Last updated: March 2026
What Is Warmy?
Warmy.io is an AI-powered email warmup and deliverability platform designed to keep your emails out of spam folders. It works by gradually increasing your sending volume through a network of real mailboxes, building your sender reputation over time. If you run cold email campaigns, send marketing emails, or simply want to make sure your messages actually land in people's inboxes, Warmy automates the entire warmup process so you do not have to think about it.
Key Features
- Automated Email Warmup: Sends and receives emails through a network of real mailboxes to build your sender reputation. The AI adjusts volume and patterns based on your domain's health.
- Domain Health Dashboard: Consolidates all deliverability metrics into a single view, including inbox placement rates, DNS authentication status, blacklist monitoring, and a numeric health score.
- Seed List Testing: Uses genuine email addresses across major providers (Gmail, Outlook, Yahoo) to test where your emails actually land. Tracks metrics like emails moved from spam, emails read, and links clicked.
- Template Checker: A browser extension that analyzes your email templates before you send them. Flags spammy language, formatting issues, and other factors that could hurt inbox placement.
- DNS Authentication Checks: Validates SPF, DKIM, and DMARC records to make sure your domain's technical setup is not causing deliverability problems.
- Google Postmaster Integration: Pulls data directly from Google Postmaster Tools into the Warmy dashboard, so you can see Gmail-specific deliverability metrics alongside everything else.
- Multi-Language Warmup: One of the few warmup tools that can send warmup emails in foreign languages, useful for businesses operating in non-English markets.
Pricing
Warmy no longer lists plan prices on its pricing page. Pricing is volume-based and quoted through a demo, and a 7-day free trial is available without a credit card.
Warmy publishes no list prices; plans are quoted by sales, per the Warmy pricing page (checked September 2026).
What We Like
- Set-and-forget warmup that runs automatically once you connect your mailbox
- The domain health dashboard gives a clear, actionable overview of your deliverability status
- Seed list testing with real mailboxes provides more accurate inbox placement data than synthetic tests
- Template checker catches potential spam triggers before you hit send
- Multi-language warmup support is rare and genuinely useful for international teams
- Several free tools (deliverability checker, ROI calculator) are available even without a paid plan
What Could Be Better
- Pricing is not published: it is volume-based and quoted through a demo, so you cannot estimate the cost of multiple inboxes up front.
- No mobile app for checking deliverability metrics on the go
- The starter plan feels limited for teams doing serious cold outreach volume
- Setup can be confusing for non-technical users who are not familiar with DNS records and email authentication
- Customer support response times vary depending on your plan tier
Who Should Use Warmy?
Warmy is ideal for solo founders, SDRs, and small sales teams warming up one to three mailboxes for cold email campaigns. If your emails have been landing in spam and you need a straightforward way to fix it, Warmy delivers. Marketing teams sending newsletters or transactional emails will also benefit from the deliverability monitoring and domain health tracking. If you are launching a new domain for outbound sales, warming it up with Warmy before sending any real campaigns is a smart move.
Who Should Skip Warmy?
Agencies and sales teams managing five or more mailboxes should carefully calculate costs before committing, because pricing scales with volume. If you are already using a cold email platform that includes built-in warmup (like Instantly, Smartlead, or Lemlist), paying separately for Warmy may not make financial sense. Enterprise teams with dedicated email operations staff may find the feature set too basic for their needs.
How long does email warmup take with Warmy?
Most domains see measurable improvement within two to four weeks, though it depends on your starting reputation. New domains typically need the full four weeks. Domains that were previously flagged for spam may take longer. Warmy recommends keeping the warmup running continuously, even after your reputation improves, to maintain inbox placement rates.
Does Warmy work with Gmail and Outlook?
Yes. Warmy supports Gmail, Google Workspace, Outlook, Microsoft 365, and most SMTP/IMAP email providers. Setup involves connecting your mailbox via OAuth or SMTP credentials, and the warmup begins automatically.
Will Warmy fill my inbox with warmup emails?
Warmy's warmup emails are automatically sorted and managed. They do not clutter your primary inbox. The system handles replies, engagement signals, and cleanup so the warmup process stays invisible to your regular email workflow.
Can I use Warmy alongside other cold email tools?
Absolutely. Warmy runs independently of your cold email platform. You can use it alongside tools like Woodpecker, Lemlist, Instantly, Apollo, or any other outreach tool. It warms up your mailbox in the background while your campaigns run separately.
Our Verdict
Warmy does one thing and does it well: keeping your emails out of spam. The automated warmup is genuinely hands-off, the domain health dashboard provides actionable insights, and the seed list testing gives you confidence that your emails are actually reaching inboxes. The main drawback is pricing. Pricing is volume-based and only quoted through a demo, and costs escalate quickly for teams managing multiple accounts. For solo operators or small teams with one to three mailboxes, the investment pays for itself if it keeps your cold emails landing in primary inboxes instead of spam. Run the free deliverability checker first, see where you stand, and then decide if the paid warmup is worth the cost for your situation.
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