual value. Indeed, since they have only 9 ratings, a few bad...
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Recommendations tracked on public social media and blogs since March 2021.


I went to mail-tester.com to check the spamminess of my email and it comes back as a 4.4/10 and says that I should consider myself lucky if my emails go to primary inbox. Is there any way to solve this? Does a tool like warmupinbox.com... Source: over 3 years ago
I'm also using warmupinbox.com with the same email address and see no problems. Source: almost 4 years ago
Join this warmup tool it is 9 buscks a month and will improve your domain at least for other providers, I dont think it will help with outlook tho. https://warmupinbox.com im one week sending and receiving about 50 emails a day. Source: over 4 years ago
Tracking StackDetect since Feb 2025.
When comparing Warmup Inbox and StackDetect, you can also consider the following products.

Email warmup tool to avoid spam folder, since 2020 - Backed by Email Deliverability Experts
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Warm up your cold email inbox, and never land in spam anymore!
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Wappalyzer is a technology profilers and leads data provider. Create lists of websites and contacts that use certain technologies.
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Extension that helps you identify technologies used on any website at the click of a button.
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