Warmup Inbox
Warmbox.ai
Mailwarm
lemlist
Lemwarm by Lemlist
DitLead
Instantly.ai
SmartLead.ai
Munger.ai
SmartLead.ai
Instantly.ai
Klaviyo
MailChimp
lemlist
ListKit.io
Spend Bill Gates' Money
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 messages to other recipients.
Warming Up an email inbox essentially is recreating the way a typical person will use an email address. Just by using your email address normally, you are ‘warming up’ your inbox by sending outgoing mail to other existing users. When you are reading your emails, starring/favoriting certain messages, and engaging in email threads with multiple other email addresses, you are building up your domain reputation in a way that shows that your account is being controlled by a real human being and is not being used to send out unsolicited emails that are trying to mislead/scam/defraud any other real people using their email inbox.
Your One-Input Pipeline to 50+ Meetings
Tell us what you sell. Our AI automatically finds ideal prospects, writes personalized emails, and books qualified meetings on your calendar.
A Better Way to Do Cold Email Stop managing tools. Start booking meetings.
2 min Setup Time Just fill out a product brief. We handle domains, mailboxes, and campaigns.
90% Automated Set it once and let it run. No daily management or manual work needed.
$97 All Inclusive Everything included - domains, mailboxes, AI, and sending. No hidden fees.
Warmup Inbox Munger.aiNo Munger.ai videos yet. You could help us improve this page by suggesting one.
Munger.ai's answer:
B2B companies requiring sales meetings.
Munger.ai's answer:
Other tools require manual setup, list building, and copywriting. Munger.ai is 100% automated - it finds prospects, writes emails, sends campaigns, and books meetings without any manual work.
Munger.ai's answer:
Why Choose Munger.ai? See how we compare to other solutions. We're the only automated option.
Features Munger.ai Apollo SmartLead Instantly DIY Setup
Time to first meeting booked 24-48 hours 2-4 weeks 1-3 weeks 1-2 weeks 3-6 weeks
Setup complexity 2 minutes 20+ hours 10+ hours 15+ hours 40+ hours
Guaranteed open rate 25-45% 8-15% 10-18% 12-20% 5-10%
Pre-warmed infrastructure 70+ domains ready Use your domain DIY warmup DIY warmup Start from zero
AI prospect research 250M+ database Buy separately Not included Not included Manual research
Email personalization AI reads LinkedIn Mail merge only Basic variables Basic variables Manual writing
Reply handling AI books meetings You respond You respond You respond You respond
Hidden costs None - all inclusive +$500 warmup +$200 extras +$300 tools +$1000s in tools
Real monthly cost $97 total $649+ $323+ $464+$2000+
Time investment/month 0 hours 40+ hours 60+ hours 50+ hours 100+ hours
Meetings booked/month 20-60 5-15 5-20 10-25 0-10
Munger.ai's answer:
At Munger.ai, we believe people weren’t born to spend their lives clicking screens all day, stuck doing marketing tasks they don’t enjoy. You were born to build, to create, to spend time with your family, to go outside and touch the grass—to focus on what truly matters.
The problem is that marketing has become one of those necessary but dreaded parts of business. Over the past eight years, our founders ran a marketing agency serving more than 500 clients, speaking with thousands of business owners. Again and again, we heard the same frustrations: wasted time, wasted money, and being let down by agencies. Marketers themselves admitted they were burning countless hours figuring out campaigns instead of building great products.
That’s why we built Munger.ai: the first AI-first outbound system that automates 90% of marketing. Instead of sinking thousands of hours into prospecting, copywriting, data cleaning, and campaign setup, founders can simply describe their product once, choose their target audience, and let our AI handle the rest.
Behind the scenes, Munger sources verified leads from a database of hundreds of millions of contacts, writes personalized emails trained on past and real-time campaign data, and launches fully optimized campaigns at scale—tens of thousands to even a million emails per day. Open rates consistently hit 30–50% on cold traffic, and every email looks handwritten, researched, and personal.
The vision is bigger than just cold email. Munger is building toward a future where every form of marketing is automated—so founders and teams can stop obsessing over funnels and ad dashboards, and instead get back to what they love: building world-changing products and living fulfilling lives.
Munger.ai's answer:
Munger.ai is built on a modern AI and cloud-native stack. Core technologies include:
Large Language Models (LLMs) for email copywriting, personalization, and campaign optimization.
Custom-trained machine learning systems for deliverability management, open-rate prediction, and real-time optimization.
High-volume sending infrastructure with 70+ pre-warmed domains and distributed mail servers capable of sending up to 1M emails/day.
Massive contact databases (250M+ verified records) with automated enrichment and validation pipelines.
Scalable cloud infrastructure (containerized architecture, API-first design) for reliability and performance at scale.
Munger.ai's answer:
Since Munger.ai primarily serves B2B founders, agencies, and sales teams, some of the biggest customer categories include:
B2B SaaS startups looking to book more demos and scale outbound.
Agencies replacing manual SDR work with AI-driven cold outreach.
Consulting firms and service providers who need a steady flow of qualified appointments.
Enterprise sales teams that require consistent pipeline generation at scale.
Based on our record, Warmup Inbox seems to be more popular. It has been mentiond 4 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
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 solve a lot of these problems? Source: over 2 years ago
I'm also using warmupinbox.com with the same email address and see no problems. Source: almost 3 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 3 years ago
You can also use a warm up service like https://warmupinbox.com/ for 9 bucks a month will improve your domain reputation. Source: over 3 years ago
Warmbox.ai - Warm up your cold email inbox, and never land in spam anymore!
SmartLead.ai - Email Automation Platform
Mailwarm - The email warm-up tool.
Instantly.ai - Build your own infinitely scalable cold email outreach system with Instantly.
lemlist - Send emails that get replies 💌
Klaviyo - Klaviyo helps brands own the customer experience, grow higher-value relationships, and deliver more personalized marketing experiences across email, mobile, and web.