
Warmbox.ai
MailReach.co
Warmy.io
Warmup Inbox
Lemwarm by Lemlist
Folderly
lemlist
Email warmup tool to avoid spam folder, since 2020 - Backed by Email Deliverability Experts

Shopify Upsell Bundles App
V Bundles
Skai Lama Easy Bundles
In Cart Upsell
Magic Bundles
Upsell.com
iCart Cart Drawer Cart Upsell
Simplify product grouping with PushBundle, a smart Shopify bundle app. Boost sales, customize offers, and enjoy easy setup with real merchant support.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | mailwarm.com | pushbundle.com |
| Pricing | ||
| Platforms | — | |
| Company | Startup from France · 10 - 19 employees · 2020 | Startup from Bangladesh · 20 - 49 employees |
| Listed in |
In their own words, as submitted to SaaSHub.


Mailwarm is an automated email warmup and deliverability platform designed to help businesses keep their emails out of spam folders and consistently reach the inbox. Since 2020, Mailwarm has helped founders, sales teams, marketers, and agencies improve email deliverability, build strong sender...
Pushbundle is a product bundling app for Shopify that allows e-commerce merchants to increase sales and average order value by offering various bundling options. It enables customers to create their own personalized "mix & match" bundles, receive volume discounts, and add products that are...
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Mailwarm and PushBundle.
Mailwarm's answer
Mailwarm is an email warmup and deliverability platform built by a Y Combinator and Station F startup.
Since 2020, we’ve worked with many types of companies: SaaS startups, recruitment agencies, e-commerce brands, and sales teams; to help them improve inbox placement safely.
Mailwarm is unique because it offers: - Real multi-provider warmup (Gmail, Outlook, Microsoft 365, Yahoo)
Clear and real spam score tracking
Built-in bounce prevention
Easy setup and stable automation
Our focus is simple: help businesses keep emails out of spam and land in the inbox.
PushBundle's answer:
PushBundle is unique for its comprehensive toolkit for creating diverse and customizable product bundles, including mix-and-match options where customers can build their own packs, and volume-based bundles with tiered discounts.
Mailwarm's answer
Mailwarm delivers real, measurable results instead of risky shortcuts.
Users choose Mailwarm because it provides: - Automated email warmup that protects sender reputation
Multi-provider engagement for realistic signals
Spam score to track deliverability progress
One-click Outlook and Office365 connection
Reliable campaigns with auto-recovery
It’s an easy, transparent, and professional way to improve email deliverability.
PushBundle's answer:
person should choose PushBundle over its competitors because it provides a user-friendly, customizable, and mobile-optimized solution for creating product bundles, which can increase sales, average order value, and customer satisfaction. Its "build-your-own" bundle feature is designed to naturally encourage customers to add more items by leveraging the "threshold effect," helping to boost revenue without deep discounting.
Mailwarm's answer
Mailwarm is for anyone who depends on email outreach:
Sales teams sending cold emails
Founders and startups launching new domains
Marketing agencies
Recruiters and staffing firms
Growth and outbound teams
If inbox placement matters to your business, Mailwarm is built for you.
Mailwarm's answer
Mailwarm started as a real problem we faced ourselves.
We were two founders working at Station F in Paris, the largest startup incubator in Europe, trying to sell our own products. Every time we launched outreach campaigns, our emails kept landing in spam.
To solve this, we built an internal email warmup system for our personal use. After deep research into email deliverability, we created a stronger, more reliable solution.
Other startups in the incubator quickly asked to use it too; so we turned it into a real product.
After launching publicly, Mailwarm became #1 Product of the Day on ProductHunt and was accepted into Y Combinator, the world’s most prestigious startup accelerator.
Since then, Mailwarm has grown into a trusted platform used by thousands of companies to improve inbox placement and email deliverability.
Mailwarm's answer
Mailwarm is a secure cloud-based SaaS platform built on:
SMTP and IMAP email protocols
Advanced verification systems
Multi-provider infrastructure
Real-time analytics and monitoring
Reliable automation engines
These technologies ensure stable, continuous email warmup.
Mailwarm's answer
As a Y Combinator and Station F startup, Mailwarm works with:
Tech startups and SaaS companies
Recruitment and staffing agencies
Real Estate Agencies
B2B marketing agencies
E-commerce brands
Sales and outbound teams
Freelancers and consultants
From France to global markets, hundreds of organizations trust Mailwarm to improve email deliverability and inbox placement.
Share your experience with using Mailwarm and PushBundle. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


I decided to try Mailwarm after having consistent issues with my emails landing in spam folders. At the beginning, I wasn’t fully sure what to expect, but the onboarding process was simple enough to get me started...
I started using Mailwarm because I was struggling with my emails going straight to spam, especially for outreach. At first, I wasn’t expecting much, but after a couple of weeks, I actually started noticing a...
I have been using Mailwarm to warm up email accounts and improve overall deliverability for my outreach campaigns. The setup process was very simple and everything runs automatically without requiring constant...
We have no reviews of PushBundle yet. Be the first one to post
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The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.
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Easy Bundles is a seamless Bundle Builder, Build Your Own Bundle, Gift Box Builder app that offers Fixed Price, Discounted, Mix-and-match & Subsription Bundles to boost your AOV.
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