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Warmy vs Warmup Inbox: Email Warmup Tools Compared (2026)

By the Warmy deliverability team Updated 8 min read

Warmup Inbox facts checked against its own website, November 2026

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real warmup mailboxes
1M+
real warmup mailboxes
US seed accounts
500K+
US seed accounts
per month, billed monthly
$49
per month, billed monthly
human support
24/7
human support

Warmup Inbox vs Warmy, in short: both warm up your mailboxes automatically, but they're built for different jobs.

Warmup Inbox is a warmup and outreach tool priced per inbox: from $15 per inbox a month on yearly billing, with a free plan, campaign sending and a network of 30,000+ real inboxes.

Warmy is a full deliverability platform from $49 a month: warmup on a 1M+ mailbox network with a B2B or B2C focus, plus a 500,000+ US seed list, inbox placement tests, DMARC monitoring and email verification in every plan.

Quick verdict: choose Warmup Inbox for low-cost warmup and outreach in one tool. Choose Warmy when you need to see where your emails land and fix what's sending them to spam.

Key takeaways

Warmup Inbox vs Warmy at a Glance

Best for

Warmy: Teams that need warmup plus proof of where their emails land

Warmup Inbox: Senders who want budget warmup and outreach in one tool

Starting price

Warmy: $49 a month, billed monthly

Warmup Inbox: $15 per inbox a month, billed yearly; free plan available

Placement testing

Warmy: 5 to 50 seed-based tests a month in every plan

Warmup Inbox: Free one-off placement test; spam and category monitoring in plans

Authentication

Warmy: DMARC monitoring and SPF/DKIM/DMARC checks in every plan

Warmup Inbox: Reputation check in every plan; technical setup check on Max

G2 rating

Warmy: 4.9 / 5

Warmup Inbox: 4.6 / 5

SIDE BY SIDE

Warmy vs Warmup Inbox: Feature Comparison

Both tools run automated warmup. The difference is what comes with it: Warmy puts testing and monitoring in the same plan, while Warmup Inbox pairs warmup with outreach.

Feature comparison of Warmy and Warmup Inbox
CriterionWarmyWarmup Inbox
PositioningAll-in-one, self-serve email deliverability platformEmail warmup and outreach tool for cold email teams
Warmup network (vendor-reported)1M+ real mailboxes across Google Workspace, Microsoft 365 and consumer providers30,000+ real inboxes, 6M+ interactions a day
Choose your audienceB2B plans warm up inside a business-mailbox network (Google Workspace, Microsoft 365); B2C plans inside a consumer network (Gmail, Yahoo, Outlook)Not on its pricing or product pages
Warmup emails a day100 to 5,000 by plan75, 250 or 1,000 per inbox by plan
Warmup repliesOpens, replies, marks as important, rescues from spamSame actions; reply rate capped at 25%, 45% or 50% by plan
Seed list500,000+ real US seed accounts, desktop and mobile, rotated monthlyNot part of its plans
Inbox placement testing5–50 tests a month by plan, plus scheduled auto-testsFree one-off placement test tool; spam and category monitoring of warmup emails
Authentication and reputationDMARC monitoring, SPF/DKIM/DMARC checks, domain and IP reputation tracking with alertsEmail reputation check; technical setup check on Max
Google Postmaster ToolsBuilt inNo native integration
Email verificationBuilt inBuilt into its Campaigns feature
Campaign sendingWorks alongside your sending tool (220+ integrations)Outreach sequences and a unified inbox included
Custom warmupOwn templates and topics, 30+ languages, choice of warmup providersOwn templates, topics, language and ESP warmup from Pro
AgenciesUp to 50 client workspacesMulti-client workspaces on custom plans (51+ inboxes)
APIFull API on every plan, plus n8n, Zapier and MakeDevelopers API; unlimited on Max
SupportDedicated deliverability expert and 24/7 human supportChat; priority support on Pro, premium on Max
Free trial7 days, no credit card7 days, no credit card; free plan

Warmup Inbox details come from its public website, checked November 2026 (see sources). Warmup Inbox is a trademark of its respective owner.

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PRICING

Warmup Inbox vs Warmy Pricing

Warmy offers five plans that cover multiple mailboxes. Warmup Inbox offers three plans priced per inbox, cheaper per inbox as you add more.

Warmy and Warmup Inbox pricing compared
Pricing detailWarmyWarmup Inbox
Starting price$49 / month$15 / inbox / month (yearly)
BillingMonthlyMonthly or annual (−20%)
Plans
  • Starter100 warmup emails/day · 5 tests/mo$49
  • Business300 warmup emails/day · 10 tests/mo$129
  • Premium1,000 warmup emails/day · 25 tests/mo$189
  • Expert2,000 warmup emails/day · 50 tests/mo$279
  • Platinum5,000 warmup emails/day · 50 tests/mo$429
  • Basic75 messages/day · per inbox, yearly$15
  • Pro250 messages/day · per inbox, yearly$49
  • Max1,000 messages/day · per inbox, yearly$79
  • 51+ inboxesCustom quote
Placement testsIncluded in every planSpam and category monitoring; seed placement tests not listed
Also includedGoogle Postmaster integration, API access, custom warmup settings, agency dashboard, Deliverability Academy, private community. 7-day free trial, no credit card.Outreach sequences, dashboards, affiliate program

Prices in USD from each vendor's public pricing page, checked November 2026. Prices can change; confirm on the vendor's site before buying.

The verdict

When to Choose Warmy vs Warmup Inbox

If you want warmup and outreach in one low-cost tool, Warmup Inbox does that well. If you need to know where your emails land, warm up for a consumer audience, or keep authentication and reputation under watch, Warmy covers it in one plan.

Which tool to choose for each need
If you want…Choose
Warmup plus seed-based placement tests by provider in every planWarmy
A network matched to your audience: business mailboxes for B2B, consumer mailboxes for B2CWarmy
DMARC monitoring, email verification and Google Postmaster data in the same planWarmy
Warmup for many client accounts with up to 50 agency workspacesWarmy
A dedicated deliverability expert and 24/7 human supportWarmy
The lowest entry price for a single inbox, or a free planWarmup Inbox
Warmup and campaign sending in one toolWarmup Inbox

Where Warmup Inbox Has the Edge

Credit where it's due. Warmup Inbox has a lower entry price for one inbox, a free plan to start with, and published per-inbox prices, so you can buy a plan without talking to anyone. It also lets you send campaigns and manage replies in the same tool, and gives you manual control over the warmup ramp. If you mainly need warmup for cold outreach and don't plan to test placement or monitor authentication, it's a sensible pick.

Not sure which problem you have? Check where your emails land today with a free deliverability test, or start a 7-day free trial.

SOCIAL PROOF

What Senders Are Saying about Warmy

Rated 4.9/5 on G2 and trusted by 35,000+ happy businesses: marketers, entrepreneurs, and affiliates.

TESTIMONIALS

Loved by senders who live in the inbox

★★★★★5.0
“Warmy has been a game changer for us. The platform pays for itself many times over.”
Darren Prine
Co-founder and CRO, Cloud Tech Gurus
★★★★★5.0
“If you do cold email, Warmy will increase your efficiency, improve your deliverability, and cut your costs.”
Thomas TzouridisThomas Tzouridis
CEO, ActiScale
★★★★★5.0
“I've purchased many marketing tools before. Often, once you buy, you're on your own. With Warmy, they care about you.”
Gábor Majer
Founder, Nord Sales Company
Warmup Inbox logo

What Is Warmup Inbox and How Does It Work?

Warmup Inbox is an email warmup and outreach tool for cold email teams. You connect a mailbox from Gmail, Google Workspace, Outlook, Microsoft 365, Zoho, Amazon SES or SendGrid, and it exchanges emails with a network of 30,000+ real inboxes. Those inboxes open your messages, reply, mark them as important and rescue them from spam, while you set the starting volume, the daily increase and the maximum.

It runs as a web app with three paid plans priced per inbox (Basic, Pro and Max), a free Freemium plan and a 7-day trial. Beyond inbox warmup, Warmupinbox offers outreach sequences, IP warmup, an API and a set of free tools, from a placement test to a Gmail name generator. It holds a 4.6/5 rating on G2.

Warmy logo

What Is Warmy?

Warmy is an email deliverability platform that combines automated email warmup with tools to check where your emails land and fix placement issues. You choose a B2B or B2C focus, and your mailboxes warm up inside a network of 1M+ business or consumer mailboxes. Warmy schedules warmup emails to go out during working hours in the recipient's time zone.

Every plan adds a 500,000+ US seed list, inbox placement tests by provider, DMARC monitoring, domain and IP reputation tracking, Google Postmaster Tools data, email verification and a full API. Adeline, Warmy's AI co-pilot, uses your test results, DNS information and warmup data to tell you what to fix next. Mailbox warmup works with 220+ integrations, and every customer gets a dedicated deliverability expert backed by 24/7 human support.

Email Warmup Process

Warmy email warmup runs through your existing provider and uses a protected network of over a million real Google Workspace, Microsoft 365 and consumer inboxes. It sends during working hours in the recipient's time zone, ramps up gradually, and slows down at night and on weekends.

Warmy simulates natural engagement: it opens emails, replies to them, marks them as important and rescues them from spam. You can choose warmup providers and use your own templates and topics in 30+ languages. Auto-archive keeps warmup messages out of your inbox.

Warmy warm-up dashboard

How Warmup Inbox does it:

a network of 30,000+ real inboxes opens warmup emails, replies to up to 25%, 45% or 50% of them depending on the plan, marks them as important and rescues them from spam. You set the ramp yourself; topics, language and ESP warmup start at Pro.

Why it matters: warmup works best when the network looks like your real audience. Warmy lets you pick a business or consumer network to match who you email.

Using Seed Lists

Warmy adds a 500,000+ US seed list across Gmail, Outlook, Yahoo, corporate and regional providers, including mobile seeds on real US devices. When you send your campaigns to the list, the seed accounts open emails, move them out of spam, scroll and click links. The list rotates every month, so results come from live inboxes. Combined with peer-to-peer warmup, this warms new mailboxes and domains faster than warmup alone.

Warmy seed list

How Warmup Inbox does it:

a seed list isn't part of its plans. It offers a free placement test you can run on a single email.

Why it matters: warmup engages with warmup emails. Seeds engage with your real campaigns, the messages mailbox providers are actually filtering.

Authentication and Sender Reputation

Start with authentication. SPF, DKIM and DMARC are the core protocols in Google's sender requirements. Warmy's DMARC monitoring shows who is sending email using your domain, what's failing and the exact record to change. Free SPF and DMARC generators create correct records in minutes. Warmy also tracks domain and IP reputation continuously, with alerts when a signal drops.

Warmy DMARC monitoring

How Warmup Inbox does it:

an email reputation check on all plans and a technical setup check on Max, plus free SPF and DMARC generators. It has no native Google Postmaster integration.

Why it matters: warmup can't fix a failing DMARC record. If authentication breaks after you add a tool or change ESPs, you want to know the same day.

Measuring Results

Warmy's placement tests run outside the warmup network and break results down by provider, showing Inbox, Promotions and Spam. Scheduled auto-tests keep your baseline up to date. Keep the template and provider mix the same between tests. If most of your recipients use Microsoft 365, watch those results before raising volume, even when the overall score looks healthy.

Warmy inbox placement test by provider

How Warmup Inbox does it:

it reports spam and category placement for warmup emails on its dashboards, and its free placement test checks a single email.

Why it matters: warmup stats describe warmup traffic. A scheduled placement test tells you how the campaign you're about to send will land.

Warmy vs Warmup Inbox: Pros and Cons

Warmy

Pros

  • Seed list, placement tests, DMARC monitoring and verification in every plan
  • Choice of a B2B or B2C warmup network
  • Google Postmaster data and full API on every plan
  • Dedicated expert and 24/7 human support

Cons

  • Higher entry price than one Warmup Inbox Basic inbox
  • No built-in campaign sending; works alongside your sending tool

Warmup Inbox

Pros

  • From $15 per inbox a month, plus a free plan
  • Outreach sequences and a unified inbox included
  • Manual control over the warmup ramp
  • Language and ESP warmup from Pro

Cons

  • Priced per inbox, with features gated by tier
  • Reply rates capped by plan
  • No seed list or native Google Postmaster integration
  • Technical setup check only on Max

How to Switch From Warmup Inbox to Warmy

You don't lose the reputation you've built when you switch: it belongs to your domain and mailbox, not to the warmup tool.

  1. Start a 7-day trial. No credit card needed.

  2. Choose B2B or B2C to match who you email, and connect your mailbox.

  3. Pause warmup in Warmup Inbox for that mailbox. We recommend not running two warmup networks on the same inbox, because it doubles the warmup volume your provider sees.

  4. Run a placement test to get a baseline by provider.

  5. Check DMARC monitoring, fix any failing records it flags, and let the warmup ramp from there.

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FAQ

Warmy vs Warmup Inbox FAQ

Warmup Inbox is a per-inbox warmup and outreach tool with a 30,000+ inbox network. Warmy is a deliverability platform: warmup on a 1M+ mailbox network plus a 500,000+ US seed list, placement tests, DMARC monitoring and email verification in every plan, from $49 a month.
SOURCES & METHODOLOGY

How We Checked This Comparison

To compare Warmup Inbox with Warmy, we used Warmup Inbox's own website: its pricing page, product pages, help center and its own Warmy comparison, all checked November 2026. Warmy details come from Warmy's pricing and product pages. We haven't tested Warmup Inbox hands-on, so this isn't a Warmup Inbox review; where a detail isn't published, we leave it out.

Verified from official pricing:
prices, plan limits, reply-rate caps, free plan.
Vendor-reported:
network size and interaction counts for both tools.
Not independently tested:
warmup results and placement outcomes.

Disclosure: this comparison is published by Warmy, one of the two products compared. We've tried to keep it fair, including where Warmup Inbox is the better choice. Spot something out of date? Tell us and we'll correct it.

  • prices, plans, free tools and features re-checked for both tools.
  • comparison published.

See Warmy's warmup, monitoring, and deliverability tools in action

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